Any chance you could provide a bit more detail on modifying the DVP-S7000? I just picked one up. I'm reasonably comfortable using a soldering iron, but otherwise pretty much clueless when it comes to electronics. Not sure I could identify the audio board, let alone an op-amp. A few photos would be very much appreciated if you have them.
I have a Sony 999ES and have done MANY mods to the player.
Part Swapping (Caps, Power, Resistors, OpAmp), New output stages, New clock.
Part swapping is just that, part swapping = improvement, but minimal and sometimes real hit and miss. This is where people have been ripped off with mods. A few dollar worth of parts, many many hundreds paid for it, minimal if any change in sound.
New Output Stages - Modwright (Tube Output Stage) and Vacuum State (SS Output Stage) offer mods to completely replace the output stage with their own. These stages have no OpAmps, and minimal number of parts to get in the way of the signal. Output Stage = One of the best mods to have done.
New Clock - The Terra Firm Lite and Uber Clock from Vacuum State - Probably one of the greatest changes to the sound of a player other than the new output stages. A new VSE clock is a MUST IMO.. The two versions are for internal or external. A benefit with my player is the new clock not only was for two channel, but since my player uses a single master clock, it also improved the sound of MCH SACD playback - a real bonus.
Who would I recommend for Mods? Modwright of VSE. Both offer great mods, and both offer the ability to REMOVE the mod if you are not happy with it and return your player to stock. They also warranty their work and will also perform any other work on your player if you need it. When I had the new output stage put in my player, I also had a new Laser put in. Another bonus of Modwright and VSE is they are not just MODDERS who come and go in the night. They are also very involved with other audio components in their company - amps, pre amps, etc.
I have just under $3k invested in my player (Player Cost + Mods) and the only stock player I have heard which would make me want to give up my modded player is priced at $9k.
Stop by the Asylum and read posts by completely satisfied customers of Modwright or VSE modded players. Modwright has their own forum over at Audio Circle and VSE folks stop by the Asylum.
Here is a quote from someone who purchase the new Sony 5400 and had Modwright do their mods:
Wow! I recently had a Sony SCD-XA777es player. It was built like a tank, but the CD and SACD performance of the 5400es with ModWright mods is simply stunning. I spend most of my time listening to vinyl on a $20k+ rig, and this 5400es has the organic energy of what I love about vinyl (not sure if it is the tubes?). Fluidity, musicality, transparency, dynamics, black background, large sound stage, layering, are the words that come to mind. And like vinyl, what I'm hearing is SPACE around, to the side, behind and in front of instruments. Dimensional and engaging with large sound stage but rock solid imaging, not flat or etched like most CD players sound to my ears......
BTW - I am NOT affiliated with any companies mentioned in this post....