Sony 9000ES: DanWright or StanWarren Mod

Any mod done on a Sony voids the warrantee period!The PA1 and PA3 have authorized Dan Wright for the mods.Sony and other companies have not.Big difference.I have heard nothing about good things about all the gentlemen mentioned above.

Hi: Stan Warren modified my 9000 about half year ago. Improvment over the stock was spectacular, price $250.

I bought a Pioneer 525 full mods from Mr. Wright out of Audiogon @ 6mos ago (Blackgates, gold RCA's, damping,IEC, etc.). Very happy. I use it only for HT, but bass, articulation of voice etc. on audio is quite good. Its pampered w/ Electaglide Ref PC & IC (both very dynamic for HT), Harmonic component cable. It does not feel out of place.

As an Electrical Engineer myself, I can attest to Stan Warren's abilities. He is the only, and I mean only modifier, that is offering a custom designed ,proprietary output stage, that is world class by any standard, in the audio world today.

There are many things you can do to modify these players, different caps, jacks, wires, power supplies. But the single largest improvement in sound quality comes from stripping out the stock output devices, and replacing them with much better performing gain stages.

To my knowledge, all other modifiers are just swapping the output devices with better IC's, or other types of "drop in" replacement gain stages. This is not nearly as heroic, as actually giving you an entirely new esoteric circuit, that has world class slew rates, settling times and symetrical electrical behavior.

If Stan Warren charged nore for his services, I feel that many more audiophiles would take him more seriously. He is that good!

>all other modifiers are just swapping the output devices
>with better IC's, or other types of "drop in" replacement
>gain stages. This is not nearly as heroic, as actually
>giving you an entirely new esoteric circuit, that has world
>class slew rates, settling times and symetrical electrical
>behavior.

To be fair, many of the ICs used as replacements can be said to offer world class slew rates etc. And the modifiers in some cases may also bias the devices' output stages into Class A to further improve performance.

Is there anywhere to go to read more about the general circuit design approach used by Stan Warren? I'm sure you would agree that "esoteric" doesn't necessarily mean "better."

Certainly, though, his work seems to have received unanimously excellent reviews. And I agree, his services appear to offer an excellent value.