Phono stage help

The GCPH's power supply already has fairly fast recovery diodes, from the factory. It responds very well, to the addition of HI-FI Tuning's Supreme fuse and an upgraded PC. I've always recommended the Zu Mother, but- they have been discontinued, and are nearly impossible to find used(don't know if the 'Event' is as good). Any of Synergistic Research's better PCs will provide an obvious performance gain, over the stock cord. Don't skimp there and you'll be pleasantly surprised. Two tweaks that can easily be reversed, should you decide not to keep the unit.

Largely; the answer(re: the GFP) would depend on the output of your cartridge. There is only so much gain available(60/66dB), with the GCPH. If you are using a very low output moving coil; there may not be enough voltage, at the GCPH's output, to drive your power amp to satisfying levels. If you already own the power amp that you intend to use: give it a try now.

The Shelter has .5mV of output, which may be enough, depending on your need for volume, the efficiency of your speakers, room size, and the levels at which your vinyls are recorded(which vary widely). note: One of the noticeable benefits of the mentioned upgrades, is an increase in dynamics. Happy experimenting! BTW: what cables are you using?

Heroes are a nice interconnect. They were the first Kimbers that I tried. The farther up the Kimber line you progress; the more of everything good you will hear from your source. I'm using KS-1030's and a Synergistic Tricon Analog(KS-1130's on my CDP).