THEY WILL MOVE YOU!

The B-52 SPF-18A and SPF-1818A are designed for large permanent installation venues. They combine the advantage of a long throw folded horn design with the power and reliability of B-52's digital amplification. A 24 dB / octave electronic crossover, compressor and hard limiter are built into the amplifier allowing these subwoofers to easily patch into an existing system with just pair of full-range XLR input cables! These cabinets are built using 13-ply Baltic birch, scratch-resistant paint, will withstand the abuse of the road and can be used as dance platforms!

SPF-18A
18” ACTIVE FOLDED HORN SUBWOOFER

The B-52 SPF-18A is powered by our award-winning 1200-watt digital amplifier. The 6 lbs amplifier has the ability to power a secondary passive subwoofer - the SPF-18S. The SPF-18A includes all the features needed in an active subwoofer: 24 dB / octave electronic crossover, a compressor/ limiter, subsonic filter, phase switch and both full-range and high-pass outputs.

AMPLIFIER FEATURES:
* Made in the U.S.A.
* 1200-watt RMS digital amplification
* 800 watts RMS @ 8 Ohms (SPF-18A)
* 1200 watts RMS @ 4 Ohms (SPF-18A & SPF-18S connected / SPF-1818A)
* Crossover slope: 24 db/octave
* Subsonic filter: 30 Hz
* Built-in compressor / limiter
* XLR balanced inputs
* XLR balanced FR & 120 Hz HP outputs
* 0–180° phase switch
* Neutrik speaker output (SPF-18A)
* Full thermal & short circuit protection
* Signal sensing on/off circuitry

SPF-18S
18” PASSIVE FOLDED HORN SUBWOOFER

The B-52 SPF-18S is a passive version of the SPF-18A that utilizes the same B-52 18-200L, 4” voice coiled 1000-watt subwoofer. It can be powered by the SPF-18A (using the Neutriktm Speakon output on the SPF-18A amplifier) or via a conventional rack-mount amplifier. It features a solid Birch construction, tilt-back handles and 4” casters.

B-52 18-200L 18” Subwoofer
The B-52 18-200L 18” subwoofer features a cast-aluminum frame, 200 oz magnet structure, a bumped back plate for greater excursion and a 4” dual-layered tempered-aluminum voice coil. The voice coil is wound with 4 layers of 26-gauge copper wire, optimally sized for this motor.

THE DIGITAL DOMAIN
The lightweight digital amplifier is more than 93% efficient, draws less power than conventional amplifiers and therefore generates less heat. Less heat translates to longer device life, more efficient operation and unparalleled reliability.

ELECTRICAL DRAW
B-52’S digital amplifier draw less than 12 amps of electricity at full volume. So whether you’re throwing a party near a nuclear power plant, or a house party with only a 15 amp breaker, the SPF-18A or SPF-1818A can be plugged in virtually anywhere without the risk of popping a circuit breaker.

18” SUBWOOFER
The B-52 18-200L 18” subwoofer features a cast-aluminum frame, 200 oz magnet structure, a bumped back plate for greater excursion and a 4” dual-layered tempered-aluminum voice coil. The voice coil is wound with 4 layers of 26-gauge copper wire, optimally sized for this motor. CABINET CONSTRUCTION
The SPF18A and SPF-18S cabinest are built for the abuse of the road and to stand-up to the pounding club scene for installation. These subs are constructed with 13-ply Baltic birch and are backed by our unequalled warranty.

COMPRESSION CHAMBER
The SPF-18A and SPF-18S cabinets house a compression chamber that minimizes the excursion of the driver while maximizing the subwoofer’s output. The optimally-sized acoustic aperture of the compression chamber forms the throat of the horn and helps force air at an increased velocity and pressure. The compression chamber optimizes the horn’s output, allowing the the subwoofer to achieve amazing and unprecedented output levels.

SPF-18A digital amplifier
All Architectural Series folded horn subwoofer cabinets feature 13-ply Baltic birch construction, scratch resistant black or white paint finish and a LIFETIME construction warranty.