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The KS21 is a compact subwoofer that can expand the frequency response bandwidth such as the A15.The KS21's progressive vent design, which greatly reduces turbulence and outlet noise when used at high output, also improves low frequency efficiency.
FEATURE
1 x 2-inch neodymium LF Driver , 1800W
First grade Russian birch plywood with waterproofing Polyurea paint
Equipped with a 21-inch subwoofer transducer in a bass reflex tuning cabinet for powerful bass impact.
L-share vents reduce turbulence and noise while improving lower frequency efficiency.
Acoustically compatible with the A15 single 15-inch speaker, enhancing bass frequency bandwidth to 29 Hz and 31 Hz.
An integrated two-point rigging system for flexible installation options.
Constructed from first-grade birch plywood, the KS21 bass subwoofer cabinet ensures maximum acoustic and mechanical integrity.
The lightweight design, weighing 49 kg / 108 lb, makes it easy to transport and deploy while maintaining rugged durability.
| KS21 Specification | |
| Low frequency limit (-10 dB) | 29 Hz |
| Maximum SPL | 138 dB |
| Nominal directivity (-6 dB) | Standard or cardioid configuration |
| Transducers | 1 × 21″ neodymium cone driver |
| Acoustical load | Bass-reflex, progressive vent design |
| Nominal impedance | 8 Ω |
| Connectors | 2 × 4-point terminal block with push-in connection |
| Rigging and handling | External rigging kits |
| Inserts for rigging plates etc. | |
| Threaded insert | |
| Weight (net) | 49 kg / 108 lb |
| Cabinet | FIrst grade Russian birch plywood |
| Front | Coated steel grill |
| Acoustically neutral 3D fabric | |
| Rigging components | High grade steel with anti-corrosion coating |
| Finish | Dark grey brown |
| Feature | Powerful |
| Clear low-frequency | |
| Stringent rigging conditions | |
DETAIL
RECOMMENDED COMBINATION
①With A15 A-MOUNT
②With A15 A-TILT ANGLE FRAME