UL-A800 v2.0

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5.0 average, based on 2 reviews


Product Information

UL-A800 v2.0


Car Audio Magazine 
This UL-800v2.0 Series Amplifier is built using 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 UL Series amplifier series) 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 UL800v2.0 series amplifier you just purchased is exactly the same Critical MASS series Amplifier used in that system.  







18/oct variable Hi-pass
18/oct variable Lo-pass
Full range available on all channels 1,2,3,4CH
Power on LED
Protection indicator LED
Gain volume Min - Max
Protection circuit for thermal,
overload, DC reverse, - DV offset
2 ohm native/channel
Small Footprint
Light Weight
Ultra High Efficiency
RMS power at 4 Ω Stereo 102w x 4 CH
RMS Power at 4 Ω Mono (Bridged) 408w x 2 CH
RMS Power at 2 Ω Stereo 204w x 4CH
High pass variable crossover
(0Hz~200Hz at 18 dB/OCT -1,2CH (Channels A)
High pass variable crossover
(50Hz~750Hz at 18 dB/OCT -3,4CH (Channels B)
Low pass variable crossover
(50Hz~750Hz at 18dB/OCT - 3,4CH (Channels B)
Max power 1000w @14.4V
T.H.D. 0.009%
Input sensitivity 200mV~8V
Input impedance 92K Ω
Damping factor >630
S/N Ratio 115db
Channel separation 110dB
S/N ratio 105dB


Product CodeUL-A800v20

Customer Reviews

Average Rating: 5

Very clean sounding amplifier

This critical mass audio amplifier sounds great. I love classic rock and this amplifier has the clean power I was looking for. This is my 2nd critical mass amplifier, the other one is 20 years old and it's still kicking. (Nov 16 2016, 19:04 PM)


This is an CM ULA-800 is an outstanding Amplifier. I have never (in my 30 years in the Car Audio business) used a better amplifier for my full range speakers. With my previous Audison th quattro amplifier my system suffered at hi levels in part do to the unquenchable thirst for input voltage. Unlike my previous amplifiers I no longer have to worry about cycling wine. This Critical MASS ULA800 is so much better. It sounds amazing at all levels, from low to ear shattering volume the saound is always amazingly clear. I highly recomend it. Mingo B MS (Dec 16 2010, 05:08 AM)
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