Audio research m300

I still say try an active preamp if you need more volume.  Your Krell puts out plenty of juice that should be able to drive your speaker to high volume levels, but your use of the Wadia volume control does limit the gain you can put into the Krell.  This may be one of those situations where adding another component in the chain might offset the more direct route of going from the CD player to the amp. 

My WADIA does have gain level settings. I did have a audio research ls 15 that I sold recently. I called thiel to pick their brains on the power amp that they used to power the thiel' back in the day. They told me that they used a Krell fpb 600 . I'm reluctant to purchase one of those beasts with out ever hearing one. My ksa has a nice tube sound with the good solid bass. 

The LS15 has a skeletal sound and no bottom end either.  You need to hear a better sounding preamp.  The VAC line of preamps will make you say wow!

i will give them a look. Thanks, Mark. 

anyone know hot to get parts for M300?i ve tried the manufacturer in Minneapolis, they do not answer.