Mod your Beresford 7520

[trailer]

AD826.

x2. Frm the op-amps I have tried it is the most realistic. Well, for me anyway. I prefer the "richer" sound but at the same time still having detail.

[fmzip]

x2. Frm the op-amps I have tried it is the most realistic. Well, for me anyway. I prefer the "richer" sound but at the same time still having detail.

I am looking forward to trying these too. The LM4562's seem a little bright for me but then again my Nichicon Muse caps just have 30 hours on them....

Did you ever try the 4562's with your B&W's trailer?

[trailer]

Did you ever try the 4562's with your B&W's trailer?

Yes, I've tried pretty much all of the usual suspects I think. I can't exactly recall what they sounded like to be honest! I just remember as others recommend op-amps I tended to get a couple and try them out. I've ended up with an 826 in the line-out and a 2132 in the headphone socket. No headphones used though.

[drumlins4ever]

Anyone got a spare AD826 they wanna swap ?
I have some OPA2132 , OPA2134 and LM4562NA opamps i could swap for.
Michael

[Butuz]

After fiddling around all night I have an op amp question.

Stan - can you explain to me the relationship between the fixed/variable op amp and the headphone op amp.

From my experiments it seems if using the fixed/variable outs to my amp - the headphone op amp makes no difference, it can even be removed. Wheras when listening to headphones, the headphone op amp obviously makes a big difference, but also the fixed/variable op amp makes a difference too as if you remove it totally the sound changes and goes much much quieter. Is this the case?

So if I am op amp rolling with the fixed/variable I only need to roll the left hand op amp. But if I am op amp rolling with my headphones, I actually need to roll both op amps. Is this the case?

Also - I noticed that if I remove both op amps, it still produces music!!!! Is this normal??? Can you explain what the op amps actually do?

Cheers from a very confused..

Butuz

[AndrewR]

Apparently my TC-7520 is coming home tomorrow with the Tirna Mods (Wolfson/Silmic/MuRata/Rubycon/Wima)

Tonight I will be mostly doing a happy dance and feeling like a kid waiting for Christmas.

Andrew

[Butuz]

Very interested to hear if you like it upgraded!!!

Butuz

[AndrewR]

Hi Butuz,

Just received and plugged in the Tirna-modded Beresford. First impressions are very positive. A more up-front sound (in terms of the soundstage), improved get-up-and-go, faster leading and trailing edges along with an increase in inner detail.

Also it sounds like there is more to come when properly warmed up. I'm probably going to get a nice surprise when I get home from work.

Andrew

[Clive]

Can someone who has experienced the migration from 7520 to Caiman to fully Tirna modified Caiman apportion some sort of scoring to the changes?

Assuming the mods bring detail, ambiance etc and are positive, does for example going from 7520 to Caiman bring 70% of the improvement and the other mods bring 30%?

[fmzip]

I have/had a TC-7520 which is now in turmoil from my unending mod adventure. Looks like I cooked my DAC. I am ordering some replacement boards from Stan along with a Caiman hopefully today.

But up to the point of the TC-7520's current status:

1) DAC upgrade is by far the biggest improvement
2) Power regulators come in next

Everything else is subtle, caps etc. If I could do it all over again, I may have just stopped at the DAC change. It was so substantial for replacing a $6.00 chip, it was utterly amazing!