Mod your Beresford 7520

[therockst4r]

The Caiman is +10v but as Stan already mentioned the Moon requires +/-9v ( +9v to ground and -9v to ground) total is 18v

Only other thing is run it from a seperate supply

Right, my mistake I thought I read that the Caiman was +/-10v. It would be interesting to try it with a separate power supply, but probably not worth it.

[larry]

Hi all,

I guess I have found a solution for people having distortion when using 7520 as DAC/AMP with 2 THS4032 installed and using computer as source(mainly foobar) or when playback on a low volume. I am using foobar with WASAPI connect to 7520 through optical cable. I have a song keep having distortion at a specify part. What I do is that I lower the foobar volume to the lowest. I turn the volume knot on 7520 to around 3 o'clock for my HD 600. Then I slowly increase the foobar volume. Increase to a volume where distortion alway comes in. Guess what, The distortion is gone. When I do the other way round. I max out foobar volume and increase the voulme from 7520 knot the distortion come back. I also just an IEM during this test. The distortion really gone alot. I still heard a bit due to IEM. hope this help.

[ZebuTheOxen]

Hi guys, just thought I'd drop in again after my last post and report back.

None of the other opamps I tested were worth their salt.

I cut the MCL 5 / 6 caps and put the 4562NA's back in and this basically rendered everything else a waste of time.
No amount of fiddling with other opamps had anywhere near the same result.

Cut the MCL 5 / 6 with some wire cutters, put in dual 4562NA's, sorted.



Looking at upgrading the DAC but I think my soldering skills still leave something to be desired.

[Gazjam]

Zebu,
can I recommend Tirna Electronics to do your Dac mod for you?

I was running the 4562 with Ml5/6 mod and had my Dac chip upgraded to the Wolfsen by them.
Quick turnaround good price.


The improvement will surprise you.

[ZebuTheOxen]

I'll get in contact with them later on tonight, £40 sounds reasonable.

If I fall off my chair because of it, I'm holding you responsible

[Gazjam]

I'll get in contact with them later on tonight, £40 sounds reasonable.

If I fall off my chair because of it, I'm holding you responsible

If Im wrong I'll eat my hat. (probably)

[marscay]

How many have messed around with opamp swaps on the Caiman?

After some heavy listening throughout the week i started to get the feeling i had lost some emotion or 'fun factor' with the stock Caiman versus my 7520+TH4032.

The WM8716 is a good upgrade but i just don't enjoy the 4562NA with my gear, on the Caiman nor the 7520. Although more thansparent than the 5532 (which sounds ok in a Caiman actually) i just find the 4562NA too sterile and a tad bright partnered with the 8716.

Enter the fabled TH4032 on the Caiman which was my preference opamp on my 7520, my initial response was WOW but after testing a few albums as others have found out it is just too strong on the upper freqs and gets tiring very quickly ....but amazing resolution for acoustic tracks.

I have settled on the LT1364 for now, much less fatiguing than the 4032 but with around the same amount of resolution ...i don't know if it's a keeper but it is sounding very good and this particular opamp doesn't have many hours on it so it may actually improve some yet.

Would like to try the AD827 next as these sound like they be the perfect opamp for me going by Trailers findings. The 8716 is really nice though, even the NE5532 with it sounds quite detailed but it is just a little muddy i've found.

[trailer]

AD826

Do a search for it on here and you'll get a few posts.

[marscay]

AD826

Do a search for it on here and you'll get a few posts.

Cheers mate.

You happen to play around with a OPA2107 in the Caiman also?

[trailer]

Cheers mate.

You happen to play around with a OPA2107 in the Caiman also?

Can't remember (!) but I don't think so.