Many tube amplifiers will have a tube chart within the amp itself.This may also be helpful when dating a vintage tube guitar amplifier.There is a wide range of sizes and power ratings for guitar amplifiers, from small, lightweight "practice amplifiers" with a single 8" speaker to heavy combo amps with four 10" speakers and a powerful amplifier, which are loud enough to use in a nightclub or bar performance.Guitar amplifiers can also modify the instrument's tone by emphasizing or de-emphasizing certain frequencies, using equalizer controls, which function the same way as the bass and treble knobs on a home hi-fi stereo, and by adding electronic effects; distortion (also called "overdrive") and reverb are commonly available as built-in features.Dating early Fender amplifiers is sometimes quite challenging.While dating Fender amps made before 1994 by serial number is all but impossible (as records of these numbers were never kept), all hope is not lost—the charts below should prove helpful in dating your Fender amp.Some guitar players are longtime users of a specific amp brand or model.Many electric guitar players use external effects pedals to alter the sound of their tone before the signal reaches the guitar amp, such as the wah wah pedal and the chorus pedal. For information on amps for bass guitar, a lower-pitched, similar instrument, see the article on bass amps.
On early amps, this material was varnished to make it a more durable covering.
Although the dates derived using the charts below will likely be a good approximation, they should not be considered exact.
All Fender amplifiers manufactured from 1990 to the present include a date code, printed on the quality assurance (QA) sticker on the back of the amp chassis.
Guitar amplifier dating by serial numbers - How To Date A Guitar Amp or Bass Amp By Serial Number.
There are a number of resources available online to help you to date your guitar amplifier or bass amp.