Audio Apex CAB-M4 4 Channel Car Amplifier 1000 Watts RMS

$249.99 $209.99
(You save $140.00 )
(10 reviews)
11.00 LBS
25.00 (in)
5.00 (in)
13.00 (in)
Current Stock:
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Audio Apex CAB-M4 Amplifier


CAB-M4 Amplifier 

The CAB-M4 is one of the best  bang for the buck 4 Channel amplifiers available on the market today. The amplifiers are a class A/B amplifier that deliver 150 watts a channel @ 4 ohm, and over 250 watts a channel @ 2ohm for over 1,000 watts total across 4 channels! The amplifier is also bridgeable for 500 watts x 2 @ 4ohms for those wanting to run 1 or more subwoofers. 

4ga Power and Ground inputs 

Operational Voltage: 9.0v -16.0v

Power: 250 Watts RMS X 4 @ 2 ohm at 14.4v

Power: 150 Watts RMS  X 4 @ 4 ohm at 14.4v

Power: 500 Watts RMS X 2 @ 4 ohms(Bridged) at 14.4v

Frequency Response: 20-20,000 Hz 

Signal Noise Ratio: 85dB

Input Sensitivity: 22,000 Ohms

Input Sensitivity: 100MV-6V

T.H.D. : <0.05%

Bass Frequency: 30Hz-80Hz

Low Pass Frequency: 40Hz-4,000Hz

High Pass Frequency: 50Hz-8,000Hz

Bass Boost: 0-12dB


Length: 17.5"

Width: 9"

Height: 2.25"

Your CAB-M4 has several different warranty options available. To keep the price as low as possible, the base amplifier carries a 90 warranty against manufacturers defects only. This warranty does not cover damage done to amplifiers from miswiring, blown speakers, low voltage, and other user errors. The premiere warranty tier (79.99) covers practically all forms of damage done to the amplifier for 2 years. This premium warranty also has a graduated deductible associated with user error failures to avoid intentional misuse of the policy. In the first 12 months, the first use has a 0.00 deductible, the second use has a 50.00 deductible, the third use will have a 100.00 deductible. the 4th and all subsequent uses will have a 150.00 deductible. If the first use is in the second year, the deductibles start at 50.00 instead of 0.00. This warranty is non transferable, and is only valid for the original purchaser.


  • 5
    The best you can get for the money.

    Posted by Robert Davidson on 9th Mar 2023

    I purchased one of these to play with and see what I thought. A few days later, I ordered 3 more for a total of 4 to replace my 4 DC Audio 175.4 A/B. That probably sounds crazy but so many amps advertise bandpass filters and they don't work. The DC 175.4 for instance only crosses over up to 300Hz. Why on earth have a BPF if it only goes to 300Hz? It's completely pointless. I also had the Crescendo 2000.4 and couldn't get that to work. These amps have bandpass filters that actually work. So I have 4 amps that do exactly what I tell them to do without the need for a DSP. l have a total of 5 highs amps that are all 4 channel. And when you have that many 4 channel amps, DSP setup can be a real nightmare. You actually need multiple DSP's. But with these amps, I set one for horns, one for mid bass, one for tweeters, and one for vocal 6.5's. Cutting off the top and bottom end wherever I need to for each amp. Making them play exactly in the range that I want them to. No more DSP woes. They put out excellent power and they have tiffany style RCA's (which my $660 DC amps don't have). The only complaint I can come up with is how sensitive the crossovers are. It makes dialing them in perfectly a little time consuming. But man it's worth it. Exceptional amp for the money. A bandpass filter that actually works. Imagine that.

  • 5
    Great results so far

    Posted by Derrick Adams on 25th Sep 2022

    Very fast shipping great customer service

  • 5

    Posted by brooks mcmath on 25th Aug 2022

    This amp performs amazing. I've got a pair of deaf bonce Arnold's, pair of ds18 pro coax's and gtr-1 tweets and this amp makes them scream. Very clear sounding aswell.

  • 5
    Quality 4 channel amp

    Posted by Barrett Snyder on 4th Jul 2022

    If you're on the fence about this purchase don't hesitate. Build quality is

  • 5
    Still sitting in the box

    Posted by Eric Hoskins on 25th Jun 2022

    Waiting for my alternator and still need to get sound deadener. Although I have thought about takin the other 4 channel amp out and test running the cab m4 I do enough of the install it and take it back out at my work to a point I want nothing to do with the install and take it back out at home Gotta love building ships for the Navy/ government

  • 5

    Posted by Tj Reavis on 7th Mar 2022

    Love this amp. It has plenty of power and sounds amazing..

  • 5
    Great merchandise for the money

    Posted by Kristopher Firestone on 14th Feb 2022

    Very good item I’ve ordered multiple apps from here very good products for the money

  • 5
    Cab m4

    Posted by Rickey on 4th Jan 2022

    Super fast shipping got within the week

  • 4
    Cab m4 and 22

    Posted by Ryan amen on 28th Dec 2021

    Im going to b straight foward with 2 cons for both the cab 22 and m4...1st con is the quality control on heatsinks...they need to b deburred and checked for deformities such as bent fins and scratches...seems as if they slice a bunch up n jus toss em in a bin...both my amps came with theese defects...does it hurt the performance?...not a damn bit!!!.. 2nd con is just personal preference...phillips bit set screws...GET RID OF THEM!!.. THEY STRIP WAY TO EASY..i replaced all on my bass amp..phillips and tightening down 0 gauge is not a fun process together.. both theese cons can b fixed and addressed with little to no cost to keep prices the that thats out of the way..very very very impressed on the power theese boards put out...they sound clean...even at full tilt...running 4 pro mids and tweets off the 4ch and the gains are barely cracked...and to stay sounding that clean when i have the channels loaded to 2 for the cab 22.... .5 ohm daily on a set of 15s for 3mnths now no probs...give em clean power and airflow n theese things will outperform other budget manufacture 2ks easily...even the ones that look like usamps reprints lolol (sry johnathan)...all in all def worth ur money if on a budget!...fix the 2 cons 5 stars all day n night long...cant wait 2 get another 22 n strap...easy 5k budget there...gud job audio apex...and stay in the game...we need more options such as you!