Groove Tubes founder and energy source Aspen Pittman's tireless pursuit of perfect tube tone has resulted in Groove Tubes' reputation for consistency and premium quality. Want proof? Fender tube amps now include Groove Tubes as standard equipment, and true tube aficianados worldwide swear by the tubes and pro audio products Groove Tubes makes. For premium tube tone, choose Groove Tubes!

The 5AR4 (GZ34) rectifier tube is common to higher-powered tube amps such as the later Fender Super Reverb and Vox AC30 (and, of course, Matchless copies). The GT-5AR4 Rectifier tube may be used to replace a 5U4 or 5Y3 and will give a faster response and more dynamic tonal results. This rectifier has a rise time from 300-400 volts that is about one half that of a 5U4, making it great for Mesa Rectifier amps, which use the 5U4. If you want a feel and response that is tighter than the stock rectifiers, yet want to retain the feel and compression character of a vacuum rectifier over the solid state setting, install a GT-5AR4.

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