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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: RE: BTW- Vintage Power Amp with Passive Pre posted by Bold Eagle on July 14, 2012 at 17:11:18:
IF a DC blocking cap. is present at the O/P of the driving unit, an I/P cap. is unnecessary. However, an awful lot of stuff has an opamp and no cap. at the O/Ps. A BJT buffer with a unipolar PSU can't work with 1 of those cap.-less opamp O/Ps, even though a DC offset is not present.
The reason some units get into trouble with "high" capacitance cables, even though they have respectably low O/P impedances, is that they lack O/P current capability. An ability to charge and discharge the cable capacitance is absolutely necessary. Even driving line level interconnect cables requires a measure of cojones.
Eli D.
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Follow Ups
- 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)
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