| Model ID | Jack of Jack |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 60.5 × 76.5 × 43.5 cm (W × H × D) |
| Weight | 48kg |
| Frequency Response | 30Hz-22kHz |
| Treble | Horn |
| Midrange/Bass | Paper Cone |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 800Hz |
| Power Handling (Nominal) | 25W |
| Power Handling (Peak) | 50W |
| Enclosure Type | Bass Reflex |
| Finish | Gray |
| MSRP (1971) | ¥69,000 |