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Guitar Amplification

US-Series Professional Power Amplifiers:
US-1200 — US-1800 — US-3000 — US-4000 — US-5000US-6000
We at B-52 believe in overbuilding all of our products and the US-Series Professional Power Amplifiers are no exception. We took our time in designing these stellar looking amps to outperform the competition on any stage, in the clubs and on the road. To achieve studio quality audio reproduction we utilized low noise, low distortion circuitry and high current output stages. We used oversized toroidial transformers and large filter capacitors to deliver super clean, fist pumping output even when driving a 2 ohm speaker load. These amplifiers use the most reliable linear output devices which provide ultra low distortion and ruler flat frequency response. The US-Series is backed by our rock solid 3-year warranty and our commitment to reliability known the world over.

Download the US-Series Amplifiers Instruction Manual
< 4.2mg PDF file>
US-1200 — US-1800 — US-3000 — US-4000
USSeriesAmplifiers

US1200
US1800
US-Series Professional Power Amplifier Features: US-1200, US-1800, US-3000 & US-4000
Compact size - up to 3200 watts in 2 rack spaces
High-current toroidal transformers for greater 2-ohm power
21-position detent gain control knobs for consistent settings
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 reduce distortion without sacrificing peak performance
(defeatable on US-3000/US-4000)
Sub-sonic filters protect speakers and increase headroom (defeatable)
Balanced combo XLR and 1/4 TRS input connectors and link XLR output connectors
5-Way binding post and SpeakonTM outputs
Low-noise cooling fans with continuously variable speed and highly
efficient front-to-rear forced air keeps the amplifiers cool
Amplifier Specifications
Model
US-1200
US-1800
US-3000
US-4000
<< Stereo Both Channel Driven @ 1kHz, 1%THD >>
8 Ohms
210 watts
300 watts
500 watts
700 watts
4 Ohms
330 watts
475 watts
800 watts
1100 watts
2 Ohms
430 watts
700 watts
1200 watts
1600 watts
<< Bridged Mono @ 1kHz, 1%THD >>
8 Ohms
650 watts
950 watts
1600 watts
2200 watts
4 Ohms
850 watts
1400 watts
2400 watts
3200 watts
Input Sensitivity
1.23 Vrms (+4 dBu) for full power @ 4 Ohms
Input Impedance
30K ohms Balanced/15K ohms Unbalanced
Frequency Response
0/-0.5dB: 20Hz - 20kHz; 0/-3dB: 5Hz - 60kHz
Signal to Noise Ratio
Better than 100dB (20Hz - 20kHz)
Distortion (SMPTE-IM)
Less than 0.03%
Output Circuitry
AB
AB
H
H
Cooling
Continuously variable speed fan, front to rear
Protection
Short circuit, thermal, current limit, dc offset, AC current inrush,
RF protection, subsonic, turn on/off muting
Connectors
Input: Combo female XLR & 1/4 TRS jack. Link: Male XLR
Output: Both 5-way biding post and Speakon™
Controls
Front: Power on/off switch, volume controls for each channel
Rear: Mode switch (stereo / parallel / bridge), HPF on/off,
Limiter on/off (US3000/4000)
Indicator
Power, parallel, bridge. Each channel: Signal, -20dB, -10dB, clip, protect
Power Requirements
115/230V 60/50Hz factory configured
AC consumption
Both channels driven at 4 Ohm load, at 115Vac (for 230V divide by 2)
Controls
Front: Power on/off switch, volume controls for each channel
Typical level, 1/8
4.5A
6.3A
7A
9.6A
power pink noise
Severe level, 1/3
7A
9.6A
14.8A
19.8A
power pink noise
Dimensions
19 (482mm) x 3.5 (88mm) x 17.2 (438mm)
Net weight
28lb (13kg)
35lb (16kg)
43lb (19kg)
49lb (22.3kg)
 
B-52 Professional, 3383 Gage Ave, Huntington Park, CA, 90255
Toll Free (US): 800-344-4384 I Ph: 323-277-4100 Fax: 323-277-4108
Copyright 2011: ETI Sound Systems, INC