Quote Originally Posted by Freewillisdead112
The 555 has a built-in power cord. I was checking them out on ebay, ones sitting for $75 bucks!

How does a passive work, I have never messed with one. The 505 is sitting at $45 with no bids right now.

That creed seems a little steep for $600 bucks. Is it worth it?
I saw the Creek for $225 on Audiogon before I mentioned it. There's a purity advantage with the passive preamps, as long as they have a quality volume pot. I have owned a GFP-555, a GFP-565 and an SLC-505. My favorite was the GFP-565 by a considerable margin, but the cost difference above the GFP-555 is usually quite a bit. If you can afford options like Audio Research and Conrad-Johnson, I'd say the Adcom/Creek discussion is a moot point, though.