Views 5,976 Fosi Audio GR70 is a 229 USD Pure Tube Amplifier for headphones, with adjustable impedance, bass and treble, and it can also work as a preamplifier. Today we will review the GR 70 and see how it fits in the busy market of audiophile products. Introduction Fosi …
Fosi Audio GR70 Tube Headphone Amplifier Preamplifier – Pure Void Lamp Power
























