Due to its complex ATL™ the twenty.21 has significantly more dynamic grip and depth of bass than any other speaker of this size.


Technical Data:

Available Finishes Jet Black
Crossover Frequency 1.8kHz
Dimensions H 325mm 12.8” × W 152mm 6.0” × D 277mm 11.0” (+6mm grille)
Drive Units LF PMC twenty series, lightweight doped 5.5”/140mm cone with cast alloy chassis, HF PMC/SEAS®, 27mm twenty series, SONOLEX™ soft dome, Ferrofluid cooled
Effective ATL™ Length 1.72m / 5.6ft
Frequency Response 50Hz – 25kHz
Impedance 8Ohm
Input Connectors 2 pairs 4mm sockets (Bi-amp or Bi-wire)
Sensitivity 87dB 1w 1m
Weight 5kg (11lbs)
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