This amplifier can not be ran at any Voltage over it's intended 112V AC, So you'll need a Variac to run this Amplifier. MOTOROLA 6V6GT MONOBLOCK MODEL HS-632 TUBE AMPLIFIER 5K23M-1A W/ SAMS PHOTOFACT, Amp brought up on a Variac over the course of a day, Test results shown in pics.Amplifier is as shown in pics complete with tubes.. The item "MOTOROLA 6V6GT MONOBLOCK MODEL HS-632 TUBE AMPLIFIER 5K23M-1A With SAMS PHOTOFACT" is in sale since Wednesday, September 25, 2019. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "acroman" and is located in Runnemede, New Jersey. This item can be shipped to United States.