How Loud is the Distortion from Your Power Amplifier?
Would you put a Washing Machine in your Listening Room? If the answer is no, you may be surprised to discover that the distortion produced by your ...
Audio Application Notes
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REL Subwoofers with AHB2 Power Amplifier
Many Benchmark customers are using their AHB2 power amplifiers with REL subwoofers. This application note shows how to connect one or two AHB2 ampl...
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Audio Myth - "Damping Factor Isn't Much of a Factor"
Myth - "Damping Factor Isn't Much of a Factor" Myth - "A Damping Factor of 10 is High Enough" Myth - "All Amplifiers Have a High-Enough Damping Fac...
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Feed-Forward Error Correction
The Benchmark AHB2 power amplifier and HPA4 headphone amplifier both feature feed-forward error correction. This correction system is an important ...
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Balanced vs. Unbalanced Analog Interfaces
If you look at the back of any Benchmark product, you will find balanced XLR analog-audio connectors. As a convenience, we also provide unbalanced ...
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Relay-Controlled Volume - The Ultimate Solution for Analog Audio
Benchmark has introduced a new analog-to-analog volume control circuit that features a 256-step relay-controlled attenuator and a 16-step relay-con...
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Laboratory Use of the Benchmark AHB2 Power Amplifier
SEAS, a well-known manufacturer of high-quality loudspeakers, selected the Benchmark AHB2 as a key component for use in testing loudspeakers. They ...
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Interpreting THD Measurements - Think dB not Percent!
Distortion measurements (THD, THD+N and IMD) are traditionally expressed in terms of percent. But what do 1%, 0.1%, 0.01% or 0.001% mean in terms o...
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Calculating the Performance of an Amplifier-Speaker Combination - Example 2
Example 2 - PMC MB2S In this application note we calculate the maximum output level and noise level produced by an amplifier/loudspeaker combinatio...
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AHB2 Tri-Amp Setup - Ellery Coffman
The following photos and system descriptions were provided to us by one of our customers, Ellery Coffman. He has put together an amazing system and...
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Speaker Sensitivity and Amplifier Power
Speaker sensitivity is a measure of how loud a speaker will play at a given input power or at a given input voltage. Sensitivity is normally measur...
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Calculating the Performance of an Amplifier-Speaker Combination
Example 1 - PMC IB2S In this application note we calculate the maximum output level and noise level produced by an amplifier/loudspeaker combinatio...
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Power Amplifiers - A "First Watt" ABX Test
In Benchmark's listening room we recently demonstrated the importance of the first watt using two 100 watt stereo power amplifiers. One amplifier...
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Audio Myth - "Switching Power Supplies are Noisy"
This Myth Goes Something Like This: "Switching supplies are noisy." "Linear power supplies are best for audio." We disagree! About 5 years ago, Ben...
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Benchmark Bi-Directional 12 Volt Trigger - Technical Details
12 Volt Trigger Link your audio products together with trigger cables Benchmark has created a bi-directional 12 Volt trigger interface that is co...
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History of the AHB2 Power Amplifier
The DA101 - Inspiration for the AHB2 Over 33 years ago (in 1983), Benchmark's founder, Allen H. Burdick, began building analog audio distribution a...
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The A.H.B. Story
A.H.B. The AHB2 power amplifier is named in honor of Benchmark's founder, Allen H. Burdick. Allen had a life-long passion for audio, and became one...
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AHB2 Crossover Distortion Measurements
Crossover Distortion - Measurements The following measurements and scope photos demonstrate the effectiveness of the feedforward system in the AHB2...
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