Channel Master 7777

High-gain mast-mount UHF/VHF TV antenna preamplifier

Item #: 6597777

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63 Reviews

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The 7777 is part of Channel Master's high-performance Titan 2™ series of mast-mounted preamplifiers. It is an ultra-low-noise, ultra-high-gain design that can solve a number of reception problems, and is especially effective for long-range "deep-fringe" applications. Several Crutchfield customers have reported that they are receiving digital stations from 50+ miles away using the 7777 in combination with Channel Master's 4228HD antenna.

Two-piece mast-mounted preamplifiers have an advantage over more typical one-piece in-line units because the amplifier module is mounted near the antenna itself, to eliminate amplification of any noise or interference in your coax cable. A preamplifier can improve reception whether the problem is weak signal strength at your antenna, or loss of signal quality due to a long cable run between your antenna and TV.

Installation is simple: run a length of RG-6 cable from your antenna to the 7777's amplifier module, and another RG-6 cable from the amp to the 7777's power supply. Power is provided to the amplifier via the RG-6 cable, so no other wiring is necessary, and the power supply can be placed indoors to avoid exposure to the elements. Finally, run a length of RG-6 from the power supply either directly to your TV, or to a video distribution hub.

Product Highlights:

  • two-piece design with separate mast-mounted amp module and power supply
  • high-gain, low-noise operation for deep fringe reception
  • compatible with both digital and analog TV signals
  • separate amplification for VHF (channels 2-13) and UHF (channels 14-69)
  • VHF gain: 23 dB, VHF noise: 2.8 dB
  • UHF gain: 26 dB, UHF noise: 2.0 dB
  • filtering for rejection of out-of-band signals
  • switchable FM trap (allows FM reception)
  • 75-ohm input and output
  • built-in lightning and surge protection
  • shielded die-cast aluminum housing
  • 4-15/16"W x 2-9/16"H x 3-3/4"D
  • warranty: 90 days
  • Our 60-day money-back guarantee
  • mast not included
  • RG-6 cable is recommended

Channel Master 7777 Reviews

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Deep Fringe Improvement

Written By Ken C, California on Sunday, November 08, 2015

Crutchfield Customer Review (What's this?)

I live 103 miles from Sacramento (178 degrees line of sight according to TVFool) but only 15 miles from from a strong local transmitter at 318 degrees. I was concerned that this amplifier might have overload problems because of the nearby station. I connected it to a small Winegard FreeVision just for a test and got such great results I kept the FreeVision instead of an 8-bay bi-directional antenna I had also purchased. I was able to mount the power inserter outside just 25 feet from the antenna because I had an outlet out of the rain. Went to a 2 port splitter and 2 TV sets. I love this setup. I get 46 clear strong channels at 178 degrees with decent reception from some of the local stations from the back side of this antenna. The 7777 works perfectly I'm glad I bought this instead of the lower power 7778 because at 103 miles I need all the help I can get and the local station is causing no overload problems at all. I have a total of 46 clear channels with 26 left after I deleted the shopping, religious, and foreign language stations. I'm enjoying the Raider's game on channel 13.1 from Sacramento right now with an 80% signal strength and crystal clear HD, much better than DirecTV and it's free! Can't ask for anything more. One last thing, I bought the 7777 from Crutchfield even though I paid $5.00 more because the picture showed an amp which was all metal, no plastic on the front. Verified with Crutchfield chat, came as pictured. Love it, thanks Crutchfield!

Pros: Works perfectly, easy to mount, no overload problems for me at least from a nearby station. Very strong signal, makes my urban antenna into a fringe antenna. Looks much more quality than the Winegard and others I looked at.

Cons: None

Channel Master Titan 2: Amazing

Written By Bruce M, New Jersey on Thursday, November 05, 2015

Crutchfield Customer Review (What's this?)

I live in New Jersey, 20 miles from NYC, and got NBC great with a Channel Master rooftop antenna, FOX was spotty, and ABC and CBS didn't come in at all. We live just over a hill and I think that's why our reception was shaky. I just installed the Titan 2 and went from about 15 channels to 53 channels and all the major networks come in perfectly. I can't tell you how happy I am not to have to deal with pixelation.

Pros: Worked fantastic. Easy to install in my circumstance but I did need to go on the roof.

Cons: None

Channel Master 7777

Written By Rob A, Georgia on Saturday, October 10, 2015

Crutchfield Customer Review (What's this?)

The antenna amplifier is small and simple to install. It strengthened the signal on some channels which I couldn't watch before because the signal power an quality was too low and the picture would break up.

Pros: Small easy to install..

Cons: Only comes with one coax cable which is used to provide power via a supplied splitter but you'll need one additional cable.

Channel Master 7777

Written By Bill, Virginia on Sunday, September 27, 2015

Crutchfield Customer Review (What's this?)

I am located in a fringe TV signal area between Richmond, Va TV stations and Charlottesville, Va TV stations. My reception would fade in and out at times on all stations. I made signal strength measurements on all the stations before installing this amplifier. After installing this amplifier, I made signal strength measurements again. There was quite an improvement in the signal strength on ALL stations. TV stations are now NOT pixelating(fading in and out) at all. I have even picked up a few TV stations that I had not been able to receive before installing this amplifier. Quite possibly, if I re-aimed my antenna in the direction of the Washington D. C. TV stations(which is in the opposite direction of my antennas current aiming), I might receive some of those stations. Seems to be a good product if it lasts. My only concern is the Channel Master 90 day warranty. I have another Channel Master product with the same 90 day warranty. Although it has continued to work well for about two years, I don't know why Channel Master doesn't give one year warranties on their products. The 90 day warranty makes me wonder if Channel Master is not sure of their products durability.

Pros: Does what it is advertised to do. Easy installation.

Cons: Why only a 90 day warranty? The warranty should be a one year warranty if it is that good of a product.

antenna craft-3 channels CM 7777-58 channels

Written By Cable's_a_ripoff, Ohio on Sunday, September 13, 2015

Great preamp. I previously owned the 7778 and it worked well enough but died after a couple of years and replaced it with antennacraft unit. Bad move. The 7777 works wonderfully pulling in 58 channels and holding them very well.

Pros: Work great

Cons: Wish is was less costly to buy.

Excellent product for "cord cutters"

Written By JoelD, North Carolina on Monday, August 24, 2015

Crutchfield Customer Review (What's this?)

I have now installed three of these amps in different installations. One has been in place for four years, and two others just this past month. The ChannelMaster 7777, in conjunction with an antennae like the ChannelMaster 4228HD does a great job of creating a whole-house feed for OTA TV. Take this, feed the original cable distribution splitter in your legacy interface box, and you'll be pleased. The two installations I just set up were at the NC coast. Several of the stations I wanted to pick up were 50 to 70 miles away (fortunately at roughly the same vector for antennae position) and this amp is a key part of success there. As expected, range in the coastal plain is better than range in the piedmont with urban centers around, but this amp works to bring in stations 40+ miles away there.

Pros: Simple to install, and it works. Power injection can be from source quite a distance from the amp.

Cons: None noted.

Channel master 7777

Written By Rcamil, Big rapids mi. on Monday, July 06, 2015

Crutchfield Customer Review (What's this?)

Easy to read instructions and went up without a hitch.

Pros: Really made a big difference. Got a lot more channels than with just the antenna.

Cons: None yet.

Channel Master 7777

Written By Brian, Indiana on Monday, June 29, 2015

Crutchfield Customer Review (What's this?)

The old preamp we had dead after a storm. Decided to go with the Channel Master 7777 this time around being the old one is discontinued. What a mistake. This pre amp is garbage and a waste of money. We now 6 channels where before we had 40 channels. I would hope that Crutchfield would have better products than this.

Pros: N/A

Cons: Everything.

CM 7777 Review

Written By anonymous, Pennsylvania on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

Works exactly as advertised. Increased my channels received from 21 to 52. It is important to note when installing amp, that it needs to be close to the antenna with a very short coaxial cable connection, or your signal will be lost. Originally, I had the amp 20 ft (connected with coaxial cable) from the antenna, for testing purposes, and I had zero channels. I then tested the antenna on its own and was able to receive 21 channels. Then retesting the amp with the antenna with a very short coaxial cable (from the antenna to the amp) and I was able to receive 52 channels. I am about 50 miles from the majority of towers with mountains in the way. There is also a tower due east of me for local news. Amp was able to get all stations without blocking the closet tower signal.

Pros: easy to install. increases amount of channels received by a landslide. Goodbye Cable!

Cons: must make sure amp is connected with short coaxial cable to antenna, or signal will be lost.

CM 7777 Defective Out of the Box

Written By Leighton, Minnetonka, MN on Thursday, April 23, 2015

Crutchfield Customer Review (What's this?)

This product was defective out of the box. No excuse for this kind of quality issue. Install time and cost exceed any return/replacement benefits.

Pros: Excellent customer service, but still need a working product to install.

Cons: Time to replace and reinstall is prohibitive.

Works great until warranty runs out

Written By Paul, afton, Virginia on Tuesday, April 21, 2015

This worked Great... for the first 90+ days, then the warranty ran out and it quit. I took it down and it looks brand new - it just doesn't work. Would buy another if I thought it would last beyond 100 days...

Pros: Really pulls in the distant stations

Cons: Didn't last longer than the warranty.

channel master 7777

Written By neil, Naples Fl on Tuesday, March 31, 2015

Crutchfield Customer Review (What's this?)

works great dose the job

Pros: For the money dose a good job

Had to be wired separately

Written By SylviaS, Fayetteville, NC on Thursday, March 12, 2015

Crutchfield Customer Review (What's this?)

installed incorrectly & get as many channels without it as with it, still get loss of signal in good or bad weather

Cons: separate wire & another hole drilled in the floor

Performs as Advertised

Written By Hup, Massachusetts on Saturday, February 21, 2015

Crutchfield Customer Review (What's this?)

Installed long range directional antenna CM3020 and the CM7777 in my attic. (Not the best area for reception I know, but what I could do during this snowy winter) Before the pre-amp was installed the signals were marginal and image pixelating. Afterwards, I have 30 channels or so, most of which are in the 80% + range of signal strength. Works great for my situation.

Pros: Amplifies a weak signal well. You'll need a good antenna to make sure the pre-amp has something to work with.

Cons: Cost a bit more than the average pre-amp

Gets the job done

Written By Sam, Central Texas on Monday, January 26, 2015

Crutchfield Customer Review (What's this?)

I installed the Channel Master 7777 preamp with a Channel Master 4428HD antenna to replace an old antenna and amp. It was a snap to install and does a excellent job of receiving the Abilene TV channels that I wanted. I am about 70 miles from the transmitter.

Pros: Easy installation. Excellent reception.

Cons: None.

worked great, for 6 mos

Written By Mike, Pennsylvania on Monday, January 19, 2015

Crutchfield Customer Review (What's this?)

Right out of the box this and a cm4228 worked great together. Now that it is below freezing out and my antenna and preamp are 30 odd feet in the air the preamp has died. It was a slow death over the past week. A week ago 20 odd channels. Today 2. All voltages from power inserter read correctly. I suppose it is the preamp itself. Bypassed the preamp and power inserter today and got most channels back. Has tons of bad reviews out there. Most speak to a lack of reliability. I wish I would have seen them prior to purchase. Never again channel master

Pros: great while it worked

Cons: Dead, no longer working

Helps Reception

Written By Dave J, Virginia on Monday, November 10, 2014

Without this amp I was receiving 3 of the local channels with a Channel Master antenna. After installing the 7777 I am receiving all the local channels here in Cville Virginia and the Richmond stations 70 miles away. The picture is crystal clear and in HD. Easy to install and after 2 months I have had no problems with it. I am running three TVs with this set-up with no drop in signal. This is done with a 3 way Splitter by Holland with a signal pass and the other two with a built in signal blocker. Got rid of my 90 dollar a month Satellite bill.

Pros: Easy install

Cons: A little pricey

So Far So Good

Written By vinnie_86, Southern California on Thursday, August 14, 2014

Crutchfield Customer Review (What's this?)

This amplifier did boost my channels from around 85 to close to 124. I'm still getting some static on a few stations, but I might just need to move my antenna from behind the stucco in my garage. I'll update after I move it.

Pros: Easy installation, boosted the signal as advertised.

Cons: None yet.

MY Bad

Written By Brian, Pittsburgh, PA on Monday, July 14, 2014

Crutchfield Customer Review (What's this?)

I though I needed a pre amp because only the closest tv to the antenna was receiving a signal. This devise only made things worse. I live in an area that is close to the broadcast towers, less than 20 miles. In reality what I needed was an in line signal amplifier because of multiple spitters and long cable length. I returned this and got the channel master 3414. Now all of my televisions receive the same number of channels, approx. 40 channels.

Channel Master 7777

Written By Ken, Ga on Thursday, June 12, 2014

Crutchfield Customer Review (What's this?)

Works well. we are about 30 miles from station.

Met expectations

Written By mfmAudioSince60s, Manassas, VA on Thursday, June 05, 2014

Crutchfield Customer Review (What's this?)

Very glad I ordered the high gain version and not the medium one. We live approximately 35 miles outside the DC area. I have a Channel Master antenna mounted at the ceiling of finished attic space (3rd floor). Very long cable run from the antenna to the TV in the family room on 1st floor. No splitters used. Without the amp I get 16 channels many with poor HD quality. With the amp I get over 40 channels and the HD quality is excellent. Have not tested this during heavy rain yet.

Pros: Good instructions. Easy to install. High gain with no noise.

Cons: Housing of the amp is very warm during operation. Not sure if this is normal.

Good or great, I'm not sure

Written By BillD, Joaquin, TX on Sunday, May 11, 2014

Crutchfield Customer Review (What's this?)

This amplifier was bought as an upgrade from a another brand as an attempt to bring in more Shreveport, LA stations from about 60 miles away. The original one was paired with a relatively new, huge antenna, but some of the desired channels were still weak and inconsistent. The RS amp had some nice features too, such as 2 outputs and an adjustable gain, but all evidence said the channel master should be better. Also, based on surprising information that all Shreveport stations are now UHF, I bought a much smaller 91XG UHF antenna to try. I tried multiple configurations where I mounted the 91XG about 5' below the HD1850 and tried each with both amps. Results: Best Combination - 91XG and the 7777. Second best, but only by a hair, was the 91XG and RS amp. Strangely, the HD1850 and the 7777 were apparently totally incompatible as only 3 out of 16 stations could be received. I double checked this by switching the connections back and forth. This really surprised me. The 91XG, however, with the amp, performed better than any antenna/amp combo from this location in 40 years. Later in the evening we were even picking up Alexandria, LA, an unbelievable 120 miles to the southeast AND THE ANTENNA WAS POINTED NORTH! Also, I must say, thank you Crutchfield for great service!

Pros: High quality build. Great reception.

Cons: May not be compatible with all antennas.

Channel Master 7777

Written By Anonymous, millersville,md on Sunday, April 20, 2014

Crutchfield Customer Review (What's this?)

I Have used this product many times...very satified


Written By Bill, Wallace, NC on Saturday, April 19, 2014

Crutchfield Customer Review (What's this?)

I received the same number of channels before and after the installation. However, I had por reception on some channels during the evening and on clear days. The amplifier solved all the reception problems. I split the signal in the house to peer 5 televisions with no loss of signal quality.

Pros: Easy to install.

Cons: None.

channel master 7777

Written By Scott D, Granville, NY on Thursday, February 20, 2014

Crutchfield Customer Review (What's this?)

works really good, get several channels, but had to send the first one back for not working, costumer service was top notch, fast shipment

Great TV Amp

Written By am, Spartanburg, SC on Friday, December 06, 2013

Crutchfield Customer Review (What's this?)

From inside the attic, I tried the Mohu Sky (with Jolt) before this amp with the CM-2020 antenna. They both pulled in about 20 channels (and I'm 30-60 miles from most towers) - so I was impressed with both set-ups. However, the CM-7777/CM-2020 combo pulled them in STRONGER. I mean, no glitches -even during thunder storms with HEAVY rain. I was impressed. I returned the Mohu. I think if I was closer -either would have been a good fit. But if you're on the fringe...spend the extra $20 on the CM's- you'll thank yourself later.

Pros: Pretty easy to put together (mostly just unfolds)

Cons: Big footprint (7 feet by 5 feet by 2 feet)

Channel Master 7777

Written By KBL, Mendocino Co., CA on Wednesday, December 04, 2013

Crutchfield Customer Review (What's this?)

Living in a rural wooded area 150 miles plus distance from broadcast towers this was a solution to improve signal strength so that we can at least get local news from the city. It has done the job well.

Pros: Easy install, a no brainer!

Cons: Climbing up to install at antenna site

Old reliable

Written By SamC, North GardenVA on Monday, December 02, 2013

Replaced a Winegard that lasted less than 3 years. Good ol' Channel Master!

Second unit works

Written By DL, Kokomo, IN on Monday, September 16, 2013

Crutchfield Customer Review (What's this?)

The first Channel Master 7777 worked fine for approx. 3 hours. Called Crutchfield customer service and they were very helpful. They sent me a new unit immediately and had me return the old unit after I received the new unit. The second unit has been working fine in my attic for approx. 3 weeks in very hot weather with no problems. I gave this pre-amp 3 stars because the first unit was defective. I give Crutchfield customer service 5 stars for their outstanding support after the sale.

Pros: CM 7777 per-amp works great. Really improved the signal quality of all 25 channels on both TV's.

Cons: First unit failed after 3 hours.

Channel Master 7777

Written By Larry, Morgan County, Colorado on Tuesday, August 27, 2013

Crutchfield Customer Review (What's this?)

The pre-amplifier(channel master 7777)) is working well for this fringe area 100 mi. east of Denver's Lookout Mtn. Night reception is far better than daytime under the current atmospheric conditions and temperature( scanned 60 digital channels but will block duplicates and spanish only). This installation is on a mast above 4 - 10' sections of tripod tower. Will rotate the antennae from the 30' of mast extentions on my cone bearing w/ race to check out reception from other directions for daytime use.

Pros: The parts arrived promptly to repair the lightning damaged antennae and 2 calls into the tech department gave me good suggestions for finishing this project.

Performs OK

Written By Buddy, Gum Spring, VA on Saturday, July 27, 2013

Crutchfield Customer Review (What's this?)

I live about half way between Richmond and Charlottesville, VA. I have a 4228HD Antenna/with rotator up about 25 feet, but have heavy tree coverage. Without the CM-7777 amp I pick up the 3 strongest Richmond Stations (TV 6, 23 and some times 8), and 3 Charlottesville stations (19, 29, 41). With the CM-7777 amp installed, the signal level on these stations has increased somewhat and occasionally, I can pickup several additional stations (Richmond TV 12 and 35 and 27). Initially, I was considering purchasing the CM-7778 amp; glad I didn't buy it. Overal, there is signal improvement with the CM-7777, but not what I was hoping for. I believe an antenna height increase would have been more beneficial.

Pros: Easy Installation.

Channel master

Written By Anonymous, Dartmouth mass on Monday, May 13, 2013

Crutchfield Customer Review (What's this?)

Works well no complaints

Pros: Simple to install

Cons: Should be included with antenna

Did make it better

Written By Mitch, Webster Wi. on Sunday, May 05, 2013

Crutchfield Customer Review (What's this?)

Still only received 2 stations , this did not help bring in more, but did make the stations a tad clearer.

Pros: easy to hook up

Cons: didn't do what I expected it to do

Best to date

Written By Dave, Port Angeles, WA on Thursday, March 28, 2013

Crutchfield Customer Review (What's this?)

Used as a replacement upgrade for another brand with similar boost db levels claimed. The channel master provided a couple of new channels and eliminated the pesky drop outs on the prior received channels.

Pros: more channels and far less drop offs in signal performance.

Cons: None.

Channel Master cm-7777

Written By Jim, Bardstown Ky on Saturday, August 18, 2012

Crutchfield Customer Review (What's this?)

The cm-7777 replaced antenna amp that I think lighting got to. The old amp pick up 32 channels and the cm-7777 pick up 40. Most of my neighbors have dish or cable. As far as I and 2 other neighbors who have regular antenna, our HD picture is better by far than any of theirs. They have more channels to watch and still say there is nothing on TV they want to see. All is working great.

Pros: Easy to installed

Cons: n/a


Written By Bob, Youngstown Ohio on Tuesday, October 18, 2011

Crutchfield Customer Review (What's this?)

Great amp. I paired it with the channel master 4228 antenna and i am picking up 50 channels some up to 55 miles away. Best part about it i tried it in my garage rafters before trying a roof mount and its working great in the rafters so it will stay there for now. Great item.

Channel Master 7777

Written By DennisP, Godfrey, IL on Thursday, May 26, 2011

I use this preamp with a Channel Master 4228HD Antenna about 30 miles out of St. Louis. The weather has to get real bad now before my picture starts to "studder". My signal is always at least 70% or greater.......rock solid.

Reat Device

Written By Alex, Lake Forest, Illinois on Sunday, March 06, 2011

Crutchfield Customer Review (What's this?)

Works thing I would change is the fm trap feature, ie make it more
accessible, You have remove the cover and change it which is a pain. If you want good
fm reception you have leave in the "out" position, having it in all but removes fm
reception...Beside I don't think fm interference ..the herringbone pattern on some
channels is visible anymore on HD ditigals channels. So remember if you are going to
use your antenna for fm reception change the fm trap to out before you install it otherwise
you will have climb on the roof and change it later. Other than that works superbly

Great help in my case.

Written By KC, St. Thomas, VI on Tuesday, October 26, 2010

Crutchfield Customer Review (What's this?)

With my Channel Master 7777antenna preamplifier in combination with my DB8 antenna, Cable suddenly looks inferior.
The proof that it realy works is that I am still discovering "new" channels, I last counted a total of 24 (including sub-s) channels.
The "crowning" is that I now receive WIRS-DT on channel 41, which is listed as being 107.8 miles away from my location. My next system addition will be the Channel Master 9521A Remote Control Antenna Rotor.
I highly recommend the Channel Master 7777 Antenna Preamplifier.

The Best

Written By KJ, Youngstown,Ohio on Thursday, September 23, 2010

Crutchfield Customer Review (What's this?)

I live 65.5 miles from KDKA in Pittsburgh. I have 80% signal! I have 41 channels
total with this preamplifier! POWERFUL!!!!!

Works Perfectly

Written By Nathan, Brockport, NY on Monday, April 26, 2010

I have a roof antenna (equivalent to CM3016) that normally works well, but when we have rainy weather or thunderstorms, FOX has trouble coming in. I am 18 miles from our broadcasting towers, across relatively flat land, but I have a long cable run and have it split 4 ways for TV and Radio. So, I decided to incrementally upgrade my antenna system starting with what I felt to be the most likely to improve my signal given all of the mentioned conditions. This preamp has worked wonderfully. During bad weather FOX will still break up occasionally, but the preamp delivers a strong consistent signal to my TV's tuner. It seems that the preamp doesn't really improve your reception like a bigger antenna would, so much as it overcomes all of the noise in your system to get the most out of your existing antenna. If you are serious about OTA TV, a preamp is mandatory equipment.

Works Well for Fringe Areas

Written By Robert, Mtn Home, ID on Sunday, October 25, 2009

Crutchfield Customer Review (What's this?)

This unit boosted the signal strength on a new HD antenna from 23% to 78%. It is rather touchy about it's power feed. It doesn't like the power unit being downstream of a splitter or lightning protection unit.

Also had to do a cold reset of my D-A converter several times to fix a signal overload problem on one channel.

Channel Master 7777

Written By Jeff, Middlesex, NY on Tuesday, April 07, 2009

Crutchfield Customer Review (What's this?)

If you are looking for an excellent Preamp and are kind of on a tight budget, this is the preamp for you. Got mine in 3 days(weekend order), installed it on my cheapo Uhf/Vhf and my new ota antenna's and had 13 digital and 9 analog stations in minutes. Before I bought this preamp I had 3 analog and no digital stations. and all stations come in CRYSTAL CLEAR. Fantastic!!!!!!!!!!!!!!!!

Channel Master 7777

Written By David, Hillsborough, NC on Monday, February 02, 2009

Crutchfield Customer Review (What's this?)

Easy to install. Took about 20 minutes including putting up and putting away the ladder. Only additional item needed was a 6' outdoor coax cable. Increased my signal strength by 1-2 bars on my Samsung TV's signal strength indicator.

Works great

Written By Leon, Minden, La. on Thursday, January 22, 2009

Crutchfield Customer Review (What's this?)

I have a Winegard PR 8800 antenna that I hooked the cm7777 up to. I live in a national forest 38 to 40 miles from the TV towers in my area and I have 30 foot trees 20 feet from my antenna. I have seen a jump of 20 points on my signal meter for each channel (0 to 100 meter). I even picked up another channel that I was not recieving before. On Feb 17th LPB will switch thier broadcast in our area to a taller tower with 3 times the power so I know I will pick 3 more stations. I pick up 13 digital channels now and I do not have any problems with dropouts any more. All my stations are 263 to 268 degrees from me and that is lucky to have them all that close together. Before the cm7777 to recieve two of those stations I had to turn the antenna slightly. Now they just come in without having to tweek anything, so it is not so directional anymore. I would definately recommend this product to anyone out in the boonies like I am.

Digital Signal Amplifier

Written By kyle, Atlanta, GA on Wednesday, December 10, 2008

Crutchfield Customer Review (What's this?)

I purchased this booster with the 4221 antennae. I already owned a 20 db amplifier connected to a 12' antennae in my attic. My original antennae out performed the 4221 in the attic, but the gain in signal from the 4228HD was far superior to the older 20 db unit. I am able to receive a total of over 40 channels now (~20 digital). I would recommend the 4228HD to anyone.

Good product

Written By Charles, Augusta, Ga on Tuesday, November 18, 2008

Crutchfield Customer Review (What's this?)

AMP performed as advertised. Based on antennawebs recommendation, I indeed needed an amp to pick up the extra channels. The AMP allowed me to receive 4 more channels ( all digital ) than without.

Followup to earlier review

Written By Thomas, Elkhart Lake, WI on Wednesday, October 15, 2008

Crutchfield Customer Review (What's this?)

As suggested in my earlier review, I've now installed a second CM 7777 on a north-facing (Green Bay market) antenna mounted up in my garage rafters. I was alarmed when the reception was actually worse. Then I pulled out the original 85 ft run of 15-yr old RG-58 cable and replaced it with RG-6. Voila! Problem solved.

I then added another amp (an old amp I had laying around) to my south-facing (Milwaukee market) antenna (also up in the rafters) on the theory that I could combine the two signals (with a 2-1 splitter/combiner and no A-B switch) and let the digital receivers sort out the signals. Ta-dah! Two TV markets! This wouldn't work on analog, but it does perfectly on all five digital receivers I have (2 HDTV's and three satellite receivers).

Not quite as good reception as my mast-mounted rig, but no rotor to deal with. If it works as well this winter when the snow flies, I'll take down the mast rig and use that CM 7777 to replace the old amp.

Oh, and you don't need a weather-proof amp if you're willing to run AC power up to the rafters for the amp, but the CM 7777 is still the most powerful on the market.

Awsome Product

Written By Donky353, Grand Rapdis MI on Friday, October 10, 2008

Crutchfield Customer Review (What's this?)

This is the best booster on the market. I have tried several others and nothing even comes close to the quality of this model. Woudl recoment to anyone who is using an antenna for tv

Superior product

Written By Craig, Manchester, NH on Tuesday, October 07, 2008

Is a superior amplifier. Allows the power supply to be safely stored away from the amp, which should be near the antenna. Powerful enough to drive all of the coax in my house. Without amplification, I was able to tune 3 channels. After adding this, I was receiving 24. Well worth the investment!!

Significant digital reception improvement

Written By Thomas, Elkhart Lake, WI on Monday, October 06, 2008

Crutchfield Customer Review (What's this?)

I installed a large mast-mounted UHF/VHF antenna according to antennaweb's recommendations. I'm deep fringe, but with no interference sources. Found I couldn't get certain digital channels, so I
went back to antennaweb to find in the small print that they also recommend an antenna amp for me. Bought a CM 7777 from Crutchfield and it made a huge difference. Now get every channel (including 37 digital). Most noticeable is that the directional sensitivity is much lower. I'll buy another now for another antenna I have mounted in my garage rafters.

Simple and Effective

Written By Robert, Upstate NY on Sunday, October 05, 2008

Crutchfield Customer Review (What's this?)

I was concerned about installing this because the instructions are not very clear. But I found it easy, what you have to do is connect the power module into the co-axial wire as close to the first TV as possible and the connect the pre-amp to the antenna by using a short co-axial jumper mounting it to the mast. No other wires required. Simply put the power module uses the co-axial wire to send power to the pre-amp, which boosts the signal and sends the "boosted" signal back down the to the TV.

It increased my signal at the TV on average from 3 bars to 7 bars (out of 10). Now when a storm comes in I no longer lose the signal. I am very happy. I just wish the instructions explained the setup better.

DUD quickly replaced

Written By Brad, Fauquier County, VA, in the forest on Tuesday, August 12, 2008

Crutchfield Customer Review (What's this?)

This amp was purchased to replace one destroyed by lightning. The first 7777 didn't seem quite right, but I wasn't sure. On day 3 the UHF side died. (VHF kept going.)

Been buying Channel Master (CM) stuff for 40 years and NEVER had a problem before. Internally it lacked the beautiful workmanship US is famous for. Looked like home-built kit project!

Crutchfield responded aggressively - without having to pay extra or return dud first, I had another 7777 in a couple of days! Second unit is in service 8 weeks now...

Without amp, I barely get analog VHF and no UHF. With good amp, I get over 20 Digital UHF stations, and analog VHF stations look excellent too. (I'm using new balun and RG6 Quad Shield coax; an old rebuilt VHF/FM/UHF antenna & a rotator; 2 DTV converters (watch + record); a Sony 27" standard def TV. This combo works really well together.

BTW, the 7777 works much better than the old amp ever did!

Channel Master 7777

Written By Olek, Pittsburgh, PA on Thursday, May 01, 2008

Crutchfield Customer Review (What's this?)

Nice, solid amplifier. I am living behind the huge hill, so reception is problematic.
Amplifier boosted signal strength by 10-20% and SNR by 2-3 db, and made couple of weak channels to come through just fine.


Written By Ron, Webster, NY on Tuesday, April 01, 2008

I bought the Channel Master 4228 antenna and hooked it up inside the house. It brought one of my channels to 100%, the second one to 90%+ but the third and fourth ones were still not coming in effectively. I purchased the Channel Master 7777 to see if that would help. I hooked up the antenna once again when I received the amplifier and I was getting 60% reception on the worst channel. I plugged in the Channel Master 7777 and it took all of the channels to 100%.

Great product!! I will now install the antenna in the attic with the amplifier and I think my reception problems are a thing of the past!!

Works Great

Written By Travis, Lexington, KY on Monday, February 18, 2008

Crutchfield Customer Review (What's this?)

It's difficult to tell exactly what made the difference since I purchased a new digital TV, the Channel Master 4228 antenna, and this amplifier all at the same time. A website indicated there were five digital channels in my area. When all was hooked up, the TV found 15 digital channels. All come in crystal clear and I get the HD broadcasts for free. With most primetime broadcasts in widescreen HD and the other information embedded in the broadcast (like what's coming on a particular channel for the next few hours) I've abandoned my plans to get cable or satellite.

Channel Master 7777

Written By John, Leander, TX on Sunday, February 10, 2008

Crutchfield Customer Review (What's this?)

There are 7 analog (1 VHF, 6 UHF) and 9 digital channels available OTA in my area. Transmitters are about 20 miles away, terrain in between is moderately hilly. Using Channel Master 4228 antenna mounted inside attic feeding 4-way splitter followed by RG6 cable runs averaging 40 feet.

With Channel Master 7777 installed but unpowered:

Analog: 2 channels clear, 3 channels watchable but slightly grainy, 2 channels too grainy to watch.

Digital: 5 channels lock with 3 bars signal strength (out of 5 bars possible), 4 channels fail to lock.

Note: Above performance very similar to using amplified set-top antenna as signal source for single TV.

With Channel Master 7777 on (FM trap IN, UHF/VHF input COMBINED):

Analog: All 7 channels clear.

Digital: All 9 channels lock, 8 of them with 5 bars signal strenth, 1 of them with 4 bars.

Couldn't be happier! Highly recommended!

Great product!

Written By CvilleHoldem, Ruckersville, VA on Monday, September 17, 2007

I bought the Channel Master 4228 antenna and the 7777 amplifier at the same time. I installed the antenna first and it worked pretty well all by itself - although a few times during the USC-Nebraska game it went in and out a bit. I did a signal meter test on all the stations I could pick up. The best was 100% while the worst was 23%. Then I installed the amplifier and the the 23% signal became 74%! My primary market is Charlottesville (16 miles away) and all of the stations there come in beautifully. I am also getting CRYSTAL clear reception from all of the Richmond stations as well (60 miles away.)

I am very pleased with the Channel Master 4228/7777 pre-amp combo.

Provides a significant boost for both analog and digital signals.

Written By Jamie, Stevens Point, WI on Tuesday, August 21, 2007

Crutchfield Customer Review (What's this?)

Provides a significant boost for both analog and digital signals.
I live in Central Wisconsin, and mounted my Channel Master 4221 antenna in the attic. At a distance of approx. 35 miles south of the stations in our area, I ordered the Channel Master 7777 pre-amp to boost my signal without introducing more interference so that I could receive a mid frequency VHF channel (7) that broadcasts HD. Even though I am using a UHF antenna, this pre-amp accomplished the goal of boosting the signal to the point that I now receive the VHF channel as well as an analog channel (13 out of Eau Claire) which is approx. 100 to 110 miles away! This product is well built and is certainly worth the money. I would recommend this to anyone who is having issues with digital signals due to being on the fringe of the reception area, or who is attempting to pull in analog stations from greater distances.

Channel Master 7777 works wonders!!

Written By Tom, St. Croix Falls, WI on Sunday, July 08, 2007

Crutchfield Customer Review (What's this?)

This is a completely awesome product.
I am about 45 miles away from HDTV towers and before buying this product I could only get about 2 stations some of the time. I temporarily hooked it up in my basement so I wouldn't have to climb up in my attic to get to the antenna and then hooked the plug in amp to the TV and immediately pulled in all stations out of the Twin Cities with about 80% strength or more! Simply amazing! Highly recommended!!

Channel Master 7777

Written By Vince, Cincinnati, OH on Saturday, June 02, 2007

Crutchfield Customer Review (What's this?)

I recently bought an HD capable TV and decided to dust off my attic antenna connection to see what I could get over the air. I run three TV's off this antenna, but only one is HD. The analog signals varied from good to very weak. I was having problems with a couple of the digital signals (hesitations and some reception blips). I installed the pre-amp and was amazed at how good the reception improved. I had one analog channel in my office that would not hold horizontal tracking. Several others were quite fuzzy. They come in very clear now. The digital signals on my HD capable TV come in slightly better. I still have one 25-30 ft run of outdated coax to replace to that TV (I ran the original coax 20-25 years ago). The problems have been reduced enough that I'm not in a hurry to do that.

The good news is that my wife can now watch her shows in HD and gets a good enough analog signal to tape her soap on the VCR. We've dropped our cable and are happy with what we get over the air.

Didn't help me

Written By Crutchfield, N.E. Ohio on Sunday, December 03, 2006

Crutchfield Customer Review (What's this?)

I've been trying to get a UHF Channel about 60 miles from me. I can get it, barely, but it is very weak ( snow etc) My Antenna is in the attic of a Ranch style home. I figured this Amp would at least clean up the pic somewhat but it didn't seem to do anything. In fact, it may have been worse. Hard to tell but close...

Then I remember trying these Amps years ago before Cable and experienced the same results. So, maybe it's my setup, don't know. But it just didn't help me. The other reviewer seems to like his so it may be a hit or miss thing. I will be returning mine and go for a better Antenna and setup.

This is a great low noise amp!

Written By no, chapel hill, nc on Thursday, October 26, 2006

In years past, using an inline TV amplifier was sort of like turning the knob on a set top antenna - you always wondered if it was actually doing anything because it wasn't at all obvious by looking at the picture. Well times have changed and so has the world of TV inline amplifiers. The Titan 2 model 7777 amp is not like your fathers TV amp. When you plug it in, voila. Suddenly you can see the digital stations that weren't there before. How about the snow on an analog station? Gone. Expensive? Not bad. This little number pretty much does what it claims. In this day and age, it doesn't get any better than that.

Hands-on research

What's in the box?

Download owner's manual

  • CM-7777 Mast-mounted antenna preamplifier
  • AC/DC adapter (APA1260315U indoor power supply)
  • Power Inserter (PCT-MPI-1G)
  • 6' Coaxial cable (with threaded "F" connectors on each end)
  • Large waterproof weather boot (for connection at antenna)
  • 2 Small waterproof weather boots (for connections at preamplifier)
  • U-bolt Assembly (with 2 star-washers and 2 hex nuts attached)
  • 1 Self-tapping screw (for mounting power inserter)
  • Instruction sheet (Eng/Span/Fren)
  • Technical support contact sheet

Product Research


Overview: The Channel Master Titan 2 Model CM-7777 Mast Mounted Antenna Preamplifier provides amplification for HD and digital signals received by your antenna. Preamplifiers can also be used when distributing the antenna signal to multiple TVs, as splitters reduce the signal strength at each output. The preamplifier comes with an indoor power supply, which connects via coaxial cable.

Signal Gain: The CM-7777 is a high gain, low noise preamplifier to be used in weak signal areas to boost the antenna signal to a viewable strength. The preamplifier provides 30 dB of signal gain on both VHF and UHF bands, at frequencies between 54 MHz and 1002 MHz.

Warning: Because of the high gain output, the CM-7777 is recommended for applications where ALL broadcast towers are 80+ miles away. Just one high power signal or broadcaster in close proximity can cause over-amplification, which can result in the loss of reception. For 98% of consumer applications, the CM-7778 Medium Gain Preamplifier is recommended.

Switchable FM Trap: The amplifier has an FM trap to block FM signals to prevent them from interfering with the TV signal. If you wish to unblock the FM signals, you will need to remove the cover, held in place by 4 Phillips-head screws, and set the switch to "Out".

Case: The CM-7777 features a rugged, outdoor-rated housing that can withstand temperatures up to 140°F. The preamplifier mounts to the antenna mast with the supplied U-bolt assembly just below the antenna. The unit mounts with the connections facing downward to keep moisture out of the housing and the connections dry.

Note: The preamplifier and supplied U-bolt assembly are designed for use with antenna masts up to 1-3/4" in diameter.

Connections: The CM-7777 has two F-type 75-ohm connections at the preamplifier: a combined VHF/UHF input, and an output/power connection. The indoor power supply (AC adapter) connects via coaxial cable, and includes a power inserter to energize the mast-mounted amplifier along the cable.

Dimensions (Preamplifier):

  • Width: 4.904"
  • Height: 2.54" (without cables connected)
  • Depth: 3.733"

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