- Front: Fuse, Power Sw, Pilot Lamp, Tone, Vol, Mic Vol, In, In, Mic In, Mic In
Logo: Cabinet mounted, block letter
- Size: 2 x 10
- Model: Jensen P10R(For more info, check out the Jensen Replacement Speakers)
- Pre amp: 5A4: 2 x 6SJ7 ; 5B4: 2 x 6SC7 ; 5C4: 2 x 12AY7
- Power: 5A4: 2 x 6L6 (metal envelope) ; 5B4, 5C4: 2 x 6L6G
Bias: Cathode Biased
Comments: A speaker and ex. speaker jack were added under the chassis (5C4?). The cabinet size changed several times during this period. A fourth input was added as of model 5B4.