Hello and Thanks for Looking!Technics SH-305MCThis is a vintage, very hard to find piece of gear.Technics SH-305MC - SUPER amorphous core transformer with double permalloy and 4x copper shields,cast-iron outer case, built like a tank, super musical, only for TOP vinyl connoisseurs.Main Specifications:Model: Amorphous MC step-up transformerTransformer: Amorphous toroidal coreRecommended cartridge impedance: Pass (when using MM cartridge) / Low: 3Ω / Middle: 15Ω / High: 30ΩFrequency characteristics: 3Hz-300kHz / 20Hz-100kHz ± 0.2dBTotal harmonic distortion: 0.001% or less (1kHz)Channel separation: 90dB or more (1kHz)Channel balance: 0.2dB or less (1kHz)Shield model: Permalloy double shield and outer case Cast iron Quadruple shield with copper platingRecommended load Impedance: 47kΩSize: W60 x H90 x D210mmWeight: 10lbs Release date: 1981**Sorry do not have original box or paperwork.**You will be pleased with your purchase!Thank you!