After 1 week of playing with the audio playback of the playstation1, I highly recommend using this as an alternative to more expensive cd players. I tried listening to the stock unit for 3 days and thereafter made the appropriate mods. I removed all the caps connected to the DAC, then attached a MKP cap directly to it, with the other end of the cap connected directly to the rca outputs. One thing I immediately noticed with the mod is the harshness in the highs caused by the electrolytics was definitely gone, in fact, the highs are bit more extended than before. However, as regards the low end, since my speakers don't go beyond 40hz, I didn't notice much difference in that department. As before, this cd player is very very quiet, and like any good dac, its ability to resolve really minute details in music is quite amazing. Another thing I noticed with the capacitor change pala, the tonality of intruments seems more accurate now.
Here are some pics I took with my celfone:
This is a pic of the psx with the regular controller attached for playback control.
This is another pic, but with the IR module attached, now I can use my remote to control the playback
This is a pic of the topside, if you'll notice the red thingy sticking out from the bottom, that's a big 3.3ufMKP capacitor used as DC blockers. The white thingy you see there is a styro I used to push the lock to have the psx in playback mode, tinanggal ko na kasi yung top cover, di masyadong maisara because of the big capacitor.