T18 — the flyable single-18 subwoofer in the Trinity Series. 140.4 dB peak SPL, 25-100 Hz, single 18-inch bass reflex design.

T18 is the compact subwoofer offering in the Trinity Series, the industry's first series of robotically controlled line source systems. This high-output, low-profile enclosure offers outstanding low-frequency performance with peak SPLs of 140.4 dB and an operating range of 25-100 Hz.
Sharing many internal components with PK Sound's flagship T218 subwoofer, T18 features a front-loaded, long-excursion 18″ transducer in a bass reflex design for clean and punchy output. A large, unrestricted vent enables high SPL performance with minimal port distortion. A single field-replaceable module located on the rear of the cabinet contains the 2,700 W Class D amplifier, control electronics, and power supply.
Integrated rigging hardware allows for up to 16 T18 modules to be flown in a column, or securely ground-stacked. An M20 pole mount thread is also located atop the unit. A low-profile design allows T18 to fit under any stage and efficiently pack for global transport, making it an ideal solution for both mobile and installed applications.
| Peak SPL | 140.4 dB |
| Frequency Response | 25-100 Hz |
| Low Frequency | 1 × 18″ Bass Reflex |
| Amplifier | VE40 Class D |
| Amplifier Power | 2,700 W |
| Operating Voltage | Auto-Switching 100-240 V, 50/60 Hz |
| Power Consumption | 600 W |
| Network | AES70 / Proprietary |
| Input Selection | Analog/AES — IP65 |
| Audio/Network | Balanced XLR/etherCON — IP65 |
| Power | powerCON TRUE1 — IP65 |
| Weight | 70.2 kg / 154.7 lb |
| W × H × D (mm) | 755 × 507 × 780 |
| W × H × D (in) | 29.7 × 20 × 30.7 |
| Max Line Length | 16 Modules |
| Environmental | IP54 |
| Module Construction | Void-Free, High-Grade Baltic Birch |
| Rigging Construction | 6061-T6 Aluminum — 4 × Pin Links, M20 Pole Mount |
| External Coating | EXL Polyurea |
| Grill | Powder Coated Aluminum |
| Warranty | 7 years · all components |