Beresford 7520 upgrade recommendations

[DaveK]

FWIW my opinion on the best op-amps for the 7520 and all it's derivatives (mine started of as a basic but now has had 'everything' done to it, including Caimanising) are a pair of round metal OPA111 on a 2 into 1 adapter. Unless you are lucky they are now frighteningly expensive but I got mine some time ago when they were much cheaper .
I loaned my 111s and adapter to a friend on here to try in his similarly specc'd 7520 and he agreed they were the best he'd heard too.

[brian2957]

See what you mean about expensive Dave . Also most of the sellers on Ebay are Chinese and I would be highly suspicious of those . Can you please tell me where you sourced yours .
Brian.

[DaveK]

See what you mean about expensive Dave . Also most of the sellers on Ebay are Chinese and I would be highly suspicious of those . Can you please tell me where you sourced yours .
Brian.

Mine ame from an eBay seller in the USA IIRC - I'll see if I can chase the actual source down and post later.
Cheers,
Dave.

[brian2957]

Thanks Dave.
Brian

[DaveK]

Brian,
Interim message: -
I tried to source another pair for my friend but drew a blank. One guy I eBay messaged trades under the name of 'frugaphile'. He told me he couldn't help because of the expense but recommended that I approached another eBay seller in HK or China who trades under the name of 'audjade_chn'. This guy has access to stripped out used items - his listings make no secret of the fact - and frugaphile said he was a good guy to deal with. For some reason I don't think I took it any further but I will keep digging.
Cheers,
Dave.

[brian2957]

Thanks Dave , I have dealt with Ebay seller frugalphile before and he is an excellent seller. Bought a couple of lme4972ha opamps mounted on adaptors from him for a very good price Thanks for the suggestions , I will have a look at them.
Brian.

[DaveK]

Brian,
These are the items concerned, lifted from my eBay archive With some slight embarrassment I have to 'fess up that my memory may not be totally reliable. These are definitely the items I bought (after guidance from a forum friend) but I see they are listed as OPA2111 but the identification etched on the side of each is definitely OPA111. The difference may be unimportant, I'm a know nothing numpty on these matters, but equally it may make all the difference in the world: -

OPA2111 KP dual Low Noise DiFET OpAmp, Pro audio (2)
(item no. 170632920731)
Member ID audiosector | Feedback score of 10165 | 99.9%
Sale date: 28/07/11

Hope it helps a little, even if it is only negatively .

[Reid Malenfant]

You could try the OPA134, it has a simply superb specification. I just bought 6 of them from a bloke in USA to modify three Quad 405 amplifiers

Though I'm not sure if you need a dual op-amp, if you do they try the OPA2134

OPA134 on the bay

[brian2957]

You could try the OPA134, it has a simply superb specification. I just bought 6 of them from a bloke in USA to modify three Quad 405 amplifiers

Though I'm not sure if you need a dual op-amp, if you do they try the OPA2134

OPA134 on the bay

Thanks Mark , hope you are well . I believe that I need a dual opamp , I will have a look at the OPA2134.
Brian.