I am selling a really nice and very versatile custom-made Japanese Tube amplifier that can run either 45/2A3 (2.5V Tubes) or 6A3/VT-52 (6.3V Tubes). This is a Push Pull Tube Amplfier built with all the ultra high-end parts and upgrades already done and modified to run with 120V U.S AC voltage. It was originally made to run on 100VAC but with some minor modifications, it is converted to run with U.S 120V AC. This amplifier was built in Japan by a small Japanese amplifier shop and Ive imported to the U.S for my own use. Almost all the parts in this amp are either made in Japan or the U.S.A and there is very little to no Chinese parts that I am aware of. All the caps, resistors, sockets, binding posts; etc. are all high quality Japan parts or the U.S.A vintage parts! This amp sounds incredible with 45 / 2A3 and VT-52 tubes Ive tried. I spent so much time and money replacing and upgrading all the audio coupling capacitors and the almost all the electrolytic capacitors in this amplifier to sound the best it can and for the entire life span of this amp! This amp uses Auto Biasing / Cathode Biasing for the output tubes so there is no need to adjust bias. There is a filament hum pot to adjust hum if there is any but I never noticed hum or any noise issues with my 100dB+ sensitivity speakers! This is a plug and play amp that it will rival many other 45/2A3 tube amps that cost 2x or 3x more than my asking price! Only reason I am selling is that I no longer have the time to enjoy the audio much in the future. I will not include the output tubes (45/2A3/6A3/VT-52) at my asking price but it comes with all the other input signal tubes (pair of 6J5, pair of 6N7, one 5T4). I have some good strong 45 output tubes that I might sell separately. There is a switch to select the output tube filament voltage between 2.5V (for 45/2A3 tubes) or 6.3V (for the 6A3/VT-52 tubes) internally. That switch is easily accessible from the bottom side of the amp and clearly labeled. You should never use the 2.5V tubes at 6.3V setting or vice versa. So, please be careful if you try to change output tubes from 45/2A3 to 6A3/VT-52 tubes for the correct filament voltage setting. The info below with the asterisk * added behind the line is the improvement or an addiction that is performed to this amplifier myself. Tango ME-275 Power Transformer with Magnetic Shield (Japan 100V version but converted for 120V US Voltage) Tamura A-396 5H-200mA Choke Transformer Tamura F-485 Output Transformers (8K Primary Impedance to 16 / 8 / 4 ohms speaker output impedance) Replaced all electrolytic capacitors with best quality Nichicon or Panasonic Capacitors * Added bypass film capacitors for the power supply reservior capacitor * Replaced all the coupling capacitor with the highest quality Audyn Copper Cap and Sonicap Platinum Caps * TKD Volume pot for both L&R channels * Replaced internal Wiring with Higher Grade OFC and OCC cables for the signal lines and the output lines * Added Speaker Impedance Selector Switch to use with all types of speakers (8ohm, 4ohm, and 16ohm) * No Output Tubes (i.e. 45/2A3/6A3/VT-52) are not included in the sale but I have some 45 tubes available for sale separately! Includes a used but near new pair of U.S made 6N7, near new pair of U.S made 6J5, and single Haltron 5T4 rectifier tubes