Benchmark AHB-2 power amplifier

Benchmark's reference-level compact power amplifier. Together with the DAC3 HGC, it forms a complete system.

Technical information:

• 1 kHz, < 0.0003% THD+N
• 100 W/channel into 8 Ohms, both channels driven
• 130 W/channel into 6 Ohms, both channels driven
• 190 W/channel into 4 Ohms, both channels driven
• 240 W/channel into 3 Ohms, both channels driven
• 200 W Bridged Mono into 16 Ohms
• 380 W Bridged Mono into 8 Ohms
• 480 W Bridged Mono into 6 Ohms

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

• 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

• 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

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

• 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

• 18 A per channel, both channels driven
• 18 A protection shut-down threshold

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

• 50 kOhms, normal mode
• 1 MOhm, common mode

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

• 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 kOhms

• Auto-ranging AC Input
• 100 to 120 VAC +/- 10%, 8 Amps, 50 - 60 Hz
• 220 to 240 VAC +/- 10%, 8 Amps, 50 - 60 Hz

Dimensions

• 28.04 W x 9.85 H x 23.72 D cm - Including feet and binding posts
• 28.04 W x 8.81 H x 21.15 D cm - Excluding feet and connectors
• Faceplate height is 2RU

• 48.25 W x 9.85 H x 23.72 D cm - Including binding posts and removable feet
• 48.25 W x 8.81 H x 21.15 D cm - Excluding feet and connectors
• Faceplate height is 2RU

• 5.66 kg, 6.80 kg shipping - Non-rack-mount version
• 6.12 kg, 7.25 kg shipping - Rack-mount version