Mod your Beresford 7520

[trailer]

Received my AD826's today.



Very very good.

If you get your 7520 "Wolfsoned" make sure you order an AD826. Like Ken has mentioned the sound is very refined and smooth. Just like it should be.

Thanks for the tip!

I checked out the optical again whilst I had the unit unplugged. Same old popping on the right channel. It isn't the optical cable as I checked it on the DVD player. It isn't present on the co-ax. I checked pretty much all of what you suggested Leo but nothing obvious appeared.

[Maximum]

Anyone using the AD826 with a THS4032 in the line-out socket? If so any problems?

Are you using the 826 in the line-out too? I am wondering, as I'm sure many are, if it gives better results than the 4032.

[sponge]

Anyone using the AD826 with a THS4032 in the line-out socket? If so any problems?

Hi Rob,
Personally, I lost a bit of favour with the 4032 - Can be a great sounding chip, no doubt about that, but I couldn't live with it's little problems (instability?) - clicking between tracks etc. So I now use a LM4562NA in the line-out socket - Still a very good sounding op-amp, but much better behaved.

Ken

[machinehead]

Please advise what is involved in fitting a 7520 with the OPA627's?
Do you need to double them, or is it still two total? Any adapters necessary?

I see they come in an 8 pin confige, but they are PDIP not MDIP.

[sponge]

Please advise what is involved in fitting a 7520 with the OPA627's?
Do you need to double them, or is it still two total? Any adapters necessary?

I see they come in an 8 pin confige, but they are PDIP not MDIP.

The OPA627 now has a big brother - The OPA827 - Maybe you would like to try that?

Either way, you are better obtaining a pre-mounted pair of SOIC's on a single adapter like these here:

http://cimarrontechnology.com/twopre...020302s-1.aspx

Hellish expensive especially if you are upgrading both op-amps in the 7520. Not worth it IMHO, but if you decide to go for it - Let us know how they sound.

Ken

[TeTsuo36]

Hi all,

i have had my 7520 just over 2 weeks now (burning in 24/7) and it is very good quality. I had bought dual OPA627 on a B/D adaptor from a UK guy on ebay. (art of sound user: apmusson) on this thread, also bought one, so hopefully he will comment on it too.

Impressions were positive yet i had a weird nagging mixed feeling. I am not good at describing sounds but here goes. Firstly it was very, very smooth, velvety infact. Very detailed and clear but really soft with it. Bass was reduced compared to the THS4032, with not as much impact. Acoustic music was really very beautiful, brought big smiles all round, with a hint in the back of my mind that it didn't sound real in someway. The 4032 just seemed to present the music really honestly, whereas the OPA627 seemed to be doing 'something' more to the music, to give it feeling of liquidity. There was certainly an ethereal quality to the sound, extremely delicate and refined if you like, a little like a dream v reality.

I can't say i could choose a winner out of the OPA627 and THS4032. I had some friends round on Saturday and we knocked out a load of varied tracks and i put the THS4032 in and it worked really well. But sometimes late in the evening if i want to listen to something like Sheila Jordan or Diana Krall the OPA627 will be going back in and i can be transported to a different world.

Not exactly scientific i know.

Regards, Mark.

[prenzlberger]

I did it ... installed a pair of LM4562NA in my TC7520!

For you seasoned rollers, this may just be worth a yawn, but this old man here had never opened any piece of equipment before ..... and it was a breeze. (Thanks, Stan)

I didn't do it, because I was missing something in the base 7520's sound, but rather, because I was inspired by you guys.

Did it bring something? Well, yes, it did.

I listen primarily to chamber and small ensemble music, which thrives on openness. My STAX electrostatics are superb for that type of music.
Replacing the OpAmps has resulted in what I can only describe as a more analogue almost tubey sound.
I believe the entire midrange becomes richer, which benefits celli and voices in particular.

Now, I also need a small, portable USB DAC/Amp for my iPhone, which I could take along on business trips. How about, Stan?

[Covenant]

Beware Prenz, you are on a slippery slope to DIY land....
I am thinking about building a pair of monoblock amps from kits just because I changed an op-amp.

[Puffin]

Steady on old chap.

[Covenant]

Steady on old chap.

Strictly no soldering-just wires to connector blocks. I can hear you tut tutting from here.