All Channels driven
 RMS Power at 4 Ω 75W x4 channels

RMS Power at 2 Ω 120W x4 channels
 RMS Power at 1.5 Ω 150W x4 channels 

BRIDGED

RMS Power at 4 Ω 240W x2 channels
 RMS Power at 3 Ω 300W x2 channels

CRITICAL MASS AUDIO 

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 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? 

Founded in the early 90's Critical MASS Audio has established itself over the 30 plus years as one of the finest audio manufacturers in the world. Many even claim Critical MASS Audio is in a league of its own due its unparalleled combination of the highest possible level in sound, design and finish. What is for certain is the proven consistency in delivering excellence for ears, eyes and hands without any kind of compromise - materialized in unique masterpieces. As always made in the USA. Words alone cannot effectively describe the " CRITICAL MASS AUDIO sound". Objective descriptions such as "ruler-smooth frequency response", "ultra fast step response" and excessive adjectives like "neutrality" and "amazing soundstage" could be used however these qualities are a successful by-product of accurate engineering stemming from Critical Mass Audio's goal of reaching for perfection. Sonically, the sheer scale and dynamics of the music in this Car Audio system was bloody extraordinary. The effect was "Audio Oasis! Award material" all the way. The sound was effortless, fluid, natural, organic, and had the sort of transparency that I associate with only the finest sort of designs that I've encountered on this planet. Detail without edginess; dynamics without loss of control; full-frequency-range presentation without humps or valleys... The Critical Mass Audio system was AMAZING!!! If you want the very best in Car - Home - Motorcycle - Boat... The Critical Mass Audio line of Speakers Amplifiers Crossovers and ALL things high-end audio, will be the last stop for you! You have found the best there is.
 

Features:

1.5 ohm native stability. 3 ohms bridged

Frequency response 10hz - 40Khz all 4 channels

High bandwidth amplifier section

Protection and Power on indicator LED
Audiophile grade input with 5V - 0.1V Gain volume Min - Max
Protection circuit for thermal, overload, over voltage, DC reverse, - DV offset

12/oct variable Hi-pass  variable frequency 0hz-750hz

12/oct variable Lo-pass variable frequency 50hz-750hz

12/oct variable Hi-pass variable frequency 50hz-750hz 

NEW for 2007 High Efficiency Class A/B+ design

Specifications: 

All Channels driven
 RMS Power at 4 Ω 75W x4 channels

RMS Power at 2 Ω 120W x4 channels
 RMS Power at 1.5 Ω 150W x4 channels 

BRIDGED

RMS Power at 4 Ω 240W x2 channels
 RMS Power at 3 Ω 300W x2 channels 

Dynamic usable headroom over .75KW 

 
T.H.D. 0.05%
Input sensitivity 100mV~5V
Input impedance 40K Ω
Damping factor >500
S/N Ratio 105db

below is a quote from USACi sound quality World Champion

"I should preface this review with exactly who

the listeners are: Robyn - USACi sound quality

World Champion and me - both musicians and

audiophiles. Needless to say, We are a tough

bunch to impress. The overall transparency is

crystal clear, giving us the sonic illusion that the

musicians were performing over the engine. I really

can't express how happy we are with this set

- and every other Critical MASS product we've

had the pleasure of listening to!
USACi sound quality World Champion