Benchmark AHB2 Power Amp

Up for sale is a Benchmark ADH2 power amplifier with very low hours, purchased at the end of last year. It's in excellent condition, both cosmetically and sonically. It will ship in the original packing box, and includes the manual and power cable. It's a great amp that I've used in my smoke free home studio, but I find myself working increasingly with headphones, so haven't used it much. It's barely broken in; I'd say there are less than 30 hours on it.
Always happy to answer questions. A great amount of info and specs can be found at www.benchmarkmedia.com.
Thanks for looking.

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  CONTINUOUS AVERAGE OUTPUT POWER

  
  

  1 kHz, < 0.0003 % THD+N

  
  
  
  
  • 100 Watts per channel into 8 Ohms, both channels driven
  
  
  • 130 Watts per channel into 6 Ohms, both channels driven
  
  
  • 190 Watts per channel into 4 Ohms, both channels driven
  
  
  • 240 Watts per channel into 3 Ohms, both channels driven
  
  
  • 200 Watts Bridged Mono into 16 Ohms
  
  
  • 380 Watts Bridged Mono into 8 Ohms
  
  
  • 480 Watts Bridged Mono into 6 Ohms
  
  
  
  

  All speakers have variations in input impedance. Select loads based on nominal impedances not minimum impedances. The AHB2 is stable into all loads.

  
  

   SNR & DYNAMIC RANGE

  
  

  Rated output relative to output noise, inputs shorted

  
  
  
  
  • 132 dB A-weighted, Stereo Mode
  
  
  • 135 dB A-weighted, Mono Mode
  
  
  • 130 dB Unweighted, 20 Hz to 20 kHz, Stereo Mode
  
  
  • 133 dB Unweighted, 20 Hz to 20 kHz, Mono Mode
  
  
  
  

  NOISE VOLTAGE

  
  

  Output noise voltage, inputs shorted

  
  
  
  
  • 7.1 uV, A-weighted, Stereo Mode
  
  
  • 9.8 uV, A-weighted, Mono Mode
  
  
  
  

  NOISE POWER RELATIVE TO 1 WATT

  
  

  Output noise power, inputs shorted

  
  
  
  
  • -115 dB Watts, A-weighted, 16-Ohm Load, Stereo Mode
  
  
  • -112 dB Watts, A-weighted, 16-Ohm Load, Mono Mode
  
  
  • -112 dB Watts, A-weighted, 8-Ohm Load, Stereo Mode
  
  
  • -109 dB Watts, A-weighted, 8-Ohm Load, Mono Mode
  
  
  • -111 dB Watts, A-weighted, 6-Ohm Load, Stereo Mode
  
  
  • -108 dB Watts, A-weighted, 6-Ohm Load, Mono Mode
  
  
  • -109 dB Watts, A-weighted, 4-Ohm Load, Stereo Mode
  
  
  
  

  THD+N

  
  

  1 kHz, 80 kHz LPF, at full rated output into any rated load

  
  
  
  
  • < -118 dB (< 0.00013%), Stereo Mode
  
  
  • < -118 dB (< 0.00013%), Mono Mode
  
  
  
  

  THD

  
  

  1 kHz, 20 kHz LPF, at full rated output into any rated load

  
  
  
  
  • < -119 dB (< 0.00011%), Stereo Mode
    
    
  
  
  • < -120 dB (< 0.00010%), Mono Mode
  
  
  
  

  CROSSTALK

  
  
  
  
  • Better than -115 dB at 1 kHz
  
  
  • Better than -92 dB at 20 kHz
  
  
  
  

  FREQUENCY RESPONSE

  
  
  
  
  • Better than 0.1 Hz to 200 kHz, +0/-3 dB
  
  
  • -0.01 dB at 20 Hz, -0.17 dB at 20 kHz, 8-Ohm Load
  
  
  • -0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4-Ohm Load
  
  
  
  

  DAMPING FACTOR

  
  
  
  
  • 350 at 20 Hz, 8-Ohms
  
  
  • 254 at 1 kHz, 8-Ohms
  
  
  • 34 at 20 kHz, 8-Ohms
  
  
  • 7 at 200 kHz, 8-Ohms 
  
  
  
  

  MAXIMUM AUDIO OUTPUT CURRENT

  
  
  • 29 A peak, per channel, both channels driven
  
  

  INPUT SENSITIVITY

  
  
  
  
  • Low-Gain = 22 dBu (9.8 Vrms), Gain = 9.2 dB
  
  
  • Mid-Gain = 14.2 dBu (4 Vrms), Gain = 17.0 dB
  
  
  • High-Gain = 8.2 dBu (2 Vrms), Gain = 23 dB
  
  
  • Use Mid-Gain or High-Gain settings for unbalanced inputs
  
  
  • Unbalanced inputs require RCA to XLRM adapter cables 
  
  
  
  

  INPUT IMPEDANCE

  
  
  
  
  • 50 k Ohms, normal mode
  
  
  • 1 M Ohm, common mode
  
  
  
  

  INPUT CMRR

  
  
  
  
  • 80 dB at 20 Hz, typical
  
  
  • 80 dB at 1 kHz, typical
  
  
  • 65 dB at 20 kHz, typical
  
  
  
  

  TRIGGER I/O

  
  
  
  
  • 12 VDC 200 mA current-limited output to trigger turn-on of remote devices
  
  
  • DC input for slaving to remote devices
  
  
  • Input responds to 3.3 V logic and higher, VIL = 1.26 V, VIH = 2.7 V
  
  
  • Absolute maximum input voltage = 30 VDC
  
  
  • Absolute minimum input voltage = -0.3 VDC
  
  
  • Input Impedance = 20 k Ohms
  
  
  
  

  PROTECTION CIRCUITS

  
  
  
  
  • Fully Electronic, No Relays
  
  
  • Mute Sequencing
  
  
  • Distortion Detection
  
  
  • Short Circuit Detection
  
  
  • Over Current Detection
  
  
  • Over Temperature Detection
  
  
  • SOA Detection (Output device safe operating area)
  
  
  
  

  DIMENSIONS

  
  

  NON-RACK-MOUNT VERSION:

  
  
  
  
  • 11.04" W x 3.88" H x 9.34 " D - Including feet and binding posts
  
  
  • 11.04" W x 3.47" H x 8.33 " D - Excluding feet and connectors
  
  
  • Faceplate height is 2RU
  
  
  
  

  RACK-MOUNT VERSION:

  
  
  
  
  • 19.00" W x 3.88" H x 10.62 " D - Including binding posts, handles and removable feet
  
  
  • 19.00" W x 3.47" H x 8.33 " D - Excluding feet and connectors
  
  
  • 9.09" rack depth, including binding posts, excluding cables
  
  
  • 11" rack depth, including cables
  
  
  • Faceplate height is 2RU
  
  
  
  

  WEIGHT

  
  
  
  
  • 12.5 lbs., 16 lbs. shipping - Non-rack-mount version
  
  
  • 13.5 lbs., 17 lbs. shipping - Rack-mount version
  
  
  
  

  AC INPUT

  
  
  
  
  • Auto-ranging AC Input
  
  
  • 100 to 120 VAC +/- 10%, 8 Amps, 50 - 60 Hz
  
  
  • 220 to 240 VAC +/- 10%, 8 Amps, 50 - 60 Hz
  
  
  • Idle Power Consumption = 20 W
  
  
  • Standby Power Consumption < 0.5 W
  
  
  
  

  MANUAL

  
  

  Detailed specifications and performance plots are available in the downloadable manual.

  
  

  Download the AHB2 Manual →

  
  

 Go to top of page →

DESIGNED, ASSEMBLED, AND TESTED IN THE USA

This Benchmark product was designed, assembled, and tested in the USA using USA and imported components. Most major components are made in USA.