Yamaha DSP-A595 Mod

[lectrolux]

Hi I got a Yamaha DSP-A595 I would like to mod it but I have a few questions.

Its an AV amp but I only use it as a stereo amp, it got a good review for it's AV abilities however its stereo verdict was said to be lacking in the mid range.

I have an anologue signal coming into the amp and would like to change the output op-amp which is a NEC4570c (dip8) to a DIP8 IC Socket Adapter and then roll a few different op-amps, as well as change the 2 power supply Capacitors.

1. Will I run into any problems just changing the main speakers op-amp(and not the other 2 op-amps for center rear fl+fr etc).

2. Any recommended op-amps that will fit and potentially open up the mids?

3.The 2 power supply Capacitors are 8200 56v although the service manual states they should be 6800 56v can i replace these with 8200v 63v and/or 10000 63v in theory?

Many Thx

 

[lectrolux]

Anyone?

 

[pacificblue]

1. Will I run into any problems just changing the main speakers op-amp(and not the other 2 op-amps for center rear fl+fr etc).

No, that does not matter.

2. Any recommended op-amps that will fit and potentially open up the mids?

This lacking-in-the-midrange is a bit strange, because that is where least problems are to be expected. The usual suspects depend on your budget. The cheapest solution and probably best-bang-for-the-buck is the NE5532A, followed by OPA2134. If you want to invest more, this may be an interesting thread for you.

3.The 2 power supply Capacitors are 8200 56v although the service manual states they should be 6800 56v can i replace these with 8200v 63v and/or 10000 63v in theory?

You can do that. What do you expect to happen when you replace one 8200 µF capacitor with another?

 

[lectrolux]

Thx for the reply pacificblue,

From what ive read ( not actually tried it yet) changing the power supply Caps to a (subjectivley) supieror one may enhance the sound, and for the relativley small cost im willing to give it a try.