I have a PS1 Model SCPH-5501 connected to my system and it has been giving my Onix XCD-88 CD player (virtually identical to the Music Hall CD-25.1) a good run. To my ears, the sound is more balanced across the frequency spectrum, imaging and soundstaging is improved and I can hear details that are less prominent on the Onix player. In all, I am very pleased with the results and I agree with Jeff Day's observations from Six Moons. The SCPH-5501 is a slightly improved version of Model SCPH-1001 in that the laser assembly was repositioned away from the power supply. Also, the SMPS in Model SCPH-5501 was changed to a unit that generates less heat. Lastly, the laser had been designed to autobias itself to avoid issues with skips and drop-outs experienced with Model SCPH-1001. Model SCPH-5501 does not have RCA audio output jacks, but it does have a lesser quality A/V multiport jack. Sony's multiport cable includes a breakout to two leads with RCA connectors for analog stereo audio and another RCA connector lead for composite video. This output arrangement does not include OP amps in the signal path that could potentially degrade clarity. I think Model SCPH-1001 can be a good CD player, but I like Model SCPH-5501 as it represents an overall physically improved design while using the same AK4309AVM DAC and audio signal topology.
As others have reported, the PS1 does sound better after leaving it on for some time. The difference from a cold start-up to being on for some time is clearly audible. I am certain that skeptics abound regarding burn-in, but I trust my ears more than others' opinions, and the sound from a Playstation can definitely compete with good CD players. Is it equal to $6,000 CD players? I doubt it, but it is very musical and it has earned a place in my system. I was a bit skeptical about the PS1 hype myself, but Jeff Day of Six Moons is a reputable audiophile writer and his observations of equipment he has covered has been "spot on." Before dismissing, try it out and give it a fair chance. There will be many who will not like the sound regardless, and that's fine. Your trashing of the PS1 will keep prices low for those of us who appreciate its merits.