• Two 18 inch Pro Rider(r) Black Widow(r) woofers with Kevlar(r) carbon fiber cones and field-replaceable baskets, flat-wound 4 inch voice coils, and cast-frame baskets
• Frequency response: 51 Hz - 300 Hz
• 10 dB point: 36 Hz
• Sensitivity: 99 dB (1W/1m)
• Power handling: 4800 watts peak
• 4 ohms
• Hammertex durable covering material
• New grille
• Weight: 148.50 lb
• Width Packed: 23.25"
• Height Packed: 51"
• Depth Packed: 32.75"

The SP 218 is a subwoofer designed enhance the low-end tin SP Series or other full-range speaker systems. Other uses include bass guitar, keyboard and drum monitoring.

The enclosure is constructed of aspen hardwood plywood with internal bracing covered in a heavy- duty, textured Hammertex™ covering.

A powder-coated, perforated steel grille covers the front of the enclosure. Recessed steel handles on either side provide portability. A pole guide for support of a pole- mounted, high-pass enclosure is provided on one side of the SP 218. Rubber feet are provided on the opposite side for horizontal use. Rubber feet and corner casters on the bottom and a corner handle on top make moving the enclosure an easy, one-person operation.

Inputs are at the rear of the enclosure and consist of two 1/4" jacks, one four-pin Neutrik® Speakon® non-switching jack and one Neutrik Speakon switching jack. The enclosure input is configurable, with the default being 4 ohms with both drivers in parallel when using the parallel inputs. A dual-woofer 2 x 8 ohm configuration is available through the switching Neutrik jack, which disconnects the 4 ohm inputs and provides separate inputs to the woofers when used. This ingenious input design provides maximum flexibility for single- or dual-amplifier operation, without having to manually rewire the enclosure.

This low frequency enclosure is comprised of two 18" Pro Rider® subwoofer drivers in a vented alignment. The Pro Rider driver delivers superior performance due to its advanced cooling system, large 4" voice coil with edge- wound aluminum wire and Kevlar® composite cone. This design provides strong bass extension and high power handling to complement a full- range sound system.