Graham Slee Solo headphone amp and with Graham Slee PSU1 Power Supply. Includes Nordost Black Knight input cables. High end hifi headphone amp with dedicated power supply. The item "Graham Slee Solo headphone amp & PSU1 Power Supply" is in sale since Saturday, October 2, 2021.This item is in the category "Sound & Vision\Home Audio & HiFi Separates\Amplifiers & Pre-Amps". The seller is "jonama-1620" and is located in Thirsk. This item can be shipped to United Kingdom.