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Jensen DUBa4100

4-channel car amplifier — 70 watts RMS x 4

19 Reviews | 3 questions - 9 answers

Overview

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. 

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.

Casey, Lake charles LA

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

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
Reviews

Jensen DUBa4100 Reviews

Average Customer Review:

19 Reviews

Awsome Amp

Written by: Danny from Roanoke, VA on April 27, 2016

1996 Toyota Camry

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

Written by: Peter S from Sydney, Australia on April 20, 2016

1969 Volkswagen Karmann Ghia
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 VW...so is a perfect match up. Great company to deal with!

Pros: All positive

Cons: No negatives to report

Jensen Amplifier rocks!

Written by: Alex from Raleigh, NC on April 14, 2016

2006 Dodge Ram 2500
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 :-)

Pros:

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Can't find this much power for this price!

Written by: Jacob R from Ottawa, Ont on April 9, 2016

2008 Kia Spectra5

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!

Written by: Daddy0 from key west, FL on March 24, 2016

2004 Chevrolet Impala
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!

Cons:

Worked like a charm

Written by: Casey from Lake charles LA on March 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

Written by: Kmorris from st louis, MO on March 11, 2016

Crutchfield Customer Review (What's this?)

Perfect for 75watt rms 4 channel amp

Pros:

Cons:

Good Amp!!

Written by: Patrick from round rock, TX on March 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!

Pros:

Cons:

Jensen 4100

Written by: Andrew from Shreveport, LA on March 2, 2016

Crutchfield Customer Review (What's this?)

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

Pros:

Cons:

Whole Lotta Amp

Written by: flyrod from anderson, SC on February 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

GOOD AMP

Written by: phillip from Savannah mo on January 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

Written by: Daniel from kill devil hills, NC on January 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

Written by: David from Richmond, Virginia on January 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

Pros:

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Don't buy this

Written by: Shawn from Santa Rita, Guam on December 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

Written by: Anonymous from California on September 30, 2015

Crutchfield Customer Review (What's this?)

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

Pros:

Cons:

Loud and clean!

Written by: AdamD from Kansas on September 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.

Perfect

Written by: Randy I from Michigan on August 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

Written by: Mike D. from Georgia on May 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

Written by: AP from Baltimore MD on July 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

Details

Hands-on research

What's in the box?

Download the Jensen DUBa4100 manual

  • 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

Product Research

Features
Controls
Connections

Features

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.

Controls

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).

Connections

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.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

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 ]

3 questions already asked

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
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