[xtreme4099]

Anybody try switching op-amps on the M-audio Revo?

not sure what they currently have ...

but some people have been toying with their audigy cards on headwize ....

http://headwize2.powerpill.org/ubb/s...0&srch=audigy;

http://headwize2.powerpill.org/ubb/s...0&srch=audigy;

 

[MegaMeee]

what opamps come on the revo? anyone for some magnifying glass work?

 

[300_baud]

5532 opamps. I've done a direct comparison and the modded audigy 1 is more transparent than the maudio. I believe it's because the maudio has output caps. (22uf electrolytics.)

 

[MegaMeee]

just out of curiosity i looked at my fortissimo 3. tons of 10uf electrolytics close to the output jacks so they might be output caps. noticed a tpa122 chip, that might be something

but i dont really know what im looking for

there was some other relevant stuff but ill have check it again. regardless im not considering doing anything, soldering/unsoldering surface mount stuff is something i never managed to master

there was also something that said 33078, mc33078 or something unrelated?

 

[lan]

Interesting, what is pin compatible replacement for this 5532?

 

[puppyslugg]

Quote:

Originally posted by lan Interesting, what is pin compatible replacement for this 5532?

op2132, ad8620, etc.

 

[ablaze]

how many 5532s would have to be replaced with 8620s?

 

[300_baud]

if you're only concern with front left and right channels, then just one opamp.

 

[jeffreyj]

Quote:

Originally posted by ablaze how many 5532s would have to be replaced with 8620s?

Have you run the RightMark Audio Analyzer on your sound Card? Get the latest version, RMAA 5.1, so that you'll at least have a baseline for the technical specs. If the sound card has more than one output pair, please do yourself a favor and modify only one output at a time. Just willy-nilly replacing op-amps in commercial equipment - especially if the op-amps in question are already very good! - is not likely to produce meaningful results.

Of course, it would be far better if you actually A/B tested say, the rear channels with the stock op-amp and the front channels with the "new and improved" op-amp, because then you'll really be able to take a hard look at what your money got you (the 8620's aren't cheap, and believe me, most of what you are paying for in them are their stellar DC specifications!)

edited bizarro grammar mistake

 

[xtreme4099]

Quote:

if you're only concern with front left and right channels, then just one opamp.

yeah but which one ...8 channel card ..and 8 op-amps ...anyone have a clue ...i got two spare ad8620 's ...

 

[dokebi]

Can the soundcard even provide enough power to the opamps to make a viable difference?

 

[ablaze]

ok. enough talk what say y'all?
somebody get down to actually doing it and post the details!
I'd like to get down to it myself. but my only DIY experience so far is with cables

 

[guzzler]

i'm not sure a PC would supply clean enough power to warrant using a high-end amp like the 8620 or OPA637 or similar, for me an OPA2134 or similar mid range op-amp would be a sensible and cost effective choice...

if the 5532 is used in the Revo, it's worth considering that it's a bipolar opamp, as opposed to a FET input like the majority of OPAs we use, so jeff's suggestion is a good one, to only replace them one at a time and A/B them...

g

 

[ablaze]

for some of us, the AD8620 was 'free'
so its almost at no cost that the opamps are changed.

somebody give me the full instructions to do this (for the front 2 channels)

 

[guzzler]

hmmm, abuse of the samples program me thinks (smack me with a wet kipper if I'm wrong

)

you're going to have to remove the existing chips, so you can either cut the original chips off and then try and get rid of the remaining solder and bits of the legs, or you can try solder wick to remove all the solder from the 5532 and then you might even have a 5532 to play with at the end...

to solder the new one on, tape it in the requisite position and then "stroke" solder onto the legs...

g