Electro-Voice SB121 User Manual
Sb121, Key features, General description
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
Sb121
12” 300-Watt
Bass Module
General Description:
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.
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.
Technical Specifications:
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