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Jensen DUBa4100

4-channel car amplifier — 70 watts RMS x 4

49 Reviews | 7 questions - 23 answers

Item # 110DUB4100

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Our take on the Jensen DUBa4100

Since 1925, Jensen has been a pioneer in home and car electronics, developing landmark products such as the first high-efficiency loudspeaker and the first car stereo speaker.  Now Jensen has partnered with DUB® magazine, the leading publication in the urban automotive lifestyle market, to introduce DUB Edition speakers and amplifiers, featuring DUB-designed cosmetics and co-designed components.

Jensen + DUB

Since 1925, Jensen has been a pioneer in home and car electronics, developing landmark products such as the first high-efficiency loudspeaker and the first car stereo speaker.  Now Jensen has partnered with DUB® magazine, the leading publication in the urban automotive lifestyle market, to introduce DUB Edition speakers and amplifiers, featuring DUB-designed cosmetics and co-designed components.

Good news for your next cruise

The DUB Series DUBa4100 4-channel amplifier will send 70 watts RMS to each of your front and rear speakers, while its variable frequency filters and bass boost let you zoom in on the sound you want. You can also set up the DUBa4100 can also be wired to drive two channels at 170 watts for a 4-ohm load, making it a good choice for driving subwoofers as well.

This Class AB amp uses a MOSFET power supply and high-current output transistors to deliver strong, reliable power, and it features full short-circuit, DC offset, and thermal protection, so the music won't stop until you want it to. And why would you want it to? You've got DUB on the case. 

Product Highlights:

  • 4-channel car amplifier
  • 70 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
  • 170 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
  • CEA-2006 compliant
  • Class AB amp technology
  • variable low-pass filter (40-300 Hz, 12 dB/octave)
  • variable high-pass filter (40-300 Hz, 12 dB/octave)
  • variable bass EQ: 0-12 dB at 45 Hz
  • preamp inputs and outputs
  • fuse rating: 20A x 2
  • 8-gauge power and ground leads recommended—wiring and hardware not included with amplifier
  • dimensions: 14-3/8"L x 2"H x 8-1/8"W
  • frequency response: 10-60,000 Hz
  • weight: 6.4 lbs
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • 4-Channel Class AB amplifier with two 20A ATO fuses installed
  • Spare 20A ATO fuse
  • 2 End caps (installed)
  • 4 Machine screws for end caps (M3 x 6mm)
  • 4 Self-tapping screws (Length=15mm)
  • 4 Flat washers
  • 4 Split lock washers
  • Installation & Operation Manual
  • Performance Certification card

Great Amp..Lots of power to spare.

NOLITO, Kamuela, HI


Jensen DUBa4100 Reviews

Average Customer Review(s):

(49 Reviews)

Powerful Amp and versatile

NOLITO from Kamuela, HI on 12/24/2016

Crutchfield Customer Review (What's this?)

Great Amp..Lots of power to spare.

Pros: Lots of power to spare and so very versatile. Stable down to 2 ohms.

Cons: None

Jensen DUBa4100

James G. H. from Greenfield, OH on 12/7/2016

Crutchfield Customer Review (What's this?)

Fantastic product!! Works Great with JVC DRVN 6x9's and a DUBW10 sub!! powers both effortlessly!!!

Pros: Slim Profile, Powerful

Cons: Knobs are recessed and do not have markings

Great amp choice

Edwin from PR on 11/20/2016

Crutchfield Customer Review (What's this?)

Very clean and powerful sound whith my kicker speakers. Easy to setup

Pros: Size good power.

Cons: None

Jensen DUBa4100

Jack from Fordland MO on 11/11/2016

Crutchfield Customer Review (What's this?)

Overall great buy works great In my truck and with my speakers that I have thanks Crutchfield

Pros: Everything

Cons: Nothing

Jensen DUBa4100

Caleb from Monroe, MI on 11/2/2016

Crutchfield Customer Review (What's this?)

This amplifier passed my expectations by far it makes my speakers scream since they are not being used to their full potential. You don't know what youre missing until you hear what aftermarket speakers with a amplifier sound like. This amp brought my speakers to life like never before.

Pros: Cheap, loud, easy to install, amazing quality.

Cons: It gets hot quicker than expected

Jensen DUBa4100

Nick from Gray, TN on 10/31/2016

Crutchfield Customer Review (What's this?)

Easy hook up, fits a lot of places, and sounds great. Only negative, the end covers are a bit tight with the plugs connected.

Pros: Easy fit, hides a lot of places, plenty power

Cons: End plugs a tight fit

Jensen DUBa4100

Crutchfield customer from Johnson City, TN on 10/25/2016

Crutchfield Customer Review (What's this?)

Brought my underpowered speaker to life. Crisp clear sound. Smoooooooth value.



Jensen DUBa4100

Crutchfield customer from Houghton, MI on 10/23/2016

Crutchfield Customer Review (What's this?)

Perfect amp matched up to my 2 sets of Infinity reference speakers, crisp signal from my Alpine head unit, this thing drives the speakers perfectly. Could not ask for a better match for my speakers. This combined with my 12 inch subs makes for an ultimate listening experience while driving. Amp does not get even seem to get that hot, it is a great product I recommend for any set of speakers that need 60-80 W rms. I couldn't be happier.

Pros: Perfect power choice for infinity reference 6 3/4 speakers. Excellent power and sound reproduction.

Cons: NONE.

Jensen DUBa4100

sean from Cape Girardeau, MO on 10/20/2016

Crutchfield Customer Review (What's this?)

clean power, pushes my in car speakers as expected. All necessary hardware was provided. Great amp for the price.



Great Amp

Bob from Camden, TN on 10/15/2016

I have the factory Bose system with Navigation in my 09 Yukon, and it just wasn't loud enough so I bought this amp. I still left the Bose subwoofer connected, but hooked this amp up to my 2 pairs of Bose components (2 pairs of 6.5 inch woofers and 1 pair of 1 inch tweeters and 1 pair of 3.5s), and my music came alive. It could possibly be 3 times louder than what it was with less distortion and more clarity. For the price, this is a no-brainer for anyone looking to upgrade.

Pros: Price, Power, Speaker-level inputs, CEA 2006 compliant, Removable end caps

Cons: NONE

Jensen DUBa4100 Amp

Rob H. from Newburyport, MA on 10/9/2016

Crutchfield Customer Review (What's this?)

Very happy with this amp, I like how you can adjust the bass so easily I had a Blaupunkt amplifier is a piece of junk, no matter how I adjusted it there was hardly any bass it sounded like you were in the tunnel. I even bought a new Kenwood radio thinking that was the problem but it sounded the same so I am very happy with this new amplifier.

Pros: Sounds great, not too big, and a great price.

Cons: None

Jensen amp

Carl from Pardeeville, WI on 10/2/2016

Crutchfield Customer Review (What's this?)

Works great, sounds great, priced right, love it



I definitely recommend this amp

Rafael F. from La Vega, Dominican Republic on 9/26/2016

Crutchfield Customer Review (What's this?)

I buy it to use with my pioneer DEH-X6800BT head unit and four pioneer TS-A1675R with 50 watt rms each. The sound is amazing very clear and very high levels with no distorsion. I definitely recommend it to anyone that want a decent amp for a good price. The customer service of crutchfield was also very good and the free shipping was fast.

Pros: Very good price quality ratio Amazing sound quality and level compare with the head unit internal amp.

Cons: A little big.

so far so good!

nickfit from Dothan, AL on 9/25/2016

Crutchfield Customer Review (What's this?)

Using this Amp to push 4x6.5's and a 10" sub. Sounds good and hasn't failed yet. I did need a ground loop isolator to quiet engine noise but that's not the amps fault.

Pros: Good price and plenty of adjustments.

Cons: Could be smaller in size

Awesome AMP

daryl from Waxhaw, NC on 9/21/2016

Crutchfield Customer Review (What's this?)

Budget priced power! made my speakers come alive! great low cost upgrade, the Crutchfield adviser recommended this one to keep my cost down. Exactly what I was looking for.

Pros: Power, better sound, low cost

Cons: none

Jensen DUBa4100

Kevin from TX on 9/13/2016

Crutchfield Customer Review (What's this?)

I bought this amp after reading the reviews and because of the low price, however I didn't have as much luck with it as it seems everybody else did. It overheats after an hour or less of playing which doesn't suit my needs as I frequently drive for that amount of time. I will say it sounds great with no distortion or background noise but was mainly disappointed with how easily this amp overheats

Pros: Good sounding amp and low price

Cons: Overheats easily

Kod botelho

Kody from West Seneca, NY on 9/11/2016

Crutchfield Customer Review (What's this?)

This amp is just right at a killer price a must buy

Pros: Price

Cons: Nothing


Peter from Sanford, NC on 8/27/2016

Crutchfield Customer Review (What's this?)

This Amp really put some get up and go in the sound for a very

Pros: Price, Size, Sound


Jensen DUBa4100

Crutchfield customer from Racine, WI on 8/22/2016

Crutchfield Customer Review (What's this?)

This amp is perfect for my 8" bazooka tube. It has plenty of power without risk of blowing up the sub.



good kick for the price

Slick from Buffalo, NY on 8/7/2016

Crutchfield Customer Review (What's this?)

this is a great amp for the price! i have it powering 2 150w kickers and a mtx 10" sub and it kicks really good. its versatile with its 2,3 or 4 speaker setup. out of the hole system i bought i was the most impressed with this amp and it was the cheapest item on my order i would really recommend this amp.



Adds oomph.

Tom W from Syosset, NY on 7/19/2016

Crutchfield Customer Review (What's this?)

Works as expected.

Pros: Had purchased a Kenwood GPS/Bluetooth/Receiver for my previous vehicle (2006 Tacoma) that made my stock speakers sound fantastic. Was looking for something to add some oomph to the new truck's stock GPS/Bluetooth/Receiver and speakers. This Amp seems to fit the bill at a very reasonable price.

Cons: Does not sound a good as the Kenwood, but is a great improvement over the stock sound system. Physical size of component made installation interesting.

Great Amp

BL from Indianapolis, IN on 7/10/2016

Crutchfield Customer Review (What's this?)

Wow! Can't beat the price for what you get. I added this amp to my aftermarket Pioneer head unit and (4) 6x8 Pioneer speakers and instantly got 3x the volume with no distortion. Had it installed with OFC 8 gauge amp wire kit and got no whine or noise whatsoever. I wasn't looking for thumping bass but got clear crisp sound with more bass than I expected. Amp specs outshines just about everything on the market in this price range. Very happy with purchase.

Pros: Crisp clear sound. Easily tripled my volume with no noticeable distortion. Works very well with 50-60 RMS Pioneer speakers.

Cons: Wish there were markings on the dial settings.

Love this amplifier

tdawg from Denver, CO on 7/6/2016

Crutchfield Customer Review (What's this?)

Love this amplifier. Best bang for the buck by far. easy to install and smaller than used to profile

Pros: good power great across the board response. Crystal clear more power than I really need

Cons: wish the controls had detents so you know the settings.

Was Quite impressed at first

Crutchfield customer from Parrish, FL on 7/6/2016

Crutchfield Customer Review (What's this?)

When I first received this amp I was quite impressed. I had to make a few adjustments to the wires has it came lose from the vibration of the car. I have had it running for about 6-7 months until yesterday, after running for a half our the unit is shutting itself off. Quite frustrating. I will be calling tech support today to see what is going on. Techs are great at Crutchfield- Hopefully they can fix this problem

Pros: Price

Cons: seems to over heat

Jensen DUBa4100

Rick. from WV on 6/27/2016

Crutchfield Customer Review (What's this?)

The Jensen Dub amp was really easy to use and install,Great addition to my system makes it sparkle clear and clean . Thank all of you at Crutchfield Simply the best!! Rick of W.V.

Pros: Great product working fine no issues with it at all!

Cons: No cons at all

Jensen DUBa4100

Robert T from Richmond va on 6/17/2016

Crutchfield Customer Review (What's this?)

Great sound and the fit is perfect easy to adjust



Nice amp

Jackie_Star from NY on 6/14/2016

Crutchfield Customer Review (What's this?)

Very nice amp for the price.

Pros: Price. Even on max power amp stays cool and I've been running it all day,everyday.

Cons: For this price ? None.


troy from Martinsville , IN on 6/13/2016

Crutchfield Customer Review (What's this?)

Nice amp.had Jensen before and it worked great for, years ,until my stupid stepson burnt it up..needs a cap, but that's to be expected with any amp . I'm running 3 ch mode with Kenwood 2x12 sub and polk satellites all @ 2 ohms

Pros: Small loud enough and easy on the wallet

Cons: None

Great Amp!

JasonC from Sellersburg, IN on 6/7/2016

Crutchfield Customer Review (What's this?)

Great all around amp. Drives my son's new pioneer 6X8's nicely.

Pros: Works great! Plenty of settings to tune with

Cons: None

Great amp for the money

Matthew from Raleigh, NC on 6/1/2016

Crutchfield Customer Review (What's this?)

Considering the price of this amp on sale when I bought it, I have very few complaints. I've now had this amp installed for about two weeks and have noticed that on multi-hour trips it can get a bit hot but I have yet to hit any overheat protection. Versus stock head unit, the difference between adequately powered speakers and sub-optimally-powered speakers is enormous. Everything in general is of course louder but it's also much more clear as well. The dials on the amp could be easier to use and should have markers so you can see what the individual dials are set for at a glance. I don't have too many complaints about this as my crossovers, bass boosting, etc are being taken care of by my head unit rather than by the amp. Setting gain is the only dial I have used on them. I also have not attempted to use the two or three channel modes, I have this amp running in 4 channel only. Eventually I will upgrade and bridge this in two channel for my rear deck and power my door speakers with another amp but for now, this setup is much more than adequate compared to stock. I plan on running this for quite some time.

Pros: Fits under a passenger seat. Comes with covers over the sides to help clean up install. Can fit multiple roles using the 2/3/4 channel switch and comes with PF/LPF filters if you prefer to use amplifier-controlled crossovers

Cons: Dials for gain, bass boost, HPF, and LPF have to be used with a screwdriver. No marks exist to show you how high the dials are set.

Awsome Amp

Danny from Roanoke, VA on 4/27/2016

Crutchfield Customer Review (What's this?)

After a lot of research on different 4 channel amps I picked the Jenson DUB amp based on it's performance specifications. I was looking for a minimum of 50 RMS per channel with the option to bridge two of the channels for a sub. My research paid off. This amp is very quite with respect to background noise. All I hear (at any volume) is the music. I mounted the amp in the truck next to back seat and with the low profile, it does not affect trunk storage a bit. This was my first install and I am extremely pleased with the sound quality and power. The amp is easily pushing two new MTX speakers up front and a single bazooka tube in the trunk with clear sound. I highly recommend this amp if you are looking for a 4 channel amp with more that 40 - 50 watts RMS.

Pros: Crystal clear sound with no noticeable background noises or humming sounds.

Cons: None to date.

Value plus all round

Peter S from Sydney, Australia on 4/20/2016

Crutchfield Customer Review (What's this?)

Sensational product for the price. Value plus. Also the technical support and other staff at Crutchfield are first class, friendly, very helpful and knowledgeable. they gave me the confidence that this was an ideal amp to set up for the speakers I already had. Didn't need a road thumper for my small is a perfect match up. Great company to deal with!

Pros: All positive

Cons: No negatives to report

Jensen Amplifier rocks!

Alex from Raleigh, NC on 4/14/2016

Crutchfield Customer Review (What's this?)

I'll preface this with the fact that I'm in my 40's and was simply looking to have a great radio system Vs. what came with my truck. I'm not looking to win any thumping contests so NO I do not have a subwoofer, etc. That said this little amp is great for what I had in mind. It's driving my 4 new Kenwood speakers and I'm thrilled with the sound quality. I not only hear my midrange but have plenty of bass and high range. My music taste is eclectic to say the least, I go from Country to Rock to Classical and they all sound great! I can clearly make out bells and cymbals which were muddied before. I'm very happy with the new setup and happier yet that I was able to do the install and save hundreds of dollars :-)



Can't find this much power for this price!

Jacob R from Ottawa, Ont on 4/9/2016

If you're looking for a small amp that can supply almost any speaker with the output it needs and at a very reasonable price, this is the perfect amp! Now, this amp is only 70 watts RMS by 4 channels at 4 ohms so if you wanted a ridiculously loud system, this amp won't be quite what you want. But for the price, this thing actually gets really loud with no distortion which I haven't seen for an amp this small and this cheap! The build quality is on par as well. It's a very simple design with a very nice brushed aluminum casing which keep the amp pretty cool at high volumes. So if you don't want to spend a lot of money on a system and you want a loud to very loud system, this amp is perfect and the price can't be beat.

Pros: Amp runs my two component Polk audio speakers with no troubles and no distortion and it was cheap, even consider that I had to ship it to Canada!

Cons: None, for this price you shouldn't expect much, but this amp does more than you expect and you get more than what you paid for.

Super nice amp!

Daddy0 from key west, FL on 3/24/2016

Crutchfield Customer Review (What's this?)

This amp has renewed my enthusiasm for high fidelity car audio. Plenty of headroom and loudness with my Infinity Reference 9633cf 6 x 9-Inch 300-Watt High Performance 3-Way Loudspeaker on the rear deck. I can't wait to hear what it will sound like with new front speakers. I am only driving the rear deck so far, and love the sound. I have a Kenwood KDC-HD262U in the dash, and enjoy driving more these days!

Pros: Easy to install, sounds great!


Worked like a charm

Casey from Lake charles LA on 3/17/2016

Crutchfield Customer Review (What's this?)

The amp came with a test certificate showing the specs were as advertised. This amp is slim and has a clean look. The instruction manual on the different settings was accurate and easy to use. The amp was pretty standard to hook up. I may get another for my 2nd vehicle.

Pros: Clean look Easy set up

Cons: None so far

Perfect 4ch amp

Kmorris from st louis, MO on 3/11/2016

Crutchfield Customer Review (What's this?)

Perfect for 75watt rms 4 channel amp



Good Amp!!

Patrick from round rock, TX on 3/6/2016

Crutchfield Customer Review (What's this?)

It's a great amp and install was really simple! I'm new to amps and have this pushing 4 door speakers so I wasn't sure what to expect, but this does do the job!



Jensen 4100

Andrew from Shreveport, LA on 3/2/2016

Crutchfield Customer Review (What's this?)

This product does what it is designed to do. Exactly what I expected thus far.



Whole Lotta Amp

flyrod from anderson, SC on 2/5/2016

Crutchfield Customer Review (What's this?)

This amp makes my Kickers sound loud and clear. RF powered sub barely keeps up.

Pros: Price and reviews. My ears are still ringing. Can't go wrong with Crutchfield

Cons: none so far


phillip from Savannah mo on 1/27/2016

Crutchfield Customer Review (What's this?)

great little amp running 2 6" door speakers and 2 6"x 9" rear speakers

Pros: price

Cons: none

pretty nice

Daniel from kill devil hills, NC on 1/22/2016

Crutchfield Customer Review (What's this?)

Good amp powers my door speakers great has not over heated or cut off

Pros: 70w rms good power for door speakers works great doesn't get really hot nice quite and slick looking

Cons: Came with horrible wire don't use and had to buy a ground loop insulator to stop alternator wine

perfect for my needs

David from Richmond, Virginia on 1/17/2016

Crutchfield Customer Review (What's this?)

used this to amplify 4 Kenwood 5 1/4 speakers. It does a decent job at a fair price. I'm satisfied with the resultson



Don't buy this

Shawn from Santa Rita, Guam on 12/22/2015

Crutchfield Customer Review (What's this?)

Wattage rating is definitely not 800 watts as it says on the box. I have this amp pushing two Infinity Primus PR6500cs front speakers and two Infinity Primus PR9603is in the rear. Amp shuts off after an hour of play. Will be returning for something better.

Pros: None

Cons: Cheap and weak

Works Great

Crutchfield customer from California on 9/30/2015

Crutchfield Customer Review (What's this?)

Powering my 6x9s rears and 6 3/4 fronts. Plenty of power, every thing sounds great!



Loud and clean!

AdamD from Kansas on 9/29/2015

Crutchfield Customer Review (What's this?)

Great price on a great amp! Even at high volume there is no amp hiss present!

Pros: Good power. Normal amp hookups. Smaller footprint for easy install.

Cons: Yet to find any.


Randy I from Michigan on 8/5/2015

Crutchfield Customer Review (What's this?)

Purchased this amp to power my 6 3/4 front and 6x9 rear speakers. Such incredibly loud and detailed music. Glad i listened to the reviews of others on this purchase.

Pros: Clean sounding music. Good design.

Cons: None at this time. No complaints at all

Great Amp as Expected

Mike D. from Georgia on 5/28/2015

Crutchfield Customer Review (What's this?)

I bought this amp to replace another (Jensen XA4100; 50 x 4 Car Amplifier) that I purchased from Crutchfield over a decade ago. It finally blew after 12+ years of service and I needed something to push my '96 Mazda B3000's front and rear (Kenwood) 6 x 8's accompanied by a powered 12" sealed Sub. This one fit in the exact mounting place of the Jensen XA4100 with the wiring and wiring method being identical (11 minute uninstall/install, lucky me...). The tuning options I needed for my 4 channel set-up were similar, if not identical to that of the Jensen XA4100 I replaced with it's variable input levels, filter selection and continuously variable crossover points per front/rear channel(s). The power is there when I need it and it's clean power, living up to it's high 100dBA Signal to Noise Ratio. When I 'push' the system in my truck 'hard' for long periods of time it heats the amp up a bit, but no problems there as it never gets to the point that thermal protection has to kick in and it sounds great throughout it's range moderate to loud. No old school fins on this one for cooling, but it is generously vented on the bottom of the unit with cooling in mind. I am very happy and satisfied with my purchase of this Jensen amp and if the performance and service (12+ years) is anything like the older Jensen amp I replaced, I will continue to love Jensen and their "great bang for your buck" 4 channel amp(s). Not a competition amp, but aggressive and clean.

Pros: Extensive Tuning options, Rugged and Modestly stylish, Robust and clean Power

Cons: None, at this time.

Great amp

AP from Baltimore MD on 7/18/2014

Great amp, powers my kenwood 6x9s and rockford fosgate 5 1/4s very well!! Good price as well!

Pros: Easy setup, great power

Cons: n/a


Hands-on research

Product Research



Overview: The Jensen DUB Edition amplifiers offer performance and value for your vehicle's sound system. With a MOSFET power supply and high-current Toshiba bi-polar output transistors, the DUB amps provide lots of power and control to give your music impressive punch and clarity. The Class AB design reduces idle current and minimizes distortion.

Power Output: The DUBa4100 4-channel amplifier delivers the following power output:

  • CEA Specifications: RMS power output @ 1% THD+N, 20-20kHz, 14.4 VDC:
    • 70 watts x 4 @ 4 ohms
    • 90 watts x 4 @ 2 ohms
    • 170 watts x 2 bridged stereo @ 4 ohms
  • RMS Power Output @ 2% THD+N, 1 kHz, 14.4 VDC:
    • 75 watts x 4 @ 4 ohms
    • 100 watts x 4 @ 2 ohms
    • 200 watts x 2 bridged stereo @ 4 ohms

Protection Circuitry: The amplifier features protection circuitry for thermal overload, DC-offset, and short circuits. The LED on the top of the amp glows yellow if a fault is detected.

Pass-thru RCAs: The DUBa4100 has a pair of RCA connectors that allow you to connect additional amplifiers without having to use a Y-adapter. The line output is unfiltered, providing the same signal as the RCA input.

End Caps: The DUB Edition amps include end caps to cover the wiring and controls for a clean installation. The end caps can be painted to match your vehicle, if desired. The end cap brackets can be removed if you wish to install the amp without the end caps.


Input Level: The DUBa4100's rotary gain control let you match the amp's input sensitivity to the output of the source unit. There are independent input level controls for the front (Channels 1&2) and rear (Channels 3&4). The input sensitivity range of the amplifier is continuously variable between 400mV and 5V. A small screwdriver (not included) is required to set the gain.

Crossover: The amp features 12 dB/octave crossovers that are adjustable from 40 to 300 Hz. There are independent crossovers for the front (Channels 1&2) and rear (Channels 3&4). A 3-way switch lets you configure the crossovers for high-pass or low-pass operation, or switched to full-range to defeat the crossover.

Bass EQ: The DUBa4100 has a 0 to 12dB bass EQ, centered at 45Hz. There are separate Bass EQ controls for the front (Channels 1&2) and rear (Channels 3&4). These are useful for varying the amount of bass if you're running the amp in bridged stereo for driving subwoofers. Ported and Bandpass enclosures should be limited to approximately +6dB to +9dB of boost, while sealed enclosures should be able to accept the full +12dB of boost.

Mode Switch: The Mode switch is a 3-way slide switch that lets you configure the amp for three different input modes: 2 channel (feeds signal to all 4 channels from 2 inputs), 3 channel (feeds signal to all 4 channels with a stereo input for the front and a mono input for the rear), or 4 channel (feeds signal to the 4 channels with individual inputs for each).


Terminals: The Jensen DUBa4100 uses screw terminals for the +12V power, ground, turn-on (remote) lead, and speaker outputs. The screws can be tightened/loosened with a Phillips-head or flat-head screwdriver (not provided).

Power/Ground: The +12V Power and Ground terminals will accept spade connectors up to 7/16" (0.4375") wide. It is recommended that you use an 8 AWG power wire to the battery, with an in-line 40A fuse installed no more than 18" from the battery terminal. An 8 AWG ground wire (minimum) should be used, and attached to a metal area close to the amplifier.

Remote Turn-On: The Remote screw terminal will accept a spade connector up to 5/16" (0.3125"). Typically, an 18 AWG turn-on lead is included in an amplifier wiring kit.

Low-Level Input: The amplifier is equipped with two pairs of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp. A stereo RCA line output is also provided for daisy-chaining another amplifier without requiring a Y-adapter.

Speaker Outputs: The amp features four positive and four negative screw terminals for connecting four speakers in stereo. To bridge the amp to 2 channels, you should connect the Channel 1 & 3 left + and the Channel 2 & 4 right - terminals to the speakers. You can also connect the amp in 3-channel mode by wiring the Front channels in stereo to two full-range speakers, and bridging the Rear channels to a subwoofer. The terminals will accept a spade connector up to 5/16" (0.3125") wide. It is recommended that you use a minimum of 12 AWG wire.

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?

Price, Watts, reviews [ Scott  Nov 28, 2016 ]
Head unit is Jensen touchscreen, wanted matching amplifier. [ David M.  Nov 19, 2016 ]
peyton told me I needed it [ charles  Oct 31, 2016 ]
to power my front and rear door speakers without enough power to blow them. it was the best value 4 channel amp in its power range. [ joseph  Oct 17, 2016 ]
I love the look the price and the durability of the product [ Kelvin  Sep 08, 2016 ]
Needed a 4 channel app for system [ GENARO  Sep 02, 2016 ]
it recommended [ Jesse  Aug 28, 2016 ]
Good price, favorable reviews on your site. [ Cornell  Aug 08, 2016 ]
Inexpensive. Looked like fairly good specs. [ Eric  Aug 08, 2016 ]
I think it will be an easy replacement for the Jensen A432HLX that died on me. All the hook ups look the same so no wiring will be needed. And the price was inline with what I wanted to spend. If this one last as long as the other Jensen amp I have it will be in service for 15 or more years. [ MICHAEL  Aug 01, 2016 ]
It was the best quality for the price. The size was perfect for the space I had available. Now that I have it installed the sound is what I was looking for. [ Robert  Jul 31, 2016 ]
Because this site flooded my son's inbox with ads for speakers - being a young kid he pouted until I got those for him. [ James  Jul 18, 2016 ]
Lowest priced 4 channel on the site. Jensen has always been top notch in the past. Hopefully that continues. [ Christopher A.  Jul 16, 2016 ]
good price; good reviews. [ Moinuddin  Jul 07, 2016 ]
price, reviews [ Matthew  Jun 27, 2016 ]
Saw it in May/June Catalog [ 1000 N Olive  Jun 26, 2016 ]
Excellent amp for the price!!! Used my Crutchfield rewards card and saved even more! Clean design and paintable end-caps for a slick installation look. [ Scott  May 31, 2016 ]
Could not find a 4 channel amplifier with the features I wanted, fit within my budget and power needs locally. [ Christopher  May 13, 2016 ]
Good price for a quality brand [ Brendan  May 08, 2016 ]
I chose this amp because of the sale price. I was considering the Sound Ordinance amp, but the specs on this were a little better and the sale price made this one less expensive. [ SteveNC  May 06, 2016 ]
I choose this amp due to the low cost, and my experience with a larger Jensen amp that I have been using in my other car for the last 8 years with no issues. It has even gone through a bad roll-over crash, and moved it to another car and it keeps on pushing out great sound! [ Joseph  Apr 23, 2016 ]
good price [ KIM DANIEL  Apr 17, 2016 ]
4 channel amp and reasonable price. [ Brandon  Apr 09, 2016 ]
price and quality [ DENNIS A  Mar 26, 2016 ]
lowest price 4 channel amp with good reviews [ Jay  Mar 10, 2016 ]
price, ability to run at 2 ohms [ Greg  Mar 05, 2016 ]
specs on amp were the closest to my speakers without going over. I prefer to have my amps underdrive my speakers by a small amount to help idiot proof the system and avoid blowing a speaker. [ Donald  Feb 03, 2016 ]
Because it's features. [ R  Jan 30, 2016 ]
product features, awesome price and great review were the reasons to chose this. [ Quamrul  Jan 29, 2016 ]
Was looking for a low cost amp without a fan that would be suitable for an offroad toy that will subject the amp to lots of dust and vibration. We will have to wait and see what happens. [ Thomas  Jan 03, 2016 ]
Price. I respect Crutchfield to sell quality equipment regardless of price. [ JAMES  Jan 03, 2016 ]
Surprisingly enough, I have always avoided Jensen for no other reason than I view them as the "bargain brand". However, I began noticing Jensen has consistently good product reviews. I junked my supposedly "better than Jensen" Clarion deck last year for a Jensen. Today it's an amp for my nephew for Christmas. [ Mark  Dec 20, 2015 ]
Great reviews [ Adrian  Dec 16, 2015 ]

7 questions already asked

Yes, there is an output gain adjustment on this unit. It also has variable adjustable crossover point(s) to control the frequencies that are allowed to go to your speakers. This amp is versatile. [ Michael  Jul 11, 2016 ]
yes, turn your stereo up about 3/4 and then adjust your gain so everything is nice and clear. Good luck, David [ David  Jul 11, 2016 ]
Not sue. I upgraded to aftermarket speakers. [ RICHARD  Jul 11, 2016 ]
Yes you will need to run a new positive and negative from the amp to each speaker [ Gina  Jul 12, 2016 ]
Not necessarily but if you don't have quality wires you will want to. Amp will carry a more powerful signal than low gauge wires can handle [ WILLIAM  Jul 11, 2016 ]
NOt necessarily u can run a 9 wire from the amp to the factory wires behind the radio [ Adrian  Jul 11, 2016 ]
Yes [ RICHARD  Jul 11, 2016 ]
I have two hooked up in different cars to Infinity speakers that are supposed to be three ohm. No problems so far. [ ADAM  Jun 30, 2016 ]
Sorry but, the amp that I bought was not a Jensen. I wish it would have been cause the one I bought such a POS I pulled it and threw it in the trash. [ stu  Jun 30, 2016 ]
Yes! It's pretty powerful [ Amy  Jun 30, 2016 ]
yes [ troy  Jun 14, 2016 ]
Yes. This amp can handle your present and future scenario(s). It has the ability to run in 2, 3, or 4 Channel Mode. This amp is versatile. It can run 2 speakers in stereo, or 2 speakers in stereo with the 3rd channel bridged to power a small sub woofer, or finally 2 stereo fronts and 2 stereo rears, like I run. [ Michael  Jun 11, 2016 ]
Yes it can power 2 or 4 speakers. [ Travis  Jun 10, 2016 ]
3.5mm cable will be needed [ troy  Jun 14, 2016 ]
Each channel has an RCA input connection. [ Charles  Apr 13, 2016 ]
As long as this amp is hooked up to power and ground with power to the remote stud, this amp will play anything that comes in the RCA jacks... I have used this amp with an RCA splitter to play music from my phone. [ Amber  Apr 13, 2016 ]
I'm sorry I don't kknow [ David  Apr 13, 2016 ]
Can only be used for the 4 door speakers or 2 door speakers and a sub, but it cant do all 4 and a sub [ Steven  Aug 10, 2015 ]
Hey Tim, this one has 2, 3 or 4 channel mode(s). The wiring diagram displays (3) hook-ups. They are: (1) - Four speakers. (2) - Two speakers and a bridged sub. (3) - Two subs. Hope this helps. The Four speaker and Sub into 1 amp scenario would require a 5 channel amp, I believe. [ Michael  Aug 09, 2015 ]
No, it will only power 4 door speakers or 2 speakers and a sub. You will need a 5 channel amp to power 4 speakers and a sub. [ Jeff A.  Aug 08, 2015 ]
Dpends on how you wire your speakers, if the amp can drive two of your speakers per channel you have two left over for the sub which in most cases is ideal. However if you speakers need more power a 5 channel amplifier is probably a better choice [ russell  Aug 08, 2015 ]
2 Door and sub, but suggest best application use this for 4 speakers and get seperate or built in power for sub as I used. [ MURRAY  Aug 08, 2015 ]
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Greg  Jul 08, 2014 ]  Staff