The Fender Bandmaster was a musical instrument amplifier

Amplifier

Generally, an amplifier or simply amp, is a device for increasing the power of a signal.In popular use, the term usually describes an electronic amplifier, in which the input "signal" is usually a voltage or a current. In audio applications, amplifiers drive the loudspeakers used in PA systems to...

 made by Fender. It was introduced in 1953 and discontinued in 1974.
This page focuses solely on the Bandmaster. See also Bandmaster Reverb

Fender Bandmaster Reverb

The Fender Bandmaster Reverb was an amplifier made by Fender, essentially a Silverface Bandmaster piggyback head with built-in reverb and vibrato. It was introduced in 1968 and was discontinued in 1980. Master volume models with "pull boost" tone circuit and a Mid control knob for the Normal...

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Timeline

Timeline gleaned from

Year	Inputs	Output	Form	Speakers	Controls	Circuit/Model	Price
1953	2 instr, 1 mic		Combo (Wide Panel)	(1) 15" + ext jack	Volume, Treble, Bass	5C7	$229.50
1954	2 instr, 1 mic		Combo (Wide Panel)	(1) 15" + ext jack	Volume, Treble, Bass	5D7
1955	2 instr, 1 mic	26 watts	Combo (Narrow Panel)	(3) 10" + ext jack	Volume, Treble, Bass, Presence	5E7
April 1960	2 channels, each with high & low sensitivity input jacks		Combo (w/Modern Fender style)		each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity master Presence	6G7
End 1960	2 channels, each with high & low sensitivity input jacks				each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity master Presence
Feb 1961- June 1963	2 channels, each with high & low sensitivity input jacks	40 Watts	Piggyback ("head")	(2) 12" + ext. jack Oxford 12M6-10, Jensen C12N	each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity master Presence	6G7-A
July 1963	2 channels, each with high & low sensitivity input jacks	40 watts	Piggyback ("head")	None	each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity Presence removed, "Bright" added	AB763
1968	2 channels, each with high & low sensitivity input jacks		Piggyback ("head")	None	each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity Bright	AA568
1969	2 channels, each with high & low sensitivity input jacks		Piggyback ("head")	None	each channel: Volume, Treble, Bass Vibrato channel also: Speed, Intensity Bright	AA1069
1974	Discontinued	.	.	.	.	.

Cosmetics

• Tweed
• Blonde
• Blackface
• Silverface 1967 - 1974
  • Drip Edge 1967 - 1968
  • Black Line 1967 -

6G7-A

The 6G7-A circuit was used in several Fender amplifiers, including the Bandmaster. It produces 40 watts into 4 ohms. The circuit was used from 1961 until July of 1963 when the "AA763" circuit was introduced. "Blonde" aficionados feel this circuit has superior tonal characteristics when overdriven, to the AB763 circuit. The 6G7-A circuit also included a vibrato that is heralded as Fender's best by many enthusiasts.

AB763

The AB763 (designed in July, 1963) circuit is arguably considered the "best" circuit version produced for this amp by collectors and aficionados. Amps retrofitted to this circuitry are described as having been "blackfaced," a reference to the black faceplate used on these amps during much of this era.

AA568

The AA568 version (introduced May, 1968) was met with popular dislike by Fender's customers. It is referred to at times as the "silverface" circuit, referring to the brushed aluminum control plate used from 1968 to 1974. The circuit change and the cosmetic change didn't happen at the same time; some 1967 and early 1968 Bandmasters still possessed the AB763 circuitry.

Unfortunately, the tube chart inside the amp head cannot be reliably used to differentiate the AB763 from the later circuits, as Fender continued using the older tube charts for a while after changing the circuit configuration.

AA1069

Some of the changes from the AA568 were reverted in October, 1969, yielding the AA1069 circuit, but many of the changes remained in place.

See also

• Bandmaster Reverb
  Fender Bandmaster Reverb
  The Fender Bandmaster Reverb was an amplifier made by Fender, essentially a Silverface Bandmaster piggyback head with built-in reverb and vibrato. It was introduced in 1968 and was discontinued in 1980. Master volume models with "pull boost" tone circuit and a Mid control knob for the Normal...
  
  
• Fender