Custom-wound MANLEY input and output transformers with nickel laminations in mu-metal cases for that big MANLEY sound! * Vacuum tubes are hand-selected for low noise and excellent reliability * Unit is hand-wired with silver solder and audiophile-grade componentry * Stereo LINK swich, plus high-pass side-chain filter switchable to 100Hz or 200Hz * GAIN and REDUCTION controls make getting a great sound quick and easy