Advice on Quad power amps.

[walpurgis]

I keep wondering whether to start stockpiling 306 amps as an investment while they can still be bought at somewhat sensible prices. I think the 306 is possibly the best sounding Quad power amp and I anticipate values rising a fair bit before too long. For the excellent build quality and sound, I think they are undervalued in real terms. What else is there that competes at the money? Nothing!

[Macca]

I had a severe downer on the 306, but suspect it was the 34 causing the issues with audio 'fog' ..

You think?

First time I heard a 34 (up against a Croft Micro Basic) I thought it was broken.

[walpurgis]

First time I heard a 34 (up against a Croft Micro Basic) I thought it was broken.

Yes. Tried one in my system many years ago and got much the same impression. Still, some like 'em! (probably never heard a decent pre-amp though)

[DSJR]

Old Quad preamps invert the phase, if that's any help.

[Mikeandvan]

I never bid early on anything. Why tell competing bidders to up their bids?

I decide the max I'm willing to pay and bid that amount eight seconds before the end. That way there's no time for a competing bidder to bid again. Of course, there may be a bigger bid than yours already going in or a bigger snipe bid, but that's a chance you take.

I dunno, I just sit at home bored bidding on stuff. Anyway, it went upto £220, so I saw a bin for £225 and bought that one instead.
https://www.ebay.co.uk/itm/Quad-306-...53.m2749.l2648

[walpurgis]

I dunno, I just sit at home bored bidding on stuff. Anyway, it went upto £220, so I saw a bin for £225 and bought that one instead.
https://www.ebay.co.uk/itm/Quad-306-...53.m2749.l2648

Looks a nice one. You won't regret buying it, they're a cracking amp for that kind of money.

[fatmarley]

Input sensitivity on the Quads is too high, particularly the 306.

Oh yea, forgot that I changed mine (it's very easy to do).

[fatmarley]

You use the little bear with a 306 right?

Yes, As Geoff said, there's too much gain as standard but you only have to replace one resistor per channel to adjust that. I used Vishay MRS25 resistors.

[walpurgis]

Oh yea, forgot that I changed mine (it's very easy to do).

Been thinking of doing mine. I've got the details somewhere (I think ).

[walpurgis]

Yes, As Geoff said, there's too much gain as standard but you only have to replace one resistor per channel to adjust that. I used Vishay MRS25 resistors.

Just checked. Looks like R13 needs to be 27R for 1.0V input sensitivity on the 306. Nice and easy to reach. What rating resistors did you use?