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| Vintage Amps Classic guitar amps from the 50's, 60's and 70's are, in many guitar player's opinions, superior in sound to todays more modern amplifiers. Most of the better known brands are also extremely reliable when properly maintained. The most significant problem encountered in older vintage amplifiers is capacitor failure, which results in noise, distortion, reduced power output and generally degraded performance. The best solution is to replace all the capacitors which tend to fail or cause poor sound quality. This procedure involves replacing all capacitors in the amplifier and power supply sections that effect sound quality and reliability. As an example, a Fender Twin Reverb has 31 capacitors that should be replaced for optimum sound and reliability. Ceramic type capacitors (which tend to last indefinitely) not found in the sound path need not be replaced under normal circumstances. The result of this repair can be dramatic. The overall sound has better definition and is more dynamically responsive. Very significant sound improvements can be realized by
using high quality Xicon polypropylene capacitors. Of all the different
capacitor brands tested, Xicon polyproplyene capacitors provided the best
sound at resonable cost. Their great sound is due, in part to the solid
copper lead wire construction. Compete capacitor replacement with Xicon polypropylene capacitors and high quality electrolytic capacitors typically costs from $150.00 to $250.00 including both parts and labor. Illustrated below is a capacitor and filter replacement for a 1970 Fender Pro Reverb. To enlarge Capacitor pictures, click on image.
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