Guitar Amp Ultrasonic 40 Damping Instrument
Our pricing for this product is the "MAP Pricing." This means that the prices shown here are the "minimum advertised prices" permitted by the manufacturer.
Fits wide and bottle-shaped octals and all tubes approximately 1-1/2" to 1-5/8" diameter (37mm to 44mm), including 0A3, 0C3, 0D3, 1626, 27, 30, 37, "fat-bottle" 5AR4, 5AW4, straight-sided 5R4-types, straight-sided 5U4, 5V3, 5V4, straight-sided 5Y3GB, small-bottle 5Y3GB (Mazda), 5Y4GA, 5Z4P, 6080, "slim" 6550, straight-sided 6AS7, 6C6, 6CA7, 6F8G, 6HB5, bottle-shape 6J5, 6JN6, 6L6GC (Mazda, JJ, GE, Tungsol), 6P3P, 7027, 76, 84, 8417, 85, EL509, straight-sided GZ32, "Fat Bottle" EL34 (Big Bottle), KT90, PL509.*
Guitar amplifiers, especially combo amps, are torture chambers to vacuum tube microphonics. Herbie's Guitar Amp UltraSonic Damping Instruments feature extra-soft, extra-beefy isolation pads for extra vibration control. Guitar Amp UltraSonics eliminate tube rattle, tube whistling, and microphonic oscillation that are sometimes too severe for standard UltraSonics to handle.
These are superb damping instruments also for home audio, delivering pinpoint imaging and detail, outstanding transparency and sense of "air," with highly punctual dynamics.