POWERS ADDITIONAL PASSIVE SUBWOOFER
B-52 active subwoofers (ACT-18 or ACT-18X) are designed to power an additional passive sub. The passive subwoofer (ACT-18S and ACT-18XS) has the same physical dimensions as the active models. Connecting the active subwoofer to an additional passive sub increases the amplifier’s available power output from 800 to 1200 watts.

ACT-18(X) FEATURES & SPECIFICATIONS
• Digital amplifier with voltage tracking power supply
• 800 watts @ 8 Ohms
• 1200 watts @ 4 Ohms
• Max system SPL: 135dB
• Frequency Response: 30-120Hz 
• Rated THD: 0.03%
• Built-in compressor & limiter
• Built-in 24dB / octave crossover @ 120 Hz
• Subsonic filter: 18 dB / Octave @ 30 Hz
• Nominal loudspeaker impedance
• (each subwoofer): 8 Ohms
• Minimum load impedance: 4 Ohms (one active and • • one passive subwoofer)
• Maximum power requirements:
  @ 120 Volts AC = 12 Amps
  @ 230 Volts AC = 6 Amps
• XLR balanced inputs and full-range outputs
• XLR balanced high pass outputs
• 0-180° phase switch
• Speakon-style speaker output connector
• for connecting ACT-18(X)S (passive sub)
• Amplifier thermal & short circuit protection
• Signal sensing circuitry with LED indicator

SUBWOOFER CABINETS
• Superior grade of 13-ply Baltic birch
• Heavy-duty scratch resistant durable black paint
•  finish (ACT-18X, ACT-18XS)
• Carpet finish with tilt-back handle & 3” casters
•  (ACT-18, ACT-18S)
• 16-gauge perforated steel grille for
• maximum protection
• 2 3/8” diameter steel pole-mount cup
• Dimensions (D“ x W” x H“): 23.5 x 32.5 x 22
• Weight: 115 lbs (ACT-18X & ACT-18)
• Weight: 110 lbs (ACT-18XS & ACT-18S)

ACT-18 & ACT-18S
BLACK CARPET FINISH WITH TILT-BACK HANDLE
& 3” CASTERS