Adcom GFP-750 Modfication Question

Improvements are as described by Lmack and Ritteri. I would not recommend just swapping out the caps yourself since the values used by Stan are not exactly the same as used by the mfg. However, the improvements are noticible immediately and the unit will continue to improve. I almost always used it in active mode, which I believed provided more lifelike dynamics. The preamp was bettered overall (in my system) by a Muse Model 3 Signature. - Good luck.

A very important question: Is there any way the sonic performance of the active stage of the Adcom GFP-750 could be DOWNGRADED by having the caps changed to Black Gates, compared to stock? My system sort of sounds dark and warm to begin with.Would there be too much warmth and an even darker sound by going with the Black Gates? Is there any improvements to soundstaging, imaging, and/or image focus by going to Black Gates? What exactly happens to the top-end when going to the Black Gates? Does it stay the same, open up more, gain detail, or does it sort of darken and become more laid-back? Your detailed input would be greatly appreciated.

So I have this pre. Can anyone tell me the cap numbers (on the board)? Because I see my C23 - C25 -C27 are looking bad. But this is just the power supply. Not the audio stream. I can replace them, but not sure if this is the mod or not...

Musical Concepts still does an extensive mod on the 750. Check their website for info,they have been modifying Adcoms going on 30 years.