Mod your Beresford 7520

[Affinity]

just want to ask

the opamp roll, affects the headamp or/and both rca?

There are two op amps, one for line out and one for headphone out.

[dikyllis]

There are two op amps, one for line out and one for headphone out.

which is which, left for line out or headout?

[Maximum]

Anyone else tried the OPA2107 yet? Installed it in the line out today, and an AD826 in the headphone socket. It's staying in there I think, as it seems to be doing a really good job. Cleaner and more focused than the 4032 I reckon.

The AD826 I still haven't given a proper listen to yet, but seems nicer to listen to with less nasties than the 4562 on headphones. I plan on testing the 2107 on the headphones once its been run a bit, to see if its worth sourcing a second one.

[StanleyB]

Which other British DAC offers all these possibilities for experimenting with opamps and DAC chips?

Stan

[leo]

Finally had chance to listen to the 7520 (mainly fixed output) , people who know me will say I'm a picky scroat which is why I normally stick with diy, also I enjoy fiddling

Anyway I must say the 7520 is a nice little dac and certainly one of the better commercial offerings! its midrange is sweet and quite weighty which I found surprising, I recently repaired a modded TC-7510 (mod21 and Mod21 pt2 ,LM4562) IMHO the 7520 as is betters it, certainly more there in the vocals and a more involving listen to my ears

Any gripes? for what these sell for NO! I'd like a bit more depth , a bit more focus etc but bear in mind this is a totally stock unit.
I've been busy with work but was thinking of doing a Sticky thread for mods/tweaks etc as soon as I can seeing as nobody else bit when hinted a few times , it will hopefully make things easier for folks to find since this thread is getting huge

[leo]

Anyone else tried the OPA2107 yet? Installed it in the line out today, and an AD826 in the headphone socket. It's staying in there I think, as it seems to be doing a really good job. Cleaner and more focused than the 4032 I reckon.

The AD826 I still haven't given a proper listen to yet, but seems nicer to listen to with less nasties than the 4562 on headphones. I plan on testing the 2107 on the headphones once its been run a bit, to see if its worth sourcing a second one.

Will do soon

Heres a list I intend on trying

OPA2132
LM4562
THS4032
OPA2107
AD826
AD8066

what ever others I have

[StanleyB]

I have had a play with some TPA6120 opamps, but their ultra extreme slew rate and bandwidth scares me. The LM4562NA with MLC5/MLC6 mod is good enough for the majority of my own listening experience with my audio gear.

STan

[leo]

I have had a play with some TPA6120 opamps, but their ultra extreme slew rate and bandwidth scares me. The LM4562NA with MLC5/MLC6 mod is good enough for the majority of my own listening experience with my audio gear.

STan

Just tried with LM4562 for fixed output first with MLC5/MLC6
and then with these caps removed

Loads better with them removed if using 4562 lets this op-amp breath and its well stable

I didn't rate LM4562 in the second position, its not that great at driving capacitive loads , I'll have a closer look at the circuit later, didn't notice if theres low value resistors on the op-amps output
I'm now running AD826 which so far works well


TPA6120 is quite a beastie , AD815 is similar, Walt Jung written a few articles on the 815

[lupo_yellow]

Hi all,
do you think The AD826 would be a good choice to use with Sennheiser 650's?

Thanks

Kevin

[StanleyB]

The LM4562 sounds brilliant with my HD650.

Stan