Audio research m300

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.