The Benchmark AHB2 High-Resolution Power Amplifier is a high-performance audio amplifier designed for professional use. It features output power capabilities of 100 W/channel into 8 Ω, 130 W/channel into 6 Ω, 190 W/channel into 4 Ω, 240 W/channel into 3 Ω, and 200 W Bridged Mono into 16 Ω. The amplifier has input sensitivity levels of 22 dBu (9.8 Vrms) for low gain, 14.2 dBu (4 Vrms) for mid gain, and 8.2 dBu (2 Vrms) for high gain. It also includes input impedance settings of 50 kΩ, normal mode and 1 MΩ, common mode. The amplifier has triggers with a 12 VDC, 200 mA current-limited output, and input voltage range from -0.3 to 30 VDC. Additional specifications include cross talk better than -115 dB at 1 kHz and better than -92 dB at 20 kHz, frequency response better than 0.1 Hz to 200 kHz, input CMRR of 80 dB at 20 Hz, 80 dB at 1 kHz, and 65 dB at 20 kHz, maximum output current of 18 A per channel, signal-to-noise ratio of 132 dB A-weighted, and THD+N less than -118 dB at 1 kHz.
Output Power: 1 kHz, < 0.0003% THD+N 100 W/channel into 8 Ω, both channels driven 130 W/channel into 6 Ω, both channels driven 190 W/channel into 4 Ω, both channels driven 240 W/channel into 3 Ω, both channels driven 200 W Bridged Mono into 16 Ω 380 W Bridged Mono into 8 Ω 480 W Bridged Mono into 6 Ω
18 A per channel, both channels driven 18 A protection shut-down threshold
Output Power
1 kHz, < 0.0003% THD+N 100 W/channel into 8 Ω, both channels driven 130 W/channel into 6 Ω, both channels driven 190 W/channel into 4 Ω, both channels driven 240 W/channel into 3 Ω, both channels driven 200 W Bridged Mono into 16 Ω 380 W Bridged Mono into 8 Ω 480 W Bridged Mono into 6 Ω
Package Weight
16.535 lb
Power Requirements
100 to 120 VAC ± 10%, 8 A, 50 - 60 Hz 220 to 240 VAC ± 10%, 8 A, 50 - 60 Hz
Signal to Noise Ratio
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
THD
1 kHz, 20 kHz LPF, at full rated output into any rated load Stereo Mode: < -119 dB (< 0.00011%) Mono Mode: < -120 dB (< 0.00010%)
THD + N
1 kHz, 80 kHz LPF, at full rated output into any rated load Stereo Mode: < -118 dB (< 0.00013%) Mono Mode: < -118 dB (< 0.00013%)
Triggers
12 VDC, 200 mA current-limited output of remote device VIL: 1.26 V, VIH: 2.7 V (input responds to 3.3 V logic and higher)
Input CMRR
80 dB at 20 Hz, typical 80 dB at 1 kHz, typical 65 dB at 20 kHz, typical
Technical
Dimensions
19.0 x 3.9 x 9.3" (48.3 x 9.9 x 23.7 cm) including feet and binding posts
Weight
13.5 lb (6.1 kg)
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, 8Ω Load -0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4Ω Load
