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Groove Tube 12AX7 Russian Amp Vacuum Tube

• Brighter, Lower Gain
• Quicker Compression
• Not Well Suited for High Gain Amps

New tube from Russia. Slightly brighter and lower gain, quicker compression than GT 12AX7. Great for most Fenders, may not be well suited for high gain Fender type amps (such as Boogie).The Groove Tubes WarrantyPreamp tubes:Warrented to be free of burn out, excessive noise or microphonics for 180 day from date of purchase.Power tubes:Warranted to be free of burn out for 90 days from date of purchase. If one tube fails, the whole set will be replaced to insure proper matching.GT-Solid Rectifiers & Substi-tubes:Warranted for 3 years from date of purchase.The Groove Tubes Process - Step by Step Testing and Selecting Tubes.Groove Tubes literally goes through thousands of tubes, rejecting more tubes than they accept. They put every tube through a rigorous performance test, one at a time, in real amp circuits. The preamp tubes are rejected for adverse microphonics, low output or high noise. Power tubes are more involved, and they go through additional testing. Here's what they're looking for:Grid Leakage. Causes tube to burn out quickly, and worse yet, to short out and wreak lots of havoc. They throw these tubes out.Weak Vacuum. Tube will act deceptively normal, then just burn out on you (usually at the worst time!). These tubes don't make it past the first round.Gain to Distortion Ratio. The center of all Groove Tube magic! This measurement tells us if the tube will distort early or later in its power range. Since the tube distortion is rich in harmonics (That's why we love 'em!), the tonality of each tube will vary according to this ratio. Only Groove Tubes sets have been measured and matched to insure longer sustain, wider frequency response and a more musical amplifier!Rating and Matching Tubes.Groove Tubes translates this gain to distortion ratio into a pe









List Price: $ 24.00



Price: $ 17.95














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