Previously Featured Builds

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Gary P Smith

Gary P Smith

I’m sure you have heard this until you are blue in the face, but my mother taught me to say… More...
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Mark Lamb

Mark Lamb

I have built two Nelson Pass designs, Balanced Bride of Zen preamp and two Zen Power Amps, and am very… 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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