The SB 221 is a bass subwoofer speaker with an operating range down to 28Hz. The SB221 composed two 21" LF trancducer integrated into a twin bandpass enclosure with frontal horn. This approach, which brings togehter several conventional technology’s, is capable of reproducing extreme low frequencies with massive impact, giving an output level of 130dB.

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Technical Info

Usable Bandwidth: 28 Hz – 120 KHz
SPL: 104 dB
Power Handling: 3000 W RMS


LF: 2 x 21” Weather-resistant - 4 ohm

Physical Data

Width: 1350 mm

Height: 598 mm

Depth: 900 mm

Weight: 105 Kg

Suspensions Points: Optional - 4 Aeroquip System

Material: Baltic Birch Plywood

Connections: 2 x 4 Pin Speakon