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

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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.

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B-52 US-4000 Power Amplifier Features:

Compact 2-rack sizeHigh-current toroidal transformers for greater 2-ohm power21-position detent gain control knobs for consistent settingsFront panel LED display: Power, bridge and parallel LEDs and signal,20dB, -10dB, 0dB, clip and protect LEDs for each channelProtection: short circuit, output current limiting, thermal, DC offset, turn on/off muting, RF protection and circuit breakerClip 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 connectors5-Way binding post and Speakon™ outputsLow-noise cooling fans with continuously variable speed and highly efficient front-to-rear forced air keeps the amplifiers cool

B-52 US-4000 Power Amplifier Specifications:

Input Sensitivity: 1.23 Vrms (+4 dBu) for full power @ 4 OhmsInput Impedance: 30K ohms Balanced/15K ohms UnbalancedFrequency Response: 0/-0.5dB: 20Hz - 20kHz; 0/-3dB: 5Hz - 60kHzSignal to Noise Ratio: Better than 100dB (20Hz - 20kHz)Distortion (SMPTE-IM): Less than 0.03%Output Circuitry: HCooling: Continuously variable speed fan, front to rearProtection: Short circuit, thermal, current limit, dc offset, AC current inrush, RF protection, subsonic, turn on/off mutingConnectors: Input: Combo female XLR & 1/4" TRS jack. Link: Male XLROutput: Both 5-way biding post and Speakon™Controls:Front: Power on/off switch, volume controls for each channelRear: Mode switch (stereo / parallel / bridge), HPF on/off, Limiter on/off (US3000/4000)Indicator: Power, parallel, bridge. Each channel: Signal, -20dB, -10dB, clip, protectPower Requirements: 115/230V 60/50Hz factory configuredAC 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 channelTypical level, 1/8 power pink noise: 7ASevere level, 1/3 power pink noise: 14.8ADimensions: 19" (482mm) x 3.5" (88mm) x 17.2" (438mm)Net weight: 43lb (16kg)Power:Stereo Both Channel Driven @ 1kHz, 1%THD8 Ohms: 700 watts 4 Ohms: 1100 watts2 Ohms: 1600 wattsBridged Mono @ 1kHz, 1%THD8 Ohms: 2200 watts4 Ohms: 3200 wattsInput Sensitivity: 1.23 Vrms (+4 dBu) for full power @ 4 OhmsInput Impedance: 30K ohms Balanced/15K ohms UnbalancedFrequency Response: 0/-0.5dB: 20Hz - 20kHz; 0/-3dB: 5Hz - 60kHzSignal to Noise Ratio: Better than 100dB (20Hz - 20kHz)Distortion (SMPTE-IM): Less than 0.03%Output Circuitry: HCooling: Continuously variable speed fan, front to rearProtection: Short circuit, thermal, current limit, dc offset, AC current inrush, RF protection, subsonic, turn on/off mutingConnectors: Input: Combo female XLR & 1/4" TRS jack. Link: Male XLROutput: Both 5-way biding post and Speakon™Controls:Front: Power on/off switch, volume controls for each channelRear: Mode switch (stereo / parallel / bridge), HPF on/off, Limiter on/off (US3000/4000)Indicator: Power, parallel, bridge. Each channel: Signal, -20dB, -10dB, clip, protectPower Requirements: 115/230V 60/50Hz factory configuredAC 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 channelTypical level, 1/8 power pink noise: 7ASevere level, 1/3 power pink noise: 14.8ADimensions: 19" (482mm) x 3.5" (88mm) x 17.2" (438mm)Net weight: 49lb (22.3kg)