SPF-1818S
DUAL 18” PASSIVE FOLDED HORN SUBWOOFER
The SPF-1818S delivers more than 2000 watts of thundering bass that will pound all the way to the back of your venue. While the subwoofers are connected in parallel, precision placed internal dividers allow each driver to fire into the central chamber without any cancellation. Each subwoofer is housed in a compression chamber, which allows the drivers to produce tight, punchy bass without over excursion of the voice coil.

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

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 SPF1818A and SPF-1818S 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-1818A and SPF-1818S 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-1818A 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.