Tube Amp Doctor 5AR4 Rectifier, Premium Selected
A faithfull reproduction of the Mullard/VALVO GZ34.
Pure power and the typical sag have been the distinguishing characteristics of the most popular guitar amps of guitar heroes since the 1960s.
Upgrade for 5U4GB and 5U4G.
Q: When does a tube become a Premium Selected tube?
A: All tubes labeled Premium Selected have passed the following tests:
– Plate Current (PC) and Amplification (TC)
– Low Noise Test
– Microphonic Test
– Sonic Tests
– Shock Tests
– Listening Tests
– Shorts & Leakage Tests