Mumum,
I just bought the Preamp from another Agonner...I'm new to audio so I'm no help but am waiting to hear what others have experienced. Have you seen the reviews??
http://www.hometheaterhifi.com/volume_9_3/cary-cd-308-slp-88-rocket-88-9-2002.html
and
http://www.enjoythemusic.com/magazine/equipment/0803/carygr8.htm
MC