1 NOS Matsu/Mullard 5AR4 GZ34 Vintage Rectifier Preamp AudioTube FreePost

Also be sure to check out our official site! New part numbers added daily including true nos sealed box rarities. Old stock vintage production matsu national 5ar4 6z34 preamp audio rectifier tube. The british supplied expertise and tooling via'transfer of technology' resulted in several critical audiophile advantages. Same anodes, micas, electrode geometry, glass envelope, spot welding, grid wire spacing and cathode processing chemistry! Revered for their sound reproduction, these direct japan imports are carefully curated top echelon warm vintage. Sonic review: "great balance across the whole range, simply wonderful rich full sound". Full amplification tested + useful life test pass! No meter movement at all, several singles available. Our unique gm output test applies 225 vdc simulating actual circuit operations w/ filtered dc + leak short gas. Authentic vintage hifidelity audio curation by caliacoustics.