That's right, the
600,
not the 300. I'm considering selling the last of the three I had. Killer amps and you never seen them - not too many made as they were around $1400 new if memory serves. These units are extremely well built (in the USA) and have a massive power supply. Plenty of power with 600 watts into four ohms - very honestly/conservatively rated compared to a lot of the stuff out there. Easily as loud as the M6 Carbine IME. Also includes footswitch (worth $100) which allows you to blend the two channels together so you can run one clean and the other dirty.
Price is $SOLD!, add $10 if you are west of the Mississippi.
Here's a quick video I made a while back:
Tech 21 Landmark 600 and SWR 12-Stack 4x12.MOV - YouTube