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daveyboy
14-02-2010, 02:52
Hi guys I have had an op amp LM4526 fitted to this dac, as well as the Wolfson dac but tirna have informed me that I don't currently have the mod 21 chip. Is this worth having done also?

Stratmangler
14-02-2010, 09:36
Hi guys I have had an op amp LM4526 fitted to this dac, as well as the Wolfson dac but tirna have informed me that I don't currently have the mod 21 chip. Is this worth having done also?

Mod 21 involves swapping out the original opamp for a LM4526. It's a surface mount I/C.

What's this Mod 21 chip they're on about ?

Chris:scratch:

Maximum
14-02-2010, 13:20
I thought this was mod 21....

http://www.homehifi.co.uk/Downloads/Mod21.pdf

Stratmangler
14-02-2010, 14:10
I thought this was mod 21....

http://www.homehifi.co.uk/Downloads/Mod21.pdf

There are 2 pdf files detailing Mod21 - one details the opamp change.

There's also the wire link mod to perform as well.

Chris:)

daveyboy
14-02-2010, 15:21
I was about to upgrade the other one which came in the Sony Viao box when I noticed that it did not have the mod 21 upgrade (2 off 220uF electrolytics and 2 off 22uF electrolytics changed to 47uF electrolytics & 2 resistors replaced by zero Ohm links).

Hopefully the above email response I had from them clarifies things?

Stratmangler
14-02-2010, 19:37
If you dig through this thread you'll find links to both Mod21 pdf's and also the wire mod http://theartofsound.net/forum/showthread.php?t=1811

Chris:)