Description
If your rig runs a tube-rectified amp north of 40 watts, this is the rectifier built to keep up with it. The GT-5AR4-R is Groove Tube’s highest-output rectifier, originally spec’d for the bigger, higher-powered Fender amps of the early tube era — the ones that had to push serious low frequencies without sagging out or choking on transients.
For bass players especially, a rectifier tube is part of the feel of the amp. It shapes how the low end responds when you dig in — whether the amp compresses gracefully, sags with authority, or just stays tight and firm under load. This tube is made for the players who need that higher headroom and don’t want the amp folding when the bottom end gets demanding on stage.
Every Groove Tubes product goes through premium certification for microphonics, hum, noise floor, and physical operation before it ships, so what you drop into your amp is tested and consistent — not a gamble pulled off a random bin.
- High-output rectifier tube design
- Originally used in early higher-powered Fender amps (40 watts or more) with tube rectifiers
- Certified for microphonics, hum, and noise floor
- Limited warranty
A solid pick for maintaining or restoring vintage-style tone in higher-wattage tube amps, and a smart one to keep in the gig bag as a spare — rectifier tubes matter more to your feel than most players give them credit for.
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