ETI Sound Systems, INC US-1200 Manuel D’Utilisation

THE BEAUTY OF POWER

The US-Series features four professional heavy-duty power amplifiers, covering a wide range of 

output power ratings. The models are US-1200, US-1800, US-3000 and US-4000. US-Series 

amplifiers are built on a rugged, heavy gauge steel chassis with a sturdy aluminum front panel. 

The amplifiers use advanced circuitry and a well-designed PCB layout to ensure quality sound 

and enhanced reliability. Large aluminum heatsinks and an oversized toroidal transformer, com-

bined with comprehensive protection circuitry and variable speed fan(s) provide worry-free and 

reliable operation in the most demanding environments.

•  Compact size - up to 3200 watts in two rack spaces
•  Rugged heavy gauge steel enclosure with sturdy aluminum front panel for stability 
 

and increased longevity

•  High-current toroidal transformers for increased 2-ohm power output
•  21-position gain control knobs for consistent settings
•  Selectable STEREO, PARALLEL MONO and BRIDGED MONO modes for flexibility
•  Front panel LED display: POWER, BRIDGE and PARALLEL LEDs and SIGNAL, -20dB, -10dB, 

0dB, CLIP and PROTECT LEDs for each channel

•  Protection: Short circuit, output current limiting, thermal, DC offset, turn on/off muting,  
 

RF protection and circuit breaker

•  Clip limiters to reduce distortion without sacrificing peak performance (defeatable on  

US-3000/US-4000)

•  Sub-sonic filters to protect speakers and increase headroom (defeatable)
•  Balanced combo XLR and 1/4” TRS input connectors and link XLR output connectors
•  Both binding posts and Speakon™ output connectors
•  Low-noise cooling fans with continuous variable speed and highly efficient front-to-rear  
 

forced air cooling design

•  Replaceable open cell foam air filters