Hi, If you contact these Aust guys-they should put you in the correct place.
I personally did not care for the Suprateks--too slow-even the Bent TVCs blew them away.
D
http://www.stereo.net.au/forums/showthread.php?t=11377&highlight=Supratek
Supratek Cabernet Preamp
Now that Supratek is out of business who can I get service from? When I turned on my system got a loud pop out of the loudspeakers but no sound. I checked the 4 amp fuse and it is good. I took the pramp out of the circuit and ran direct from the CD player and everything is fine. Something in the pre is amiss, what can I do?