We outdid ourselves again, first it was the V18 and now this subwoofer – the V21 takes Procella low frequency performance to 11. That’s why we call it The Bass Engine!


The V18 has long been the standard for low frequency reproduction. But for some, even the V18 wasn’t enough! For them, we created the V21 Bass Engine. Producing 139 dB of continuous output and a peak output of 145 dB, this is truly the new reference standard for subwoofers. In an impressively massive, deep enclosure (unlike the slim P18), Procella’s unique V-Loaded driver configuration produces coupling and compression loading between the drivers, resulting in lower distortion, improved transient response, and reduced cone excursion at high SPL. Its twin 21 inch long-throw pro audio subwoofer drivers have Neodymium magnets and 4,5 inch voice coils, with added aluminum demodulation rings to decrease distortion. A true subsonic generating engine, its response extends to 18 Hz at high output levels. The V21 requires external power. The amplifier also needs to provide DSP control or PEQ settings in a processor such as Trinnov to accommodate room boundary conditions. For lifelike low frequencies for both movies and music, the V21 is the ultimate choice!


frequency respons

–3 dB point of 18 Hz

maximum SPL

139dB continuous, 145dB peak


Dual Long-throw professional 21" drivers with 4.5" VC, Aluminum demodulation ring and Neodymium magnets in a 255L sealed box


106dB 1m/1W


2x 8 Ohms nominal


Void free MDF internally cross braced Semi matte textured black paint finish


Dual Hevy-Duty Gold plated Binding Posts


external, Sold seperately

dimensions and weight

81kg / 179 Lbs, WxHxD 1050 x 600 x 670mm, WxHxD 41,4" x 23,6" x 26,4"

shipping carton

1200 x 850 x 800mm Palletized crate, 47.25" x 33.5" x 31.5" Palletized crate, 99kg / 219 Lbs


Damper feet, Installation Guide, Protective Grill


Sweden 100% QC testing

DSP settings

Against wall, In baffle wall, In corner

power handling

Continuous 2 x 1.700 Watt, Peak 2 x 3.200 Watt