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The JBL SRX818SP is a self‑powered (active) 18″ subwoofer in JBL’s SRX800 series.
Because it is self‑powered, it includes its own built‑in amplifier and DSP (digital signal processing), so you don’t need a separate amplifier to drive it.
It is intended for professional live sound, tour, DJ, rental, and installation applications — essentially wherever strong, deep low-frequency reinforcement is needed in a flexible and robust format.
Product Specifications
| System Type | Self powered 18”, subwoofer system |
| Maximum SPL (1m) | 135 dB |
| Frequency Range (-10dB) | 29 Hz - 150 Hz |
| Frequency Response (-3 dB) | 35 Hz - 120 Hz |
| Amplifier Design | Class D |
| Power Rating | 1000 W Peak |
| Dimensions (H x W x D) | 683mm x 684mm x 575mm (26.89in x 26.92in x 22.62in) |
| Net Weight (each) | 39.5 kg (87 lb) |
| EQ | 20 parametric EQ's, speaker delay, and 50 available slots for presets |
| Inputs | Neutrik ¼ - XLR input; Neutrik XLR Output |
| Outputs | 2 x XLR |
| Enclosure | 18 mm Duraflex coated plywood |
| LF Driver | 1 x 18 in Differential Drive® |
| System Processing | DSP based, resident in Input Module |
