I have owned the Adcom GFP-750 and found the active closed in and bright, the passive was smoother but a Placette Passive was way more natural. The adcom was also grainy to me. Keep in mind it is a great deal for the money but when you hear a great preamp (or don't hear the preamp) you will be utterly amazed. I was comparing it directly to a Placette Active and a Rowland Synergy IIi both considerably more money but it was a no contest that they were 5x better.
The other thing to look at is that your Silver cables might be making it worse.
Can you run the Shannling direct to the amp? I thought it had an analog preamp built in?
The other thing to look at is that your Silver cables might be making it worse.
Can you run the Shannling direct to the amp? I thought it had an analog preamp built in?