SR18S [Used]

The SR18S 18" powered subwoofer adds serious low end to any full-range PA, running a 1600W Class-D amplifier through a custom high-efficiency 18" transducer built into a rugged wood cabinet with a steel grille. It pairs well with the SRT or SRM series, or with any other full-range loudspeaker, taking the low frequencies off your mains so the rest of the system runs more efficiently and puts out more overall volume. Three custom voicing presets, Flat, Deep, and Punch, let you dial in a natural low end for general use, an emphasized sub-bass for dance and electronic music, or a higher-output setting for bands and rock.

A variable crossover frequency, polarity invert switch, and variable level control from -6dBU to +6dBU make it easy to blend the sub into whatever system you are running, while stereo or mono-summing support lets you deploy it solo or paired with a second unit. A dedicated processing module monitors and protects the amplifier in real time, and the universal power supply with power factor correction keeps performance steady even on unreliable venue power. Frequency response runs from 33Hz to 200Hz with a max SPL of 133 dB, and an integrated pole cup lets you stack a full-range speaker on top.