The Fender Musicmaster Bass Amp is an often overlooked gem from Fender’s 1970s lineup. Originally designed as part of a student package alongside the Musicmaster Bass guitar, this compact combo amp has found a second life among guitarists seeking unique vintage tones.
 
While it was marketed for bass players, guitarists quickly discovered its warm, gritty breakup and rich midrange. Its design is reminiscent of the Silverface Fender Champ, but with several notable upgrades. Most importantly, the Musicmaster Bass Amp features a 12-inch speaker—larger than the 8-inch speaker found in the Champ. This gives it fuller bass response and a rounder tone overall, making it more versatile across instruments. Additionally, it pushes 12 watts of tube power—double the output of a Champ—making it powerful enough for small gigs, recording sessions, and practice.
 
Fender produced the Musicmaster Bass Amp from 1970 to 1980 in a Silverface version, and from 1980 to 1983 with a Blackface aesthetic. 
The earliest models, known as the CFA7010 version, were equipped with a 6AQ5 tube circuit, which was later replaced by the more common 6V6 circuit beginning in mid-1973.
 
This particular unit is a rare early example from late 1970 or early 1971, with a low serial number: 00598 out of approximately 15,000 units produced. It features several distinguishing characteristics specific to the first production year, including:
 
The original “MUSICMASTER BASS AMP” front panel logo (the word “AMP” was dropped in early 1971).
Protective metal corners on the bottom of the cabinet, unique to the earliest models.
CFA7010 circuit using 6AQ5A tubes.
Flat pilot light lens.
Classic Fender “F” style control knobs.
No dedicated on/off switch—power is controlled via the volume knob.
 
Specs:
Circuit: 6AQ5A version
Output: 12 watts
Transformers: Original Schumacher units dated 1970/71 (606038, 606037, 606114)
Speaker: 12-inch replacement speaker from the 1970s
Voltage: 110V (included step-down 220v external transformer)
Serial Number: 00598
 
 
Praised by guitarists like Noel Gallagher (Oasis) and Dan Auerbach (The Black Keys), the Musicmaster Bass Amp remains a cult favorite for its simplicity, character, and distinctive tone.