Pardales, I am sure that Mike from Hot Rod Audio Mods can give a better explanation of why he decided on using my Master Clock.
"They say that just replacing the 3910's clock with the APL clock is the biggest improvement that can be made to the 3910. Can anyone speak to this"
What this means (and Mike can confirm it) is that a Denon 3910 upgraded with fast Op Amp modules, Black Gates, Harris Diodes, Super Clock 3 and other "exotic" parts can not hold a candle to a stock Denon 3910 with JUST my Master Clock installed.
Of course, Hot Rod Audio Mods are friends to APL Hi-Fi and our products are not in any competition.
Regards,
Alex