Summer and Winter stereo power amps for QUAD 63 OR Sub/bass duty

Planar Speaker Asylum

Welcome! Need support, you got it. Or share your ideas and experiences.

I now have two 100+wpc SS power amps as well as the two LEAK St20s rethought and rebuilt.

[There is also a Perreaux power amp on offer.]

One is a former professional stage amp with gain controls and balanced inputs (and RCA's just added.) It is a Fostex 300 which will give 100wpc/8 and 150/4ohms. It is very heavy with a big toroidal transformer.
It has just been serviced, haven't had the bill but < $Au 200.

The other one is a HK870 100wpc/8, but with 60 amps of instantaneous current reserve. It has also been serviced and had its protection circuits made more effective.

Note that the 63s - see my recent post - have now had their OEM protection wound back and the input cap bypassed/replaced. They will be a lot easier to drive.

So, which one would you use into the QUADs and which for bass only duty?

For Winter duty I will try out the two "Once Were LEAK St20s" one in UL driving the Quads and one in pentode mode doing <150Hz OR <80Hz bass only duty. See below.

Note that it is a smallish room.

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

Modified St20s (Open in New Window)

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Topic - Summer and Winter stereo power amps for QUAD 63 OR Sub/bass duty - Timbo in Oz 20:00:07 03/31/16 (4)

RE: Summer and Winter stereo power amps for QUAD 63 OR Sub/bass duty - Mr Peabody 14:13:34 04/05/16 (3)

Thanks for that. - Timbo in Oz 14:53:43 04/05/16 (2)

RE: Thanks for that. - Mr Peabody 19:09:55 04/05/16 (1)

I have to do all this stuff to a tight budget, even more so since I retired. long-ish! - Timbo in Oz 00:13:17 04/06/16 (0)

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