Martin Audio Blackline X118 18" Passive Subwoofer

The Blackline X118 is a single-18 portable subwoofer that anchors the low end of a Blackline X system. Its 18" (460mm) long-excursion driver on a 4" voice coil sits in a reflex plywood enclosure tuned for punchy, extended bass, making it the go-to sub when a 15 is not enough for the room.

It handles 800W AES (3200W peak) at 8 ohms and reaches 136dB peak (half space), with response down to 36Hz (-10dB). Three NL4 connectors handle through-wiring across a stack, and the cabinet accepts castors and flying hardware for both ground-stacked and suspended use.