The M4.21 is a very high power, high SPL quad subwoofer system.
Using a hybrid horn loading technology, we have achieved significant increase in the SPL capabilities of the system with no sacrifice to the low end extension, and managed to create a system that can easily replace and outperform a stack of 4 conventional 2×21 inch reflex loaded boxes while using half the required amplifier power. This will gain significant investment savings for the customers.
The system is loaded with 4 heavy duty 21 inch 2000W AES power handling low frequency transducers with 135 mm (5.3 in) outside-inside voice coil, weather protected carbon fiber reinforced cellulose cone capable of 72mm peak to peak maximum cone excursion. The advanced technology implemented in this driver is making it a very unique and one its kind, placing it directly to the very top in today’s transducer industry.
M4.21 quad subwoofer system has a combined sensitivity of 111db 1w/1m boasting incredible 152db of peak SPL.
Having all this in place it makes the system very capable of covering the most demanding subwoofer application.
|Usable bandwidth (-3db):||30Hz – 200Hz (M.421 DSP settings)|
|Nominal directivity (-6db):||Omnidirectional|
|Maximum system SPL:||152db (M4.21 DSP settings) calculated for 4 boxes|
|Program power handling capacity:||4000W per element or 16000W per quad stack|
|Components:||Neodymium magnet 21inch driver with 135mm (5.3 inch) voice coil, capable of 72mm peak to peak maximum cone excursion|
|Nominal impedance:||4 or 8 ohm|
|Physical:||WxHxD 750x580x1150mm. Weight: 82kg|
|Material:||Baltic birch plywood|
|Finish:||Black textured water based coating|
MM-acoustics reserves the right to change specifications without prior notice.