The JRX218S is driven by a massive JBL 18" woofer with a cast frame and 3" voice-coil.
| Power Rating | 350 W / 1400 W | |
| Frequency Range (-10 dB) | 34 Hz - 250 Hz | |
| Frequency Response (±3 dB) | 53 Hz - 250 Hz | |
| Sensitivity (@1m) | 98 dB SPL | |
| Nominal Impedence | 4 ohms | |
| Recommended Amplifier Power | 350 W to 700 W into 4 ohms | |
| Maximum SPL | 133 dB | |
| Dimensions (H x W x D) |
605 mm x 508 mm x 551 mm (23.5 in x 20.3 in x 22 in) |
|
| Net Weight | 32.2 kg (71 lb) | |
| Low Frequency Driver | M118-4 | |
| Input Connectors | Neutrik® Speakon® NL-4 (x2); parallel |
Amplifier
| Sensitivity | 1.4Vrms |
| Frequency Response | +0dB, -1dB |
| Signal to Noise | >103dB (at .775Vrms, 6dB lower) |
| Intermodulation Distortion | < 0.3% |
| Damping Factor | > 200 |
| THD | < 0.5% |
| Crosstalk | At 1kHz: > 85dB, At 20kHz: > 55dB |
| Dimensions | 19" (48.3 cm) x 3.5" (8.9 cm) x 10.7" (21.2 cm) |
| Weight | 10.8 lbs (4.9 kgs) |















