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Channel Master 7778

Medium-gain mast-mount UHF/VHF TV antenna preamp

17 Reviews | 1 question - 6 answers

Item # 6597778

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825 Gardens Blvd

109 South Carlton

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Our take on the Channel Master 7778

The 7778 is part of Channel Master's high-performance Titan 2 series of mast-mounted preamplifiers. Its low-noise, medium-gain design can solve a number of reception problems, and is especially effective for long-range "deep-fringe" applications used in combination with Channel Master's 4228 antenna

The 7778 is part of Channel Master's high-performance Titan 2 series of mast-mounted preamplifiers. Its low-noise, medium-gain design can solve a number of reception problems, and is especially effective for long-range "deep-fringe" applications used in combination with Channel Master's 4228 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 7778's amplifier module, and another RG-6 cable from the amp to the 7778'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 amplifier module and indoor power supply
  • medium-gain, low-noise operation for deep fringe reception
  • compatible with both digital and analog TV signals
  • amplifies VHF (channels 2-13) and UHF (channels 14-51) signals
  • gain: 16 dB
  • noise: typically less than 2 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
  • warranty: 90 days
  • Our 60-day money-back guarantee
  • mast not included
  • RG-6 cable is recommended

What's in the Box:

  • CM-7778 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

It does a great job, but I gave it 4 stars because I think there should be easier access to the FM Trap, you might want to change the setting later, you don't want to be climbing on the roof to change it.

Alex, Lake Forest, IL


Channel Master 7778 Reviews

Average Customer Review(s):

(17 Reviews)

Channel Master 7778

Anonymous from Topeka, KS on 10/3/2017

Crutchfield Customer Review (What's this?)

Don't work could only get one chanel . Removed from system and get a lot more stations. How do I send it back for a refund.



Crutchfield response on 10/4/2017 This customer contacted our Customer Support team and set up a return. Whenever you are not completely satisfied with anything you purchase from Crutchfield, please contact our Customer Support team at 1-800-955-9091. Purchases from Crutchfield can be returned or exchanged within 60 days of the purchase.

Does the job very effective

Alex from Lake Forest, IL on 9/27/2017

Crutchfield Customer Review (What's this?)

It does a great job, but I gave it 4 stars because I think there should be easier access to the FM Trap, you might want to change the setting later, you don't want to be climbing on the roof to change it.

Pros: very effective

Cons: needs easier access to FM trap.

Channel Master 7778

Joseph from Pine Bluff, Ark on 8/1/2017

Crutchfield Customer Review (What's this?)

IT did not help our tv reception-we may have hooked it up wrong.

Pros: good customer service on order and return

Cons: did not work

Crutchfield response on 8/2/2017 Joseph contacted us and set up a return. Purchases from Crutchfield can be returned or exchanged within 60 days.

Channel Master 7778

Mark from Altoona, PA on 1/2/2017

Crutchfield Customer Review (What's this?)

Made the difference between 7 channels and 13 channels OTAKU

Pros: Easy to assemble, good picture diagram, works as advertised, no fluff.

Cons: None that I can see

Channel Master 7778

Anonymous from Elkhart, IN on 12/19/2016

Crutchfield Customer Review (What's this?)

Easy to assemble. Picture is crystal clear at 50 miles.



Channel Master 7778

Anonymous from Grass Valley, Ca on 12/17/2016

Crutchfield Customer Review (What's this?)

Competitive price, delivered quickly, exactly what i needed. I like the personal touches used in packaging - environmentally conscientious materials, personalized messages from employees. A pleasure doing business with an American company like these guys!



Channel Master 7778

Anonymous from Lexington, VA on 6/7/2016

Crutchfield Customer Review (What's this?)

The product performed exactly like I had hoped. Located about 55 miles from a station in Roanoke, we were having problems with reception. Also, our TV is located pretty far from the antenna, which is on the top of the house (mounted on the chimney). The Channel Master 7778 fixed the reception problems.

Pros: Easy to install if you have electricity inside your attic near the antenna. Instructions were easy to follow.

Cons: No Complaints.

CM-7778 Signal Booster

Jon R from Lancaster, PA on 5/5/2016

Crutchfield Customer Review (What's this?)

My antenna has been up on the chimney mast facing the west wind for two years. Different stations took turns providing degraded signals, it became more weather sensitive. I took a chance on a booster for a 40 plus mile range. It worked as advertised! Also received one new channel, which is a new favorite. Ringo was a big help in my selection.



Works well

Steve from North Carolina on 11/16/2015

Crutchfield Customer Review (What's this?)

Seems to be doing its job! Less channels with out it.

Pros: It works!

Cons: None

Channel Master 7778

viet68 from North Carolina on 9/1/2015

Crutchfield Customer Review (What's this?)

Solved my problem; easy installation; I reccomend Crutchfields quick shipping.

Pros: solved my problem

Cons: no cons

7778 works great

1S1K from Mount Crawford on 5/26/2015

Worked great,had to put amp much further than recommend and still pulled twenty-two channels

Pros: Simple to install


Channel Master 7778

JG from North Smithfield, RI on 9/22/2014

Crutchfield Customer Review (What's this?)

The first one I received was DOA. I wish they would have tested it before leaving the factory-it would have saved me a ton of trouble shooting. The second one worked gaining me a few channels and strengthening a few of the weaker ones.

Pros: gained a few channels strengthened a few weak channels. east to install

Cons: first one was dead-makes me wonder about quality

Good product

Steve from Barboursville, Va. on 7/13/2014

Made all the difference in getting consistent signal from stations about 30 miles away.

Pros: Good product and great Crutchfield service.

Cons: None at this time.

Works great

Rathrbcruisin from Adrian mi. on 10/15/2013

Crutchfield Customer Review (What's this?)

Used this with a new channelmaster antenna and i am getting channels in clear HD. I use this and a rotator and i'm getting channels from detroit toledo and lansing. I did some reviews and this rated very high. If you dont need the more powerful amp dont get it this one works great.

Pros: Cost

Cons: None


Todd from Texas on 10/3/2013

Crutchfield Customer Review (What's this?)

Not hard to install, and did the job I needed it to do.

Pros: It did what y'all said it would do.

Cons: None

works, But

James from Disputanta, VA on 8/15/2009

Crutchfield Customer Review (What's this?)

There is no doubt this pre amp works. I havn't had to use a pre amp for sometime, but though this would help reception, and it did. One thing to mention is that I am also using a distribution amp to send the TV signal to the rest of the house and a garage. At first all went well, but after a day or so the signal strength fell off quite a bit. The answer was to lower the gain of the distribution amp. I don't understand why this did not show up right away.... Also I was dissapointed in the manual that came with the product.



Some improvement

Rob from Eagle, WI on 8/11/2008

Crutchfield Customer Review (What's this?)

Did improve analog reception and digital reception noticeably. Digital still could be boosted some more for consistent reception. I am 30 miles from TV stations




Hands-on research

Product Research


Overview: The Channel Master Titan 2 Model CM-7778 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-7778 is a medium gain, low noise preamplifier to be used in moderate signal areas to boost the antenna signal to a viewable strength. The preamplifier provides 16 dB of signal gain on both VHF and UHF bands, at frequencies between 54 MHz and 1000 MHz.

Note: For areas with weak signal strength, where ALL broadcast towers are 80+ miles away, the CM-7777 High Gain Preamplifier may be 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-7778 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-7778 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"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Worked perfectly in my situation! A roof antenna, four way splitter to the house, three bedrooms and a living room, great reception! "Cut the cord" people,... FREE IS GOOD!! [ James Ken  Jun 26, 2017 ]
added an additional 3 channels with this pre-amp [ Mark  Dec 21, 2016 ]
rural area, local channels partially blocked by hills, need to get "big city" channels. Current equipment beaten up by tree branches, wind and ice through the years. [ Dennis  Dec 15, 2016 ]
I cut the cord. No longer subscribe to cable TV. For the past year! [ Steve  Sep 18, 2016 ]
I bought this product many years back and work very well. I live were there is many pines tress and it is able to boost the signal to receive the local channels. Without it maybe 4 channels with this product a bit over 30. [ Aurelio De  Mar 15, 2016 ]
I needed an antenna amplifier and this one was recommended for my location. [ Evan  Mar 03, 2016 ]

1 question already asked

Yes [ Tim  May 13, 2017 ]
Yes it will. Just make sure the antenna terminates with a 75 ohm F style connection. Your antenna vendor will have a small transformer with one end that connects to the antenna itself, and the other side has the F-style connector for 75 ohm output. [ Philip  May 13, 2017 ]
As long as the antenna will receive Over the air TV stations.. UHF and VHF signals. It works great ! [ Larry  May 13, 2017 ]
I am not sure, i bought the Channel Master and i'm picking up stations over the Appalachian Mountains 70+ miles away [ Mark  May 12, 2017 ]
Yes, it will work with any brand. [ Curt  May 12, 2017 ]
To my knowledge it will work with any OTA TV antenna that doesn't already have a built-in preamp. [ Russell  May 12, 2017 ]