Probably one of the most underestimated tubes for high fidelity, The 804 has some amazing characteristics thanks to the relatively low mutual conductance. It provides the designer with the perfect phase splitter/buffer amplifier because both of the triodes are perfectly matched and have identical characteristics in every way. Further to this, You will find a shield between the two anodes reducing crosstalk to a bare minimum.  Providing this shield is negatively grounded it will out perform many tubes in the same gm range by far.

Our ECC804 is made right here in the U.K. and features a soft sintered anode design that we believe is second to none. We therefore recommend highly the Brimar thermionic products ECC804… we sincerely hope you agree!