In Reply to: RE: BTW- Power Amp with Passive Pre posted by Eli Duttman on July 11, 2012 at 17:56:16:
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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Follow Ups
- RE: BTW- Power Amp with Passive Pre - Bold Eagle 05:04:00 07/14/12 (7)
- RE: BTW- Vintage Power Amp with Passive Pre - Neff 06:14:54 07/14/12 (6)
- RE: BTW- Vintage Power Amp with Passive Pre - Bold Eagle 10:13:21 07/14/12 (5)
- RE: BTW- Vintage Power Amp with Passive Pre - Eli Duttman 13:11:20 07/14/12 (4)
- RE: BTW- Vintage Power Amp with Passive Pre - Bold Eagle 17:11:18 07/14/12 (2)
- RE: BTW- Vintage Power Amp with Passive Pre - Eli Duttman 18:04:49 07/14/12 (1)
- RE: BTW- Vintage Power Amp with Passive Pre - Bold Eagle 18:30:48 07/14/12 (0)
- Handcuffs........ - Neff 13:59:26 07/14/12 (0)