This confirmed that, with hard to drive speakers, I would recommend grabbing two Benchmark amps and using them in mono block mode. Because of that, I had to up the gain on my pre-amp just a few clicks more than usual. Starting with Dakota Staton’s album ‘Round Midnight from the original Capitol release, issued in 1960, I connected the Benchmark to my Quad 57 electrostatics, which are not the easiest speakers to drive. The low-gain setting is designed to interface directly with Benchmark DAC2 converters.” SOUND QUALITY ![]() A rear-panel gain switch can be used to set the AHB2 at higher gain settings if necessary. The AHB2 is 17 dB quieter than some of the very best power amplifiers on the market. The power supply rails maintain a constant voltage during audio peaks.”īenchmark also talks about the low noise nature of the amplifier, “Most power amplifiers have far too much gain and consequently they suffer from poor noise performance. Maximum power output of the AHB2 does not vary with line voltage or audio loading. This active regulation is much more effective than capacitive energy-storage. This control loop responds to audio-frequency load changes and keeps the supply voltage constant without the use of a large bank of capacitors. Better than 0.Also, the company declares that, “…the AHB2 uses a resonant switching power supply that has a very fast control loop.170 W/channel into 4 Ohms, both channels driven.100 W/channel into 8 Ohms, both channels driven.Benchmark highly recommends the use of the twist-lock SpeakON output connectors. The SpeakON connectors are designed for heavy-duty commercial sound systems and provide much better electrical connections than binding posts. Benchmark considers balanced inputs essential in a true high-resolution system.Įquipped with high-quality binding posts, and SpeakON output connectors. The low-noise input amplifiers on the AHB2 are equipped with precision balanced inputs. Low-level details and reverb tails are rendered with a stunning resolution. The extended frequency response delivers a nearly perfect impulse response, and a nearly perfect phase response.ĭistortion performance exceeds that of class A amplifiers, while the efficiency exceeds that of traditional class AB amplifiers. At the other end of the audio spectrum, the low-frequency response extends below 0.1 Hz. The frequency response of the AHB2 extends beyond 200 kHz, to deliver the ultrasonic detail and fast transients captured by high-resolution recordings. The AHB2 delivers true High-Resolution Audio. You will discover previously overlooked nuances, dynamics, and detail in your favourite recordings and experience the full potential of the latest high-resolution 24-bit PCM and 1-bit DSD audio formats. The dynamic range of the AHB2 approaches 130dB, making it 10 to 30 dB quieter than the typical reference-quality power amplifier. ![]() The Benchmark AHB2 power amplifier delivers musical details without introducing the masking effects of amplifier noise and distortion.
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