Harmonic recovery System


Not reall an amp, preamp question, but has anyone used this tweak.
I think its basically an added gain stage. If anyone has used it , please let me know youre impressions. Thanks
shasonmusic
Jayctoy,
May I ask which one you like better, the AH4000 w/ upsampler or the Sony 9000ES w/ mod?
KK
Ykk the Sony 9000es mod is three times better than my
AH,the only reason why I put it on my main system,
Is too experiment.The Ah is a very very musical cdp,
in my system, thats what I am hearing.You cant go
wrong.I like my sony better of course, the sony mod
does 3D presentation,the bass is excellent.
How much is the mod to 9000es, and where can I get it done?

What does it do - how does it improve the sound?
Is the stock 9000es pretty good as well?