Designed to provide outstanding performance on any stage, in the clubs, and on the road.

The B-52 US-4000 Power Amplifier features low noise, low distortion circuitry and high current output stages. B-52 uses oversized toroidal transformers and large filter capacitors to deliver super clean, fist pumping output even when driving a 2-ohm speaker load.

All B-52 US-series power amplifiers use the most reliable linear output devices to provide ultra-low distortion and ruler flat frequency response. The stellar looking B-52 US-Series professional power amplifiers are made to outperform in any setting. Backed by a 3-year warranty.

B-52 US-4000 Power Amplifier Features:

• Compact 2-rack size
• 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 ¼" TRS input connectors and link XLR output connectors
• 5-Way binding post and Speakon™ outputs
• Low-noise cooling fans with continuously variable speed and highly efficient front-to-rear forced air keeps the amplifiers cool

Get the super-clean power you need for any gig.

B-52 US-4000 Power Amplifier Specifications:

• 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: 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 power pink noise: 7A
• Severe level, 1/3 power pink noise: 14.8A
• Dimensions: 19" (482mm) x 3.5" (88mm) x 17.2" (438mm)
• Net weight: 43lb (16kg)
  
  Power:
• Stereo Both Channel Driven @ 1kHz, 1%THD
• 8 Ohms: 700 watts
• 4 Ohms: 1100 watts
• 2 Ohms: 1600 watts
  
  Bridged Mono @ 1kHz, 1%THD
• 8 Ohms: 2200 watts
• 4 Ohms: 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: 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 power pink noise: 7A
• Severe level, 1/3 power pink noise: 14.8A
• Dimensions: 19" (482mm) x 3.5" (88mm) x 17.2" (438mm)
• Net weight: 49lb (22.3kg)