Previously Featured Builds

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Ian Mackenzie(DIY High-Low Crossover)

Ian Mackenzie

Here is my High Low Pass Active Crossover project. I started on this project over 12 months ago after reading… More...
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Claes Ericson

Claes Ericson

I have successfully built a clone of the A30 amplifier. It was a lot of work but definitely worth it.… More...

Leaving Class A — Nelson Pass / 2008

The meters on our amplifi ers are different. They refl ect the current consumption of the amplifi er, and when the amplifi er is operating, they don’t go down to zero like the meters on other amplifi ers. This is because the electrical current consumption of our circuits has a fairly high value at all times, a property called the bias. The bias current runs through the amplifi ers at a minimum value, determining the class of operation – Class B, Class AB, or Class A. Class B has no bias current, Class AB has a moderate bias current, and… More...

Amp Camp Project — Pass DIY / 2016

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