Up for sale is a matched pair (2 Pcs) of vintage NOS Mullard ECC88 dual triode vacuum tubes, manufactured in Great Britain. Featuring desirable black plates and early solid disc getters, legendary British Mullard tubes are sought after for their lush, warm soundstage, highly detailed midrange, and musical naturalness. Supplied in new white boxes, this pair serves as a premium sonic upgrade for high-end audio preamplifiers, DAC buffer stages, and headphone amplifiers requiring 6DJ8 / ECC88 / 6922 / E88CC tubes.

Both tubes have been thoroughly tested on an advanced digital Amplitrex AT1000 tube tester. Complete laboratory measurements for Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to specified reference specs (15.0 mA / 12500 µmhos) are presented in the table below.