1970-1975 400 PS Bass

Year:

 1970-1975

Model:

 400 PS Bass

Circuit:

 ?

Config:

 Piggy-back

Control Panel:

 Black forward facing w/ white labels

Front Conrol Layout:

 Power Sw, Standby Sw, Pilot Lamp - Bass: In, In, Deep Sw, Vol, Treb, Bass - Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass, Reverb, Speed, Intensity - Master Volume

Rear Conrol Layout:

 Speaker Out, Speaker Out, Speaker Out, Output Tubes Matching, Tremolo Sw Jack, Reverb Sw Jack, Fuse, Ground Sw

Knobs:

 Chrome skirted w/ black "F" center, numbered 1 - 10

Head:

 11½" x 28" x 12¾" (29.2 x 71.1 x 32.4 cm)

Head Hardware:

 Black strap handle, corner protectors

Cabinet:

 48" x 24" x 24" (121.9 x 61 x 61 cm)

Cab Hardware:

 corner protectors, casters

Head/Cab Covering:

 Black Tolex

Head/Cab Grille:

 Blue grille cloth (70-72) or black acoustic foam w/ white trim (72-75)

Logo:

 Grille mounted, raised, chrome & black script "Fender" w/ tail (head and cab)

Weight:

 Head: 84 lbs. (38.1 Kg)
Cab: 126 lbs. (57.2 Kg)

Speakers/Load:

 1 x 18"/4 ohms

Speaker Model:

 ?

Effects:

 Tremolo, Reverb

Output:

 435 Watts (3 x 145 Watts)

Preamp:

 2 x 7025

Power:

 6 x 6550

Bias:

 Fixed Bias

Rectifier:

 Solid State

Phase Inverter:

 12AX7, 6L6GC, Transformer

Other:

 Reverb Driver: 12AT7
Reverb Recovery: 7025
Tremolo: 12AX7 (photoresistor)

Comments:
  • The output was divided into three 145 Watt outputs, so three cabs were needed to get the entire 435 Watts.
  • Fender included a wheeled stand for the head at no extra charge.