JM-3 (Rev. 2)
| Brand | McCune Sound |
| Designer | John Meyer, Bob Cavin |
| Function | Speaker (Active) |
| Produced | 1979 |
| Form Factor | Floorstanding / Stand Mounted |
| Signal Path | Analog Hardware |
| Dimensions | 66 × 109.2 × 81.3 cm (W × H × D) |
| Weight | 245lbs |
| Frequency Response | 60Hz-14kHz |
| Treble | ?? (Electro-Voice) |
| Midrange | Horn (McCune, Compression Driver: Altec) |
| Bass | 15" Paper Cone (Altec) |
| Continuous Power Input | 925W |
| Crossover Frequencies | 400Hz, 4kHz |
| Dispersion (Horizontal) | 90° |
| SPL (1m) | 135dB |