(240 VOLT UNIT) GS-35B 4000+Kw Peak. DESK TOP GS-35B TUBE new Test full output ALSO HAS HEAVY DUTY 1 AMP POWER TRANSFORMER SURGE TO 1.5 AMP. HAS INPUT AND OUTPUT TUNING. bias diode voltage dropping assembly, The assembly is used in For CT circuit of the RF chassis to set bias to the tubes. This adjusts the resting current of the amplifier and sets the class of operation. This amp is ran on 240 volts AC with a 25 amp of draw. 25 watts key and 200 watts peak input drive MAX ! gave me800++ watts RMS and 4000+ Swing watts.. ....BIG AUDIO. I have heard of others driving more watts in to this model of amp and seen more watts but that is all up to you