Mods for a PS Audio HCA-2?

Fiddler:
With my Marantz SA-14 playing the Mozart Piano Concertos on SACD, I'm hearing no sustain at all on piano key strikes... my stock HCA-2 adds too much warmth and obscures some of the detail. Also aggravating is how the higher notes drop big time in dB, they just don't stand out as they should.

Not entirely sure if this is due to the amp or source, since I replaced both (the SA-14 replaced a SONY DVP-S9000ES which sounded truer on piano). So would the amp mod help both the sustain and lack of dB, assuming the amp's at fault?? I really want to keep this amp for all its other considerable virtues. TIA!

Thanks Warren!

L milton:
Currently using the SA-14 (NBS cord) to a Meitner Melior pre via a Totem Sinew I/C, with a cryoed Meitner I/C from the pre to the HCA-2 ($1000 Tekline cord). I'm running Camelot Black bi-wire to Sig 805s on good stands.

The SACD in question is one of the original SONY single-layer discs that may in fact have been recorded in opposite phase, so I'll try switching L and R tonight. Once I upgrade to the PCA-2 pre it'll be nice to do that with the press of a button!

I believe the disc itself is flawed, since other piano tracks I tried the next day sounded very fine. The HCA-2 really is a remarkable amp: massed violins have a beautiful sheen to them - may not be entirely accurate, but extremely musical. Piano is not quite perfect, so I'm anxious to try the Blackgates and silver output wiring...

That silver won't be too BRIGHT I hope??

Ears:
Have you heard an asi-modded HCA-2? Just curious how Jensens compare to B-Gates and what the rest of the mod contributes... TIA

Oh you just gotta love the forum concept - most educational...
OK, where do I get BGs cheap? (ie. inexpensive!)