This is the same as a Model 51C, but the absence of the C designation indicates it was produced after 1960.
See the Model 51C page for details.
| Amplifier Type | 2 Channel Vacuum Tube |
| Output Power | See Text |
| Drum | 1 - 15" Speaker |
| Horn | 1 - Compression Driver |
| Speeds | 1 Speed (Stop/Tremolo) |
| Interface | 6 Pin 2 Channel |