The POPE Professional® ML-221B dual 21” compact sub-woofer enclosure with its high sensitivity OEM B&C transducer, is designed ground up to provide sub frequency extension to modern sound reinforcement applications.




• Live Sound
• Touring Concerts
• Club Systems
• Large Nightclubs
• Arenas


• 2*21" (530 mm) Diameter OEM B&C Transducer
• 4.5” (116 mm) voice coil
• High sensitivity (98 dB @ 1m/1w)


Model ML-221B
Article No. #10137
Class 2*21” Sub-woofer
Power Rating 3400 W Continuous
6800 W Program
13600 W Peak
Frequency Range (-10dB) 22Hz - 160Hz (-10dB, half space)
24Hz - 160Hz (-6dB, half space)
System Sensitivity (1W @ 1M) 98dB SPL
Maximum Rated SPL 134dB continuous, 137dB peak
Transducer Sections
Low Frequency 2*21" (530 mm) Diameter B&C® Transducer
Power Rating 2*1700 Watts Continuous. Pink Noise
2*3400 Watts Program
2*6800 Watts Peak
Voice Coil 153 mm (6")
Voice Coil Material Copper
Former Material Glass Fibre
Magnet Material Neodymium
Chassis Type Cast Aluminum
Nominal Impedance Parallel: 4Ω
Discrete: 8Ω x 2
Crossover Mode Bi-amp
Box Construction Rectangular cabinet, 18 mm, 11-ply plywood
Transportation 2 handles on both sides
Grille Powder coated, black, 16-gauge perforated steel grille with charcoal foam backing
Input Connectors Neutrik® Speakon® NL4MP (x2) +2-2
Surface Finish SoundFlex® environment friendly coating
Coverage Pattern (H x V) 360°
Packing Foam with wooden crate carton packing or Flight case - optional
Dimensions (H x W x D) 700 mm x 1324 mm x 1000 mm
Net Weight 109 kg (240.24 lbs)
Gross Weight 129 kg (284.32 lbs)