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Unparalleled LF performance 

Useable Output to 25hz 

Extreme Powerhandling 


Suitable for any application where extreme low frequency extension

and output is required.


The 21FLH28,code name, “The BattleAxe” is a high intensity Front Loaded Horn designed for very deep extension, with an intended passband 28hz-100hz, employing a 24db/octave 25hz buttersworth hipass.


The enclosure is loaded with a 21′ long-throw subwoofer.  This enclosure is optimized for clusters of 4 or more, with optimum sensitivity being achieved from a block of 8. However, the output from a  single BattleAxe is nothing short of stunning.


The enclosure is available in passive only. 

System Alignment: 21 Inch loaded Front Loaded Horn

System Response (-10db): 22hz

Frequency Response (-3db): 28hz-150hz

Power Rating (Continuous Program Peak): 1700w/3400w/7000w

Sensitivity (Iw/I meter): 107db

Nominal Impedance: 4ohm or 8ohm Available

Reccomended Processing: 4 Ohm 25hz, 24 db/octave Buttersworth Hi-pass, 60-100hz Low-pass

Enclosure Construction: Precision CNC construction, 18mm Baltic birch 30mm baffle

Exterior Coatings: Polane (Custom Colors Available)

Grille Specifications: Optional 16 Gauge Black Powder-coated Steel

Dimensions (DxHxW): 52.5x50x25.5 inches

Net Weight: 340lbs

Mobility: Available with OPTIONAL 2″ Locking swivel casters or custom dollies

For sound system quotes, please fill out this form to have a sales representative contact you!