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Classic gear from yesteryear; vintage audio standing the test of time.

RE: BTW- Power Amp with Passive Pre

Eli,

I think that's good advice. I have had several instances where a buffer was needed, and they all worked out very well.

In my cases I used a bi-polar transistor and a single ended power supply. All the installations were in a powered chassis and were used to lower the output impedance of the preamp, so power was available. Comparing buffered Vs un-buffered, I could not hear any difference unless the preamp was driving a low impedance load. Several receivers and integrated amps that featured pre-out and main-in jacks had quite high preamp output impedances and wouldn't drive an amp, EQ, or crossover with low input impedance without sounding bad.

Jerry


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