Unison Research S9

This valve driven amplifier would be a guaranteed talking point if it was a part of your kit. We can't help but love its quirky styling and great soun

This amp is horrible. The shrill of the SV572 sounds thin ,sterile, annoying and makes you want to leave the room and make coffee. Sounds loud and powerful but you just keep turning it down. Change i/p tubes to amperex then mullard and still not enough...