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Q-SB2 Sub Bass Supplement for Q-12A Speaker Systems

For Low-Frequency Response at High Sound Pressures

Q-SB2 Sub Bass Supplement for Q-12A
Q-SB2 Sub Bass Supplement



The Q-SB2 is Soundsphere’s largest loudspeaker, designed for installations requiring enhanced low-frequency response at high sound pressure levels. For use in Q-12A loudspeaker systems

For Installations Requiring: • Enhanced Low Frequency Performance

Ideal for • Gymnasiums • Ice Rinks • Arenas • Churches • Bars • Nightclubs • Amusement Parks • Applications where Enhanced Low Frequency Response at High Sound Pressure Levels is Required

The Q-SB2 offers high power handling capability (800W/4 ohms), high sensitivity (99dB 1W/1m) and high SPL capability (128dB 800W/1m). Both standard and custom colors are available.     read more...
Q-SB2 Features:
  • 32 in. sphere diameter
  • High Power Handling Capability (800W/4 ohms)
  • High Sensitivity (99dB 1W/1m)
  • High SPL Capability (128dB 800W/1m)
  • Standard and custom colors available
  • Made in the USA
Q-SB2 Specifications:

Sensitivity 99 dB SPL; 1W/1m
Maximum SPL 128 dB; 800 Watts/1m
Power Handling 800 Watts RMS
Frequency Response 40 Hz to 200 Hz ± 6 dB
Recommended Crossover Frequency 150 Hz, 18 dB / octave
Coverage 360° vertical
360° horizontal
Rated Impedance 4 ohms
Weight 82 lbs. (37.2 kg)
Sphere Size 32 in. dia. (815mm)
Driver 2 x 18 in.
Material Enclosure is fiberglass with gelcoat finish
Connector Neutrik® Speakon® NL4MPR receptacle, mating connector (Neutrik® Speakon® NL4FC) supplied
Accessories Electronic crossover Model Q-CX
Q-CX Electronic Crossover:

The Model Q-CX is a compact electronic crossover designed to produce proper performance of the Model Q-SB2 in a system with Model Q-12A loudspeakers.

Model Q-CX Electronic Crossover Typical Application

Q-CX Crossover

Q-CX Specifications:

Phoenix-type compression terminal block. Optional connector kits are available for applications requiring XLR or 1/4 in. phone plug connectors. Inputs and outputs are electronically balanced.
Filter Slope 18 dB / octave
Crossover Frequency 150 Hz (-3dB)
Power Supply 24-30 VDC @ 100mA
Power Supply Connection Phoenix-type compression terminal block
Dimensions 4.5 in. L x 2.2 in. W x 0.75 in. H
Weight .5 lbs. (.23 kg)
Q-SB2 Related Items:


Universal Beam Clamp



Three way cable for single point suspension


Q-SB2 Images:

Q-SB2 Application


Q-SB2 Drawing

Architects and Engineers Specifications

The loudspeaker shall be a self contained low frequency device. The frequency response shall be 40Hz to 200Hz ±6dB; the vertical and horizontal polar coverage shall be ±2dB over 360°. The loudspeaker shall have a minimum sensitivity of 99dB 1W/1m, a continuous power handling capability of 800 Watts RMS, and a rated impedance of 4 ohms. The loudspeaker driver complement shall be two 18 inch bass units. The drivers shall be mounted in a spherical enclosure made of fiberglass. Three eyebolts shall be supplied to facilitate hanging. All hardware shall be stainless or plated steel. The enclosure color shall be ordered in advance, otherwise white shall be supplied. The loudspeaker shall be comprised of a 32 inch (813 mm) diameter sphere with two 18 in. drivers mounted on opposing sides. The complete loudspeaker shall be 32 inches (813 mm) in overall height and weigh 82lbs. (37.2kg). The loudspeaker shall be the Soundsphere Model Q-SB2.