The SP118 is a subwoofer designed to make it easy to add more low end to the SP Series or other full-range speaker systems. Other uses include bass guitar, keyboard, and drum monitoring.
The enclosure is constructed of top-quality birch plywood and internal braces, covered with heavy-duty black carpet and reinforced with powder-coated steel corners.
A powder coated, perforated steel grille covers the front of the enclosure. Recessed steel handles on either side provide portability. A pole guide for the support of a pole-mounted, high-pass enclosure is provided on the top face of the SP118. Rubber feet are provided on one 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 in. jacks and one 4-pin Neutrik Speakon jack. All inputs are parallel, with the +1 and -1 pins of the Neutrik jack connected to the Pro Rider drive and other jacks.
This low-frequency enclosure is comprised of a single 18 in. Pro Rider subwoofer driver in a vented alignment. The Pro Rider driver delivers superior performance due to its advanced cooling system, large 4 in. voice coil with edge wound aluminum wire and carbon fiber/Kevlar composite cone. This design provided strong bass extension and high power handling to complement a full-range sound system. Four high-flow molded vents provide venting and support for the grille.
As the SP118 does not include a passive subwoofer crossover, input should be electronically filtered for subwoofer applications. In addition, for high power operation, a high-pass filter set at 35 to 40Hz and 12 to 24 dB Butterworth should be used to improve performance and reliability.
Technical Info
Dimensions (H x W x D): 30.750 x 20.875 x 29.250 in. (781 x 530 x 743 mm)
Net Weight: 84.5 lbs (38.4 kg)
Frequency response, 1 meter on-axix, swept-sine in anechoic environment: 49Hz to 300Hz (+/- 3 dB)
Usable low frequency limit (-10 dB point): 34Hz
Power handling:
600 Watts continuous
1,200 Watts program
2,400 Watts peak
Maximum sound pressure level (1 meter):
126.0 dB SPL continuous
132.0 dB SPL peak
Radiation angle measured at -6 dB point of polar response: essentially omnidirectional
Transducer complement: One 18 in. woofer, vented 1808-8 ALCP Pro Rider
Box tuning frequency: 42Hz
Minimum recommended active crossover frequency and slope for bi-amping:
90Hz at 18 dB/octave
High-pass filter 35 to 40 Hz at 12 to 24 dB/octave is recommended
Imdedance (2):
Nominal: 8.0 ohms
Minimum: 6.5 ohms
Input connections:
One 4-pin Neutrik jack
Two 1/4 in. jacks
All inputs in parallel
Enclosure materials and finish: Birch plywood with internal bracing, heavy-duty black carpet and reinforced with powder-coated steel corners
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