Fender Prosonic Combo Amplifier USA 1998 to 1999 Custom Shop Dual Celestion SpeaskersFENDER PROSONIC Guitar Amplifier A highly regarded and increasingly sought after tube amp, this Fender Prosonic Amplifier was designed by Bruce Zinky and hand built in Fenders Corona Custom Shop during the late 1990s. The Prosonic stands out as one of Fenders most versatile amplifiers of the era, capable of delivering everything from classic Fender clean tones through to rich, saturated overdrive, all in a single unit. Tone and Performance: This is a