Mod your Beresford 7520

[ZebuTheOxen]

Solder back the MLC5/6 and do a listening test again.

The 4562NA has been chosen for the Caiman for more than one reason. So don't dispose of them. You might need to dig them up later again...

Stan

Wouldn't dream of throwing opamps away.

I'll give that a spin. If it's back to being muddy again, perhaps using smaller caps would help?
The slew on the 4562s is quite low and I imagine that would be of benefit as a result.

[Maximum]

I'm thinking of sending my 7520 off to Tirna for the dac change. I notice they have a page up now on the website...

http://www.tirnaelectronics.co.uk/services/Audio.shtml

I am slightly confused by the Caiman spec comment at the bottom though. Are they referring to the MLC5/6 mod?

[Covenant]

I dont think that comment is anything to do with the MLC 5/6 mod. Perhaps Stan could enlighten us here. A 7520 with Wolfson Dac and LM4562 is not up to Caiman spec according to Tirna.
Stan would you mind confirming what differences remain between the two?

[StanleyB]

Stan would you mind confirming what differences remain between the two?

I have to protect the integrity of the Caiman and the investment of the owners.

Stan

[Covenant]

I have to protect the integrity of the Caiman and the investment of the owners.

Stan

Fair enough, I am happy with my Wolfson jobby so its back to trying a few more op-amps.

[StanleyB]

Try the Caiman bass mod. I am now using 47K, and with very good results.

[Alexxus]

Men! Listen up!

No, seriously, I now need a bit of input from yas. Now. I got my 7520 modded with a 4032 on the line out and a 4562 on the headphone section (4032 was giving me too much of everything, so I rolled back on that one). It sounds so damn good on both of them, I just can't see how it can get any better.

Having said that, you guys on this thread must have experienced this before, on your first change, didn't ya? But you went on and made more changes anyway, didn't ya? So, then. I got meself a Wolfson chipset, but I keep looking at it and wondering how can it make things better.

So what I'm asking is this: you guys that have gone for this one already, is this worth it? Is it even marginally better than the PCM1716? Marginally better is good enough for me, any more than that and I'll be delirious. But I need you guys to tell me I'm not gonna ruin a perfectly good thing. I am not, am I?

Come on guys, now's the time to show you're mates and fess up. Should I go do it?

[lovejoy]

Hi Eddie,
It's not marginally better. It's a significant upgrade.

I was perfectly happy with my 7510, then my 7520 showed me what my 7510 wasn't doing, then the Wolfson DAC change had my jaw hitting the floor.

I think it's one of those cases where ignorance is bliss. If you're loving your 7520 and are just enjoying music from it, then don't fix what isn't broken. If on the other hand (at it sounds like this is the case) your curiosity won't be satisfied until you've heard a Wolfson modded 7520, then you really won't be disappointed. Just make sure you're either well versed in surface mount chip changes, or you know someone who is.

[chrism]

Recommend that you try the wire mod first on your 7510 as you may be happy with that alone.

Regards

[Clive]

Try the Caiman bass mod. I am now using 47K, and with very good results.

I've missed a description of this, presumably a resistor change. Can someone point me to a post describing this? (I have searched for Caiman bass mod)is it the MLC 5/6 mod?