Previously Featured Builds

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Don Bingaman

Don Bingaman

After many a moon, I finally finished my Pearl. I added volume and balance controls, a moving coil step-up transformer,… More...
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Peter Daniel

Peter Daniel

Bride of Zen on a shoestring: Since I've been accused on more than one occasion of showing creations that might… More...

Phase -Coherent Crossover Networks — Nelson Pass / 1982

The importance of phase response in the audio chain has been brought to greater focus recently by equipment claims of phase coherency, (the output signal has the same phase relationships as the input signal). It is not particularly obvious that two different frequency components of a signal can go into a device at precisely the same time and emerge at different times, but it is extremely common. All audio components distort the phase of the signal to some degree-even air alters the time alignment of a signal, but the biggest offenders are loudspeakers and their crossover networks. Phase shifts in… More...

Amp Camp Project — Pass DIY / 2016

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