Electro Voice DJ Equipment SB121 User Manual

Sb121  
12” 300-Watt  
Bass Module  
Key Features:  
Lightweight -- Only 32 lbs/14.6 kg -- and  
compact  
Very durable polymer enclosure can be  
safely suspended  
Integral handle makes lifting easy  
300 Watt continuous, 1,200 Watt peak power  
handling  
Parallel Neutrik Speakon high current input  
connectors  
Cast frame EV Sb12 12-inch woofer with  
Kevlar reinforced cone  
General Description:  
Technical Specifications:  
Freq. Range (-10 dB): 45 Hz - 600 Hz  
The Electro-Voice ® Sb121 bass module is a compact,  
lightweight woofer system that is designed to add bass  
enhancement to EV Sx Series speaker systems. The Sb121  
combines the advantages of a long-throw 12-inch woofer with a  
lightweight, yet strong polypropylene enclosure. The large vent  
centered on the top of the front helps the woofer move more air.  
The EV Sb12 woofer was developed specially for the Sb121  
and has a specially designed deep frame geometry. At the heart  
of this driver is a magnetic structure optimized to yield the best  
possible combination of performance and output capable in this  
enclosure size. Its Kevlar composite cone and special surround  
give it nearly 2 inches of total excursion capability.  
The Sb121 should be used in conjunction with an active  
crossover with a minimum roll-off rate of 12-dB-per-octave to  
filter response above 200 Hz. It is also sensible to optimize the  
Sb121’s output and protect it by using a subsonic filter at 40 Hz  
in the signal chain. The optional Electro-Voice AC-One  
loudspeaker controller provides easy adjustments for crossover  
filtering, variable subsonic filtering, a flexible 3-band EQ and  
LPN processing for added bass impact.  
Recommended 43 Hz  
High-Pass Frequency:  
Sensitivity (SPL 1W/1m): 95 dB  
Max Calculated SPL: 126 dB  
Power Handling (Cont.): 300 Watts  
Power Handling (Peak): 1,200 Watts  
LF Transducer: 12" EV Sb12 cast-frame long-throw  
Recommended Crossover 90 Hz - 130 Hz  
Frequency Range:  
Impedance: 8 Ohms  
Connectors: (2) Neutrik Speakon NL4  
Dim (H x W x D): 23.1" x 16.9" x 12.3"  
(586mm x 429mm x 312mm)  
Net Weight: 32.2 lbs (14.6 kg)  
Shipping Weight: 35.3 lbs (16.0 kg)  
The Sb121 can handle 300 Watts continuous, 1,200 Watts peak  
and can be safely used with amplifiers in that power range, as  
long as they are not driven to clipping. Using 1/2 or 1/4-space  
loading as well as mutually coupling multiple Sb121’s give this  
small box very impressive output capability. The Sb121’s parallel  
Neutrik Speakon connectors allow loss-free signal connection.  
The enclosure can be stacked, stand-mounted and safely  
suspended using a variety of flexible,inexpensive optional  
hanging kits (See our Suspending System 200 Loudspeakers  
manual for more details). The Sb121 is a truly professional high-  
performance woofer system.  
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