Fender Silverface Musicmaster Bass
Model/Circuit Number:
Years of Production: 1970 – 1982
Era: Silverface
Configuration: Combo
Controls: Silver, forward facing w/ blue labels
Knobs: 1-10 Skirted Knobs
Schematics
Faceplate
- Front: In, In, Vol/Power Sw., Tone – Pilot Lamp
- Rear:
Cabinet
- Dimensions: 20 3/4” x 17” x 9 1/2”
- Hardware: Medium Chassis Straps 4 5/8″
- Handle: Black Strap Handle
- Feet: Glides
- Corners: Corner Protectors
Covering Material
- Tolex/Tweed: Black Tolex
- Grill Cloth: Blue Sparkle Grill Cloth
Logo: Grille mounted, raised, chrome & black script
Weight: 24 lbs.
Speaker
- Size: 1 x 12
- Impedance: 8 ohms
- Model: Oxford 126PJ4 or CTS 12(For more info, check out the Jensen Replacement Speakers)
Effects:
~Watts: 12 watts
Tubes
- Pre amp: 12AX7
- Power: 2 x 6AQ5 (7 pin minature pentode) or 2 x 6V6
Bias: Cathode Biased
Rectifier: Solid State
Comments: Fender switched back to the blackface era cosmetics some time in 1980. Musicmaster Bass amps produced between late 1980 and 1982 have a black control panel and silver sparkle grille cloth.
This amplifier is only a 12 watt unit .
In 1978 , they were using a 70uf on the filter cap going to the power tubes pin #4
Thanks will get this update asap.
Bryson Faggart
mojotone.com
This amplifier is only a 12 watt unit . In 1978 , they were using a 70uf on the filter cap going to the power tubes pin #4
This amplifier is only a 12 watt unit . In 1978 , they were using a 70uf on the filter cap going to the power tubes pin #4
can you tell what year my amp is by the numbers on the power transformer? Fender Music Master Bass amp: Power Trans.1286207
339-606A13
72Basc
Stamped Chassis #: F073406
Thanks
Dolph
They are 12 watts not 26 but change the power transformer to a 300 watt one from a 250 watt one and put in a better out put transformer and change the input circuit and add a Eminence High DB speaker of your choice and these amps honk
Since I changed out the transformers and did a cap job and put in the High DB eminence Tonker Speaker this amp is giggable. I played in a loud 4 piece band and i and the band could hear my amp on stage just fine.AND it was hardly turned on volume wise. I would guess it is easily putting out at least 22 watts if not a bit more.
One notable thing about this amp….the PI was actually an audio transformer rather than a tube inverter. Something you don’t see every day….
This was my first amp. Because it was only 12 Watts, you could max out the volume and get a nice overdrive without it being really loud. Sadly, I loaned it to a friend, and his sister’s boyfriend swiped it. There’s one on ebay now listed for $595.
I have a this same Music Master Bass amp Serial #A815433 It was owned by Mary Kaye of The Mary Kaye Strat fame. Does anyone know what it’s worth?
ABout a million.
Cool little amp for recording guitar. Gets a nice distortion at a reasonable volume. I’ve seen quite a few recently on Reverb and eBay, selling south of $500.
My 1979 Musicmaster Bass Amp Honks for harmonica. Went to JJ 6V6’s, and a speaker change to an.eminece coded Fender Ceramic Speaker. Thats all.
Earlier units had different knobs. Mine does and it’s from ’74.
This is a great guitar amp.