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The JBL SRX828SP is a self‑powered (active) dual 18‑inch subwoofer designed for professional live sound, touring, rental, and installation use.
“Dual 18”” means it has two low‑frequency drivers in one enclosure. Because it's powered, it includes its own amplifier and DSP (digital signal processing) inside the unit.
It’s part of JBL’s SRX800 series of professional loudspeakers and subs.
Product Specifications
| System Type | Self powered dual 18”, subwoofer system |
| Maximum SPL (1m) | 141 dB |
| Frequency Range (-10dB) | 29 Hz - 150 Hz |
| Frequency Response (-3 dB) | 35 Hz - 120 Hz |
| Amplifier Design | Class D |
| Power Rating | 2000 W Peak |
| Dimensions (H x W x D) | 681mm x 1205mm x 574mm (26.79in x 47.42in x 22.57in) |
| Net Weight (each) | 65.9 kg (145 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 | 2 x 18 in Differential Drive® |
| System Processing | DSP based, resident in Input Module |
