We had a discussion on this amp's initial intro in 2006.

The Groove tube SX100. I went to Guitar center and they let me try it for 30 days. I took it back the same day. I wasn't impressed.

http://www.synthzone.com/forum/ubbthreads.php/topics/92205/Groove_Tube_SFX_100

Regards,

JerryGHR