If you want to save some real money and get one of the best used preamps available, check out the Adcom GFP565 which is listed right now on A-gon. I had a 565 for nearly 4 years, and can vouch that it's an excellent unit. If you have an analog front end, this preamp also has an excellent phono stage. The one I just saw listed is selling for $325.
need decent cheap pre amp to drive
bought pair of maggie 1.6qr speakers.have carver 500t amp and carver c1 pre.need a little more bass.what to do? want to spend under 750.00