B52 US4000

B-52 US-4000 (B52 US4000)

B-52 US Series Amplifier

700 Watts x2 @ 8 Ohms (Stereo Both Channel Driven @ 1kHz, 1%THD)
1100 Watts x2 @ 4 Ohms (Stereo Both Channel Driven @ 1kHz, 1%THD)
1600 Watts x2 @ 2 Ohms (Stereo Both Channel Driven @ 1kHz, 1%THD)

2200 Watts @ 8 Ohms (Bridged Mono @ 1kHz, 1%THD)
3200 Watts @ 4 Ohms (Bridged Mono @ 1kHz, 1%THD)

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%

B-52 US4000 Amp

US-Series Professional Power Amplifier Features
• 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

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.

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
Inputs: Combo female XLR & 1/4” TRS jack. Link: Male XLR
Outputs: Both 5-way biding post and Speakon
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

FOR MORE INFO ON THIS AMP:
https://www.b-52pro.com/products/USSeriesAmplifiers.html