The Optimal Audio Sub 18 is the flagship subwoofer in the range, featuring an 18-inch driver with 800W power handling and 136 dB peak SPL. Built for large-scale commercial installations, nightclubs, live music venues, and event spaces, it delivers the deep, powerful bass foundation needed when serious low-frequency output is non-negotiable.
Driver
18″
Woofer
Power Handling
800W
Continuous
Peak SPL
136 dB
Peak output
Design
Bass-Reflex
Ported enclosure
Features
✓
18″ driver with 800W continuous power handling — the most powerful sub in the Optimal Audio range
18″ driver with 800W continuous power handling — the most powerful sub in the Optimal Audio range
✓
Bass-reflex design for efficient, deep low-frequency extension
Bass-reflex design for efficient, deep low-frequency extension
✓
136 dB peak SPL for large venues, nightclubs, and live music applications
136 dB peak SPL for large venues, nightclubs, and live music applications
✓
Plywood enclosure for touring-grade durability and low resonance
Plywood enclosure for touring-grade durability and low resonance
✓
M8 threaded inserts for flexible rigging and mounting configurations
M8 threaded inserts for flexible rigging and mounting configurations
✓
Integrates with Optimal Audio SmartAmps and Zone controllers for complete system management
Integrates with Optimal Audio SmartAmps and Zone controllers for complete system management
✓
Black finish as standard
Black finish as standard
Specifications
| Driver | 18″ |
| Type | Passive subwoofer, bass-reflex |
| Power Handling | 800W |
| Peak SPL | 136 dB |
| Enclosure Material | Plywood |
| Mounting | M8 threaded inserts |
| Colour | Black |
| SKU | SUB18 |
