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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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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Relay-Controlled Volume - The Ultimate Solution for Analog Audio
Benchmark has introduced a new analog volume control circuit that features a 256-step relay-controlled attenuator and a 16-step relay-controlled bo...
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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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Intersample Overs in CD Recordings
Many oversampled DACs clip when playing CDs. This clipping is caused by a hidden defect in most oversampled DACs. Discover the cause and the cure. ...
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A Look Inside the New ES9028PRO Converter Chip and the New DAC3
This application note examines the differences between the ES9018 and the new ES9028PRO. It also compares the Benchmark DAC2 and DAC3 to demonstrat...
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Power Amplifiers - A "First Watt" ABX Test
Using a double-blind ABX test, we verified that there was a clearly audible difference between two amplifiers at an output level of just 0.01 watt.
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AHB2 Crossover Distortion Measurements
These measurements and scope photos demonstrate the effectiveness of the feedforward system in the AHB2. From the first Watt to the last Watt, the ...
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Amplifier Crossover Distortion
Most audio power amplifiers suffer from a defect known as "crossover distortion". This distortion is particularly troublesome at low output levels....
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How Should I Buy an Audio System?
Buying an audio product is much like buying a car. Some products are designed for performance and others are designed for comfort. Cadillac or Pors...
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Will the HPA2 Drive My Headphones?
Benchmark DAC1, DAC2 and DAC3 converters are equipped with Benchmark’s HPA2 headphone power amplifier. It is capable of driving a wide variety of h...
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The HPA2™ Headphone Power Amplifier
Many Benchmark products include our HPA2™ headphone amplifier. Unlike most headphone amplifiers, the HPA2™ is actually a small power amplifier. Why...
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The AHB2 - A Radical Approach to Audio Power Amplification
Radical! The performance of the AHB2 would not have been achievable without taking a radical approach to power amplification. In many ways, the A...
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Don't Blame the Headphones!
Headphones Sounding Bad? It Could be Your Headphone Amplifier! It is easy to build a headphone amplifier that produces sound. It is an entirely di...
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Why "Audio Goes to 11"
Intersample Overs - Part 2 In my last post, "Audio that Goes to 11", I made the bold assertion that most of our audio recordings contain peaks t...
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Audio That Goes to 11
Intersample Overs - Part 1 It's on your iPhone, your Android and your computer. It's even on those CDs you put on a shelf somewhere. Audio that ...
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Headphone Amplifiers - Part 2
It's all about control! - Headphone Output Impedance The movement of headphone transducers must be well controlled in order to produce high-quality...
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