Mod your Beresford 7520

[apmusson]

Think I might give the 4032's a go now that we seem to have found the eBay supplier that will do all the prep work. I have found the 49720's just take a bit of the feeling out of the sound - this could be because the bass is a little loose and is overshadowing the uppers and the mid's. Some albums/tracks though sound much better with the 49720's - just depends on the recording/music genre.

I assume your talking about Tirna electronics. They supplied me with 2 lots of boards, chips and caps all presoldered and ready to install. Total cost inc shipping was £19.70 and they arrived 2 days after ordering.

[mwahahaha]

I assume your talking about Tirna electronics. They supplied me with 2 lots of boards, chips and caps all presoldered and ready to install. Total cost inc shipping was £19.70 and they arrived 2 days after ordering.

Excellent! that sounds great - another eBay seller enjoying the AOS/Beresford effect

[trailer]

And they are excellent folk to deal with too.

[mwahahaha]

Can anyone think of a problem with mixing the opamps? I don't use phones so am not really bothered about paying to upgrade the headamp section.

[Covenant]

I am the same-only going to change one op-amp. I think Stan himself stated a preference for two different op-amps in his own 7520.

[sponge]

Can anyone think of a problem with mixing the opamps? I don't use phones so am not really bothered about paying to upgrade the headamp section.

No problem here - I'm a headphone user (exclusively) and I'm more than happy with the combination of LM4562NA (plastic) in the left hand socket and THS4032 in the right hand socket.

I've been looking through the spec sheets (as you do) and wondered if anyone has tried, or has any experience of the AD826 and/or the AD823. They seem to get pretty good reports and are available for a decent price.

Ken

[Krisbee]

As a fully paid up member of the electronically challenged club, I held my breath when swapping out the NE5532s for two LM4562NA op amps.

It was a bit fiddly with those caps so close to the socket, and I clumsily managed to bend pins on one of the extracted NE5532s. But the new op amps are safely in and running since yesterday.

And the result is ... it's only a few hours later but listening on my Senn HD595s there's definitely a bit more going on. I'd say there was greater clarity in the bass, everything is v.well defined and very musical.

Just had a bit of a baroque fest (Vivaldi, Bach, Handel and Telemann) topped off with a little Mozart and Beethoven. Audio reproduction is very convincing, and getting a good sense of a recording's and broadcast's overall acoustic.

When I can stretch to a pair of K701s, then the 4032 beckons, and IJust noticed that Tirna Electornics have added a "Beresford DAC" specific item to Ebay for a "THS4032CD Dual Op Amp Beresford DAC Upgrade 8 PIN DIL" @ £8.92 plus post. It could'nt be easier.

[mwahahaha]

one less for sale now

[Getgaff]

Just noticed that Tirna Electornics have added a "Beresford DAC" specific item to Ebay for a "THS4032CD Dual Op Amp Beresford DAC Upgrade 8 PIN DIL" @ £8.92 plus post. It could'nt be easier.

Nice find.

one less for sale now

And other one gone

[StanleyB]

It's nice to see that in these difficult times I am able to help in my own way towards encouraging people to do their own upgrade instead of them having to send it off off to someone else for an expensive minor tweak. At the same time I am also helping other small businesses to get a bit of income from the sale of spares.

STan