Professional 450
| Manufacturer | Heco |
| Function | Speaker |
| Produced | 1977-1979 |
| Country | Federal Republic of Germany (West Germany) |
| Model ID | 450 |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Analog Hardware |
| Dimensions | 400 x 250 x 200 mm (15 3/4 x 9 27/32 x 7 7/8 inches) |
| Weight | 8 Kg |
| Frequency Response | 35 - 25000 Hz |
| Power rating (rated / music power) | 50/80 Watts |
| Efficiency | 87 dB / 1 W / 1 m |
| Impedance | 4 ohms |
| Type | 3-way sealed |
| Woofer | 200 mm (7 7/8 inches) |
| Midrange | 1 x 38 mm (1 1/2 inches) |
| Tweeter | 1 x 19 mm (3/4 inch) |