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View Full Version : For Sale: Quad 405 Mk I Power Amp.reduced.


lafty
29-04-2019, 19:39
Really nice example. Has some small yellow marks on top from the feet of the Quad 34 pre-amp - may be able to remove them with the right cleaner. But all working perfectly and sounds great - have been using with my Quad 34 (also for sale) and an Apple Express.

£275 ono Now £200

Happy to demo. Thanks for looking.

Nick

Link to photos below.

https://flic.kr/s/aHsmD67HUN

http://i66.tinypic.com/t826gw.jpg

http://i68.tinypic.com/21dihec.jpg

http://i65.tinypic.com/33nw2dv.jpg

http://i65.tinypic.com/2jam04y.jpg
lafty
02-05-2019, 06:00
Bump!
lafty
04-05-2019, 13:38
Bump - open to offers - on its own or bundled with my Quad 34 pre-amp.
lafty
08-05-2019, 07:55
Bump
lafty
11-05-2019, 11:22
Bump - Reduced to £250 (can't see how to edit the original post)
lafty
14-05-2019, 07:54
Bump
lafty
18-05-2019, 16:49
Bump - reduced to £235 ono
lafty
22-05-2019, 21:00
Bump!
lafty
26-05-2019, 11:57
Bump - only £235
Martyn Miles
26-05-2019, 14:22
This is very tempting...
Martyn Miles
26-05-2019, 15:45
PM sent
spendorman
26-05-2019, 15:54
An extremely good and very cheap upgrade for the 405-1 is to replace the LM301A with TL071 op amps. The LM301a's are socketed, so the change is easy.
lafty
08-06-2019, 09:29
Weekend Bump
vintagesteve
08-06-2019, 10:55
An extremely good and very cheap upgrade for the 405-1 is to replace the LM301A with TL071 op amps. The LM301a's are socketed, so the change is easy.

The TL071 is itself a pretty basic op amp. The OPA134 is much better. http://www.ti.com/product/OPA134#
spendorman
08-06-2019, 11:34
The TL071 is itself a pretty basic op amp. The OPA134 is much better. http://www.ti.com/product/OPA134#

The TL071 is a major improvement over the original chip. I tried various other chips including Burr Brown ones, and these were difficult to tell over the TL071.
thingfish
08-06-2019, 12:33
Lovely amp Nick, surprised it's still here .... Bargain.
Future classic, and prices rising steadily.
spendorman
08-06-2019, 13:02
Lovely amp Nick, surprised it's still here .... Bargain.
Future classic, and prices rising steadily.

Agreed, I bought my 405 new in 1976 and have taken care of it, the one shown seems in similar condition.
lafty
08-06-2019, 13:32
Thanks guys - I’m surprised it’s still around too. I would hold onto it if I could!
lafty
10-06-2019, 08:33
Monday morning bump
lafty
11-06-2019, 07:55
Price reduced to £215. (Anyone know how I can edit my post to change the price?)
lafty
13-06-2019, 16:49
Bump
lafty
15-06-2019, 12:34
Weekend bump
lafty
17-06-2019, 21:38
Still available. Will have to go on auction site soon!
lafty
22-06-2019, 07:09
Bump for the weekend.
lafty
30-06-2019, 11:15
Bump - price lowered to £200.