This is a set of factory matched tubes from Tube Amp Doctor, specifically the TAD EL34-STR EL34 6CA7 with red bases. These tubes are ideal for use in power amplifiers. The tubes are new in an open box and are ready for use.

The TAD EL34-STR EL34 6CA7 have the red base. These tubes are suitable for vintage electronics and are perfect for anyone looking to upgrade their tube amplifier. The tubes are brand new and have been factory matched for the best performance.

These tubes were acquired from eBay lot sale. Advertised as new with an open box. I’m only selling these because my amp requires a matched quad.