The Yamaha ST15 is a matching transformer designed for the parallel connection of low impedance speakers to high impedance type distribution power amplifiers. It features a capacity of 15W and is compatible with line voltages of 100V or 70.7V. The device includes multiple secondary cords corresponding to speaker nominal impedances of 8, 6, 4, and 2 ohms.
| Capacity | 15W |
|---|---|
| Dimensions | 80 x 48 x 46mm |
The dimensions are 80 x 48 x 46mm, which is approximately 3-1/8" x 1-7/8" x 1-13/16".