B-52 Professional: US-1200 — US-1800 — US-3000

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US-Series Professional Power Amplifiers:
US-1200 — US-1800 — US-3000 — US-4000 — US-5000 — US-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

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

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

9.6A

power pink noise

Severe level, 1/3

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)