Component: 250 mm (10 in) dual voice coil transducer
Stereo inputs with high-pass outputs for satellite speakers
Slot-load vented bandpass design
Complements full-range Control Contractor Series systems
High Sensitivity: 100 dB, 1 W, 1 m
The Control SB-2 provides low frequency reinforcement in subwoofer/satellite systems. The Control SB-2 is ideal for foreground music and music/paging systems in restaurants, retail establishments, theme bars, music cafes, health clubs, and other indoor applications.
The unique slot-load vented design provides acoustic low-pass filtering. Compared to traditional bandpass subwoofers, the SB-2 offers superior musical clarity and bass impact.
The satellite outputs are highpass filtered, reducing overall system distortion by eliminating the need for the satellite speakers to reproduce frequencies in the low bass range. The satellites operate more efficiently, maintaining excellent midrange clarity and realism in music and paging. The high-pass filtering also allows a greater number of satellite speakers to be paralleled in the system by increasing the impedance the amplifier sees in the subwoofer range. The stereo inputs are 8 ohms each.
The combination of the satellite high-pass filtering, the acoustic slotload filtering and a built-in 2nd order low-pass crossover network results in smoother overall system frequency response and virtually eliminates the ômuddinessö typical of other subwoofer/satellite systems by reducing frequency overlap in the low midrange.
Control« SB-2 Stereo Input Dual Coil Subwoofer The Control SB-2 incorporates a long-excursion 250mm (10in) transducer providing usable output to 38 Hz. Dual voice coils on the transducer allow the single cabinet to reproduce subwoofer frequencies for both the left and right channels while maintaining channel separation in the satellites.
Subwoofer placement can be used as a tool for adjusting output sensitivity to match that of the satellite speakers and the requirements of the application.
Positioning the SB-2 at the junction of three boundaries (i.e. - at a floor/wall/wall or ceiling/wall/wall junction) yields maximum output sensitivity for use with high sensitivity satellites or for subwoofer-heavy applications.
Placement at the junction of two boundaries (i.e. - floor/wall,ceiling/wall or wall/wall) reduces the subwoofer level by 3 dB. Placement in the middle of a single boundary (i.e. - wall, floor or ceiling) further reduces subwoofer output sensitivity by another 3 dB, to match with less efficient or higher impedance satellite systems.
Frequency Range (-10 dB): 38 Hz-160 Hz
Continuous Program Power Capacity1: 340 Watts (both inputs driven)
170 Watts (each input) x 2
Sensitivity2: 100 dB (1 W, 1 m) at corner junction (/2 loading)
97 dB, at two boundary junction ( loading)
Nominal Impedance: 8 ohms per input; 4 ohms total with both inputs paralleled.
Network Filter to Subwoofer: 12 dB/oct low-pass (per input), 160 Hz
Acoustic Filtering: 6 dB/oct low-pass filtering via slot-load design, 80Hz
Network Filter to Satellite Outputs: 6 dB/oct high-pass (per output)
Satellite Impedance: 4┘ load per Satellite Output recommended
Optimum System Configuration: Four JBL Control 23 satellite speakers (two on each SB-2 satellite output) provide optimum sensitivity balance and impedance loading, resulting in full-range 38 Hz - 22 kHz system performance. Broadband impedance is 4┘ per input x 2 channels.
Driver: 250 mm (10 in) long-throw with dual voice coils Enclosure Material: Particle Board Terminations: Spring terminals, accepts banana plugs. Left In,
Right In, Left Satellite Out, and Right Satellite Out Installation Accessories: MTC-SB2W for installing SB-2 onto a wall or into a corner
MTC-SB2C for suspending SB-2 from ceiling
Dimensions (H x W x D): 394 x 585 x 343mm (15.5 x 23.0 x 13.5 in)
Net Weight: 19.1 kg (42 lbs)
Shipping Weight: 22.7 kg (50 lbs)