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Benchmark AHB2 High-Resolution Power Amplifier (Silver)

BH #BEHRPAS • MFR #500-18000-100
Benchmark AHB2 High-Resolution Power Amplifier (Silver)
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Benchmark AHB2 Overview

The silver AHB2 High-Resolution Power Amplifier from Benchmark is designed to accurately reproduce high resolution audio. The dynamic range approaches 130 dB, and the frequency response extends below 0.1 Hz and beyond 200 kHz. When reproducing high-resolution 24-bit PCM and 1-bit DSD digital audio formats, this amplifier allows you to hear nuances and dynamics which get lost when using amplifiers with lower dynamic ranges.

The AHB2 has bi-polar class-AB output stage that delivers high output current and low noise. The THX patented feed-forward error correction provides accurate cancellation of zero-crossing errors. In addition, the AHB2 uses a resonant switching power supply with a fast control loop so mechanical hum is eliminated while magnetic field strength is reduced.

Dynamic range approaches 130 dB
Bi-Polar class AB output stage provides efficiency and low crossover distortion
SpeakON output connectors
UPC: 837654830734

Benchmark AHB2 Specs

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
Input Sensitivity
Low-Gain: 22 dBu (9.8 Vrms)
Mid-Gain: 14.2 dBu (4 Vrms)
High-Gain: 8.2 dBu (2 Vrms)
Input Impedance
50 kΩ, normal mode
1 MΩ, common mode
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 Voltage Range
-0.3 to 30 VDC
Input Impedance
20 kΩ
Cross Talk
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, 8Ω Load
-0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4Ω Load
Input CMRR
80 dB at 20 Hz, typical
80 dB at 1 kHz, typical
65 dB at 20 kHz, typical
Maximum Output Current
18 A per channel, both channels driven
18 A protection shut-down threshold
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
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%)
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%)
Passive heat sinks
Power Requirements
100 to 120 VAC ± 10%, 8 A, 50 - 60 Hz
220 to 240 VAC ± 10%, 8 A, 50 - 60 Hz
11.0 x 3.9 x 9.3" (28.0 x 9.9 x 23.7 cm) including feet and binding posts
12.5 lb (5.7 kg)
Packaging Info
Package Weight
15.315 lb
Box Dimensions (LxWxH)
15.4 x 13.2 x 7.3"

Benchmark AHB2 Reviews

This thing is amazing.

By Jason
Rated 5 out of 5
Date: 2022-05-21

It sounds really great. I love it. I love Benchmark.... Full Stop.

Nothing but the truth

By William
Rated 5 out of 5
Date: 2021-11-09

The Benchmark AHB2 is the cleanest sounding amp I have owned across 35 years including amplifiers that cost 5X the AHB2. It only provides perfectly clean volume and nothing else. At this power output there is nothing that compares. B&H provided great service getting it to me safely.


By Michael
Rated 5 out of 5
Date: 2022-03-23

Perhaps the best solid state amp you can get for under $10,000? If not, within a hair of that.

Stunning power amp!!

By Takeya
Rated 5 out of 5
Date: 2022-03-06

I replaced from pioneer d amp by this AHB2. Both product is enough great for me. But AHB2 must be quite accurate amplifier. Uncolored clear sound/amplified , that's is my comment.

See any errors on this page? Let us know


just how good is this amp? give me a comparison .

just how good is this amp? give me a comparison .
Asked by: Kevin
This model is known for its very low self noise and high signal to noise ratio using Benchmark's DAC3 digital to analog converter. It is also known for its ability to output at higher levels without introducing distortion into the signal. Further details can be found on the AHB2 product page on Benchmark's site, linked here:
Answered by: David
Date published: 2023-01-20
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