Sony 9000ES: DanWright or StanWarren Mod

>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.

Rpell: In case of 9000es (as well as ohter pieces he upgraded for me: MSB Link, Stax headphones, Adcome amp) Stan Warren esoteric design means better (or much better )SOUND. regards. Simon

Simon: I'm sure Stan Warren's modifications are an improvement over the sound of the stock units--as are the less-extensive modifications offered by other modifiers. I would be interested in hearing more about any comparisons between the various modifications available.

Clarification: I should have stated: " Stan Warren's output stage offers unparralled sonic and electrical performance, as compared to ANY "drop in" replacement, that is available to the other modifiers. This makes his gain stage very esoteric indeed."

As a former Sales Enginner, who has represented a high performance IC's manufacturer, with 1200 different types of IC's, this is my qualified opinion.

Stan came up with his circuit design based on sonic comparisons of various circuit implementations, and compared them to these "drop in" replacement devices.

Stan has not always implemented his proprietary circuitry.
In his modifing past, he also used and implemented the best of the best "drop in" gain stages. This qualifies him to understand all of the variations, and their inherent sonic performance charactaristics, along with their limitations.

I have personaly told Stan to charge MORE for his services. I feel that many people overlook him, because they perceive him as a budget guy's modifier. In reality, he is nothing less than world class.

Is there anywhere online where I can find some specifications or details about his modifications? Thanks.