Mullards are now made in the Reflektor factory in Russia, which is owned and operated by the New Sensor Corp. New York.  These tubes have well balanced triode pairs and a very even flat response. Microphonics are not an issue despite the larger than average plate structure and transconductance tests measure the same as NOS samples. These are not ultra-high gain tubes and carry a very good noise floor with exceptionally smooth tone. The Mullards add virtually no tone coloring and are smoother sounding than a JJ ECC83S.