Get your TAD Tube Amp Doctor EZ81/6CA4, Premium Selected tubes at Humbucker Music! As one of the largest dealers of high-end amplifiers in the world, we know and understand tubes (and the amps they go in). TAD tubes are carefully selected and undergo very strict quality control before being offered for sale. If they don't past this rigorous testing, they are not chosed to be TAD tubes. We highly endorse TAD replacement tubes for any high-end or boutique amplifier! Description: The TAD EZ81 / 6CA4 is a small rectifier tube for 6.3V filaments. It is used in smaller amps, such as the Marshall 1974X or the TAD 18W Plexi Kit, Silvertone amps and in various Hammond organ amplifiers. It is a true full power EZ81. Also used in many audio amps and in old tube radios. Q: When does a preamp tube become a Premium Selected tube? A: All preamp tubes labeled Premium Selected have passed the following tests: - Low Noise Test - Microphonic Test - Gain Test - Sonic Tests - Shock Tests - Listening Tests - Balanced Output Test Matching and Selecting Options for Preamp Tubes Matching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems. This matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems. TAD Premium Selected/Highgrade tubes are guaranteed for a period of 6 months (according to terms of warranties) for the quality criteria mentioned above.
