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5.0 average, based on 2 reviews


Product Information

Car Audio Magazine

This ELS-1000.2 Series Amplifier is the result of extraordinary passion for High-Fidelity. This is the exact 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 the ESL-1000.4 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 exact audio reproduction at all volume levels throughout the entire bandwidth.

2 ohm native stability per channel (4 channels). 4 ohms bridged.

Frequency response 5Hz - 50Khz

High bandwidth amplifier section

Protection and Power on indicator LED

Audiophile grade input with 9V - 0.1V Gain volume Min - Max

Protection circuit for thermal, overload, over voltage, DC reverse, - DV offset

18 db/oct variable Hi-pass available on all channels

18 db/oct variable Lo-pass available on all channels

Full range available on all channels

True Audiophile 1 ohm design for full range drivers and subwoofers alike  

High Efficiency Audiophile design



RMS Power at 2 Ω Stereo 200w x 4CH  (use 1 x Critical MASS 2ohm series Components)

RMS Power at 1.5 ohms 250w x 4 ch (use 3 x  traditional 4 ohm speakers or components per channel to achieve 250w RMS per Channel)

RMS Power at 4 Ω Mono (Bridged) 400w x 2 CH 

RMS power at 4 Ω Stereo 100w x 4 CH 


High pass variable crossover

(15Hz~3KHz at 18 db/oct - all channels

Low pass variable crossover

(15Hz~3KHz at 18 db/oct -  all channels

T.H.D. 0.001%

Input sensitivity 100mV~9V

Input impedance 120K Ω

Damping factor >800

S/N Ratio >118db

Channel separation >115dB

Specifications at recomended 14.5V                1khz

Product CodeELS-1000.4

Customer Reviews

Average Rating: 5

Just replaced my old Zapco Amplifier with this one from Critical Mass

Just replaced my old Zapco Amplifier with this one... The Critical Mass amplifier sounds very clean, no distortion at any volume and it makes my old speakers sound better than ever. (Feb 05 2018, 05:43 AM)

True Car HiFi stereo system amplifier

I am running 2 of these amps, one on my front stage and and one on my rear fills. The sound is soooooooooo good it makes me feel happy every time i have to take a ride. I have the critical mass 6.5'' in the front and the focal's in the rear. Great sound, even the wife likes it. (Jan 29 2018, 14:11 PM)
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