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THE BEAUTY OF POWER
B-52 US Series Professional Power Amplifiers - Instruction Manual
US SERIES AMPLIFIERS
US-1200 US-1800 US-3000 US-4000
Rated Output Power STEREO BOTH CHANNELS 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
Rated Output Power 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 Continuosly 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
TM
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 current consumption Both channels driven at 4 Ohm load, at 115Vac (for 230V divide by 2)
Typical level, 4.5A 6.3A 7A 9.6A
1/8 power pink noise
Severe level, 7A 9.6A 14.8A 19.8A
1/3 power pink noise
Dimensions (W x H x D) 19” (482mm) x 3.5” (88mm) x 17.2” (438mm)
Net Weight 28lb (13kg) 35lb (16kg) 43lb (19kg) 49lb (22.3kg)
SPECIFICATIONS
20
* Specifications are subject to change without notice.