Mullard British Classic Tube
The 10M series by Mullard is a British tube classic, and these are very scarce in the USA. It has a 10,000 hour rated heater life, perfect printing and very closely matched triodes (44/45) when tested. These have the ultra wide bandwidth of the Telefunken, but with just a touch of midrange warmth. The Mullard 10M Master Series is the most sought after and is consistently rated one of the best ECC83/12AX7 tubes of all times.
$195
