James Loudspeaker ST21-4 underground subwoofer
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The James Loudspeaker ST21-4 is a 21 inch underground subwoofer for outdoor applications. This subwoofer is partially buried in the ground. 21″ subwoofer, 1000 W, 4 ohms, 18-120Hz +/-3dB, 91dB 1W/1m, 100kg
James Loudspeaker ST21-4 outdoor underground subwoofer
The James Loudspeaker ST21-4 is a 21 inch underground subwoofer for outdoor applications. This subwoofer is partially buried in the ground. It features a powerful 21 inch transducer for maximum excursion and sound pressure. Due to the high load capacity of the JA ST21-4, a 70V version is not offered. This subwoofer can be driven directly by an M1000 subwoofer amplifier, which produces an output of 70 volts or 1000 watts at a power rating of 4 ohms.
We recommend the RS1000 as the power amplifier for this subwoofer.
Additional information
| Manufacturer | James |
|---|---|
| Type of use | Outdoor speakers, subwoofer |
| Operating performance | 1000 watts |
| Frequency response | 18Hz-120Hz ±3dB |
| Efficiency | 91dB 2.83V/1m |
| impedance | 4 ohms nominal |
| Width | 610mm |
| Height | 610mm |
| depth | 610mm |