The POPE Professional® ML-21B single 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


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


Model ML-21B
Article No. #10136
Class 21” Sub-woofer
Power Rating 1700 W Continuous
3400 W Program
6800 W Peak
Frequency Range (-10dB) 22Hz - 160Hz (-10dB, half space)
24Hz - 160Hz (-6dB, half space)
System Sensitivity (1W @ 1M) 98dB SPL
Maximum Rated SPL 131dB continuous, 135dB peak
Transducer Sections
Low Frequency 21" (530 mm) Diameter B&C® Transducer
Power Rating 1700 Watts Continuous. Pink Noise
3400 Watts Program
6800 Watts Peak
Voice Coil 116 mm (4.5")
Voice Coil Material Copper
Former Material Glass Fibre
Magnet Material Neodymium
Chassis Type Cast Aluminum
Nominal Impedance
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) 675 mm x 700 mm x 1000 mm
Net Weight 59 kg (130.04 lbs)
Gross Weight 75 kg (165.30 lbs)