This is our ECC803S V1 Option Retube Kit for the Carr Mercury. It contains a Long Plate ECC803S for V1, an ECC81 for V2 and an ECC83S for V3. The ECC803S Long Plate tubes have cool vintage vibe with a great high end sparkle and big warm mids!

The power tube is a premium tested JJ Electronic KT88. The JJ KT88's are simply huge sounding with a deep low end, massive mids and sweet smooth highs. This tube will provide maximum headroom.

Unlike other tube venders who charge for low noise tubes, all our tubes meet rigorous tests for low noise, microphonics and nine additional tests.

The video below shows both our preamp tube testing and power tube matching procedures here at Eurotubes which are second to none. We may not be the cheapest, but we are arguably the best.

Doing what other tube resellers say "can't be done" since 1998

Shipped and insured by Priority mail which is a 2 to 3 day delivery!