The Krell KAV-250a is the clear winner by a WIDE margin here!! 500 watts rms into 4 ohms, per channel. VERY HIGH CURRENT, so build a dedicated 30 amp circuit...Around $2000 used.
Quality used amplifier needed
I am in the process of upgrading from an Adcom 555mkII that has been modified. My friend has a Threshold S300mkII that I have heard on my system and it sounds fantastic. Are there any other used amp I should look at in the under $2000 range. My speakers are 4 ohms and I feel I need an amp that put out 300 watts at 4 ohms and is also able to deliver high current. Thanks, CS