• Click to enlarge
  • Click to enlarge
  • Click to enlarge
  • Click to enlarge
  • Click to enlarge
  • Click to enlarge
  • Click to enlarge
  • Click to enlarge

Tap for gallery

5.0 average, based on 1 reviews


Product Information

Car Audio Magazine


This CM-AUE2.5K Series Subwoofer Amplifier is the result of extraordinary passion for High-Fidelity. This is the exact subwoofer amplifier used in our world renowned $259,000 ESL world reference esoteric audio system. Built using only the finest techniques and materials available today. Critical  MASS amplifiers are manufactured and tested to meet the highest component quality and control standards. Engineered to provide decades of musical enjoyment. "Critical MASS is a Car Audio company whose Super-Fi electronics have made innovation history in the world of high-end mobile sound" CA&E. Critical Mass was formed from the World’s First Car Audio and Enhancement school by one of Car Audio's first innovators and most influential people in our industry who started the world's first Car Audio and enhancement school back in the late 1980s “CMA”, from this school Critical MASS was started in Orlando, FL, in 1990. Till this day parts of the technical principles and teachings of CMA are used industry wide in Mobile Electronics teachings and books by associations such as MERA and CEA. Over the past decades Critical MASS has continued to innovate and now leading the way with the Critical MASS $259,000 CES-5.1 one of a kind Esoteric ESL sound system. Not only does Critical MASS make the Best and most expensive car audio system in the world, but this system (which integrates this Esoteric ESL Series amplifier) is so good, that when Car Audio Magazine tested the least expensive part of our $259,000 ESL system “the UL12” called it " Perfect ", and "the BEST" and added that it was so good that he would sell a few things, to own one because it's worth every dollar! In  addition the Critical MASS UL12 was rated #1 over all others by Car Audio Magazine, including companies such as JL Audio, Image Dynamics, Alpine, Xtant,  Kicker, Arc Audio, MB Quart, Digital Designs, Cerwin-Vega, Orion, Phoenix Gold  Earthquake etc…  In other words  Imagine how good the rest of the system must sound if the least expensive part of it is the world's BEST? You will not have to imagine much longer as theCM-AUE2.5K series amplifier you just purchased uses many of the same Critical MASS quality components as the amplifier used in our $259,000 electrostat system.   



Only Audiophile grade components with Audiophile tolerances for pure and exact subwoofer audio reproduction at all volume levels throughout the entire subwoofer bandwidth.

.75 ohm native stability. 

Frequency response 5Hz - 400Hz 

High bandwidth Burr-Brown amplifier section

Protection and Power on indicator LED
Audiophile grade input with 8V - 0.1V Gain volume Min - Max
Protection circuit for thermal, overload, over voltage, DC reverse, - DV offset

24/oct variable Subsonic Hi-pass from 

24/oct variable Lo-pass available 

Sub-Bass gain from +0db variable to +18 db 

Ultra-High Efficiency Audiophile design

RMS Power at 2 Ω 1200 W
RMS Power at 1 Ω 2000 W 
RMS Power at 0.75 Ω 2500W

Subsonic High pass variable 
(15Hz~50Hz at 24 dB/OCT  

Low pass variable crossover
(30Hz~300Hz at 24dB/OCT
LP T.H.D. 0.01%
Input sensitivity 100mV~8V
Input impedance 110K Ω
Damping factor >700
S/N Ratio 119db

Product CodeCM-XEB4169

Customer Reviews

Average Rating: 5

Clean powerful sound and Tons of power

If you need 2500 to 3000 watts of clean RMS musical POWER, This is for you. This amplifier is pounding my subwoofers like nothing before. It is .75-ohm stable and I have it pushing one Critical MASS Audio UL12 and it hits so hard that i had to soundproof my car. I love the power and performance of this amplifier and it runs nice and cool. (Sep 17 2019, 19:26 PM)
Write a review

Write Review

Please enter a valid email address.
This field is required.

eCommerce by CubeCart