APL-9
| Brand | APL |
| Manufacturer | Applied Physics Laboratory, Inc. |
| Function | Speaker |
| Produced | 1973 |
| Country | United States |
| Form Factor | Floorstanding / Stand Mounted |
| Signal Path | Passive Hardware |
| Driver | 5.25" Paper Cone (x9) |
| Power Handling | 110W |
| Enclosure Finish | Walnut, Slate (Pentagonal) |