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In Reply to: RE: Quad 303, DC voltage on speaker output question posted by copydex on July 29, 2015 at 01:02:36
Copydex
Output coupling capacitor (2000uF) leaking electrically , probably because of his very old age , replace him with fresh new one .
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"Art which does not have the appearance of art is true art."
- Old Roman saying -
Follow Ups:
Thanks for the reply and suggestion of likely cause of the DC reading I got.
I took a gamble earlier, using a pair of old speakers which already have a couple of issues (and so which wouldn't be much of a loss if I killed them completely), connected them up to the 33/303 and a turntable. I was surprised to discover that on first switch on, there were none of the expected nasty thump sounds, or indeed any humming from the speakers that you might expect from faulty capacitors. The amps were actually extremely quiet in operation, and the music sounded great, so I am now wondering whether I may have simply measured incorrectly or if the amps require speakers to be connected, in order to function correctly.
Does anyone have any ideas?
Quad 303's functioning perfectly and sounding startlingly good after 30-40 years is absolutely typical in my experience. Still haven't found an amp I like better, in some situations perhaps the 606 (keep changing my mind on that).
Quad 33's functioning perfectly? Absolutely a-typical, find a passive for the 303 - Creek OBH-12, some older QED units, etc - and good luck finding something that sounds better once you do that!
I'm using my 303 with a QED passive in a 60*25 room with a pair of floorstanders and could live with this setup for life - massive sumptuous image at very moderate volumes and tubelike smoothness throughout the range.
Let it run for a few days - my bet is it's just fine.
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