Perke-style FET Differential Headphone Amplifier This is a headphone amplifier designed by Perke, who has guided many people to the enjoyment of vacuum tube amplifiers and headphone amplifiers like this one. For more details, see http://www.op316.com/tubes/hpa/index.htm Upon listening, I nodded in agreement with the straightforward sound and transparency. It is configured with a linear power supply using a power transformer, not a switching power supply. The front panel has two PH outputs (6.35mm) and one 3.5mm input. The red and black wires on the back panel are 12V outputs for other devices. There are some minor scratches due to use. As this is an old item, it is sold as-is, with no claims and no returns. #Sound Old Man Audio Shop ◀️ Entrance is here 【Please Note】 ● The title may contain search keywords. ● To prevent trouble, we will not respond to price negotiations. ● The shipping method may be changed without notice. The following are search tags: #Cartridge #MM Cartridge #MC Cartridge #Record Needle #Analog Record #Record Cartridge #DJ #Turntable #Record Player #Analog Player #Club Music #DJ Mixer #Phono Motor #Phono Equalizer #Head Shell #Tone Arm Management Number