Supreme Sound Audio discrete Op-amp upgrade

[Puffin]

Bummer. I had a fault on a Dac years ago, took me ages to believe that an expensive Analog Devices Op-Amp had gone bad.

[AlfaGTV]

The problem has been identified! The Burson V5-OPA-D is sensitive to overriding their voltage limit! Unfortunately the Karan drives it's OPAs quite hard with a voltage supply of -/+18V. The Burson can only take -/+16V
However a representative from Burson has assured me that the V4, which accepts these voltages, will be very nearly as good sounding as e V5's! They should be on their way right now!

[Qwin]

Yes, their V5 spec sheet recommends max -/+ 15v

Good that they are taking the trouble to try and find a solution for you, I have found them to be very helpful with my project.

[AlfaGTV]

Today i recieved a big letter from Australia with two pairs of V4 Dual discrete opamps. They are already installed in the Karan, bedding in! Sounds very good initially!

Good customer service, though not particularly fast correspondence, have resolved all issues!

These guys reputedly can take the pounding from the Karans power supply!

Nice touch to deliver these in aluminium tubing, by the way!

[Ikemen]

Best way to buy these in the U.K. anyone?

[Qwin]

Buy them direct from Australia for best price, contact Burson Audio on their web site.

I am currently experimenting with a mix of Burson v5 and Sparkos Labs which works better for me.
Sparkos are from the USA, but you can buy both as a BIN or make an offer on eBay UK from time to time, I made an offer for mine.
Sparkos: http://sparkoslabs.com/discrete-op-amps/

See what I'm up to here: http://www.jkwynn.co.uk/SAP_HTML/SAP_13.html

[Ikemen]

Thank you for the pointer. I see the offer option on eBay for the Sparko's. Would love to know what you offered them

Burson V5i are £40 in England, so I will work it out.

LM4562 were suggested elsewhere, at £2.50 each! I could do with six dual channels, so...

[Qwin]

LM4562 are my favourite monolithic op amp for the KMTech circuit that I used. But mix and match gives better results, than using one type throughout.

I can't remember how much I paid for the single channel Sparkos, I remember they were more expensive than the Burson v5 and I think I offered $8 per unit less than the ebay asking price at the time (November).

Who is stocking Burson in the UK?
Audiophonics in France keeps them, a pair of dual channel are 149 Euro.

[Ikemen]

Good to hear the LM4562 are decent. Gives a cheap alternative to the Bursons to try on my four way crossover.

UK seller for Burson V5i
http://www.itemaudio.co.uk/upgrades/...-amp-dual.html
I've never used them myself.

[Qwin]

Those V5i you link to, are not true discrete units, they are a hybrid, mixing a small SMD chip plus discrete components in a small package.

The V5 proper are fully discrete and a lot taller and as you might expect, more expensive.

Never tried the V5i so I can't comment on how they perform.