Here are my beloved pair of GT 400 Mono Block Tube amps. These will drive any speaker in the world period. These were upgraded with special parts by Paul and he went through them a year ago and did every current modification and upgrade to the absolute latest version and fitted them for the KT120's. They also come with a new set of sventlana winged C KT88's (20 total) you can roll to see what you like. These work flawless and sound amazing. The tubes have less than 6 months use on them and the tubes test like new. I have two sets of 6sn7 and Russian 6h8c my personal favorites with this amp. I have crates, custom built stand, and Custom built 220 volt power cords all from TRL, I can have it 110/220 volts no charge. These are simply the finest amps in the world and if you are reading this you know it. Condition is 7/10 very good they are one of the last pairs he had made. Will ship anywhere in the world. Buy with confidence from a longtime audiogoner. Will entertain resonable offers.