The Thunder-KMT21P is a high-performance passive subwoofer designed with a powerful peak output of 136 dB to provide high-quality audio in the low frequency range for use in mid to large applications. The KMT21P features a 1800 W 21" drive unit with magnet structure and suspension engineered for maximum linear excursion.
The Thunder-KMT21P is ideal for medium throw applications, like theaters, concert halls, and AV installations.
Unique Performance-to-Size Ratio
Produces an impressive high-power performance by producing a high SPL from a small frame.
We have the ability to customize your project by color matching your system to any RAL code to help you to better integrate the speakers into a wide variety of venues.
We created a portfolio complete with lightweight products that are easy to transportation and quick to setup optimizing logistics, space, labor costs and time.
Four-Corner Port Configuration
The unique four-corner port configuration provides symmetrical back loading to the speakers, for extended bass response with very low distortion.
With the dedicated K-dante accessory, this solution can be integrated into a Dante network making it interoperable with other devices.
- Type Passive subwoofer
- Transducers 21" neodymium magnet woofer
- Frequency Response (1) 35 Hz – 150 Hz (-6 dB)
- Maximum SPL (2) 136 dB (peak)
- Rated Power 2800 W
- Coverage Omni
- Connectors speakOn NL4 1+ 1- (signal); 2+ 2- (through)
- Nominal Impedance 4 Ω
Handling and Finishes
- Dimensions (W x H x D) (3) 555 x 572 x 763 mm (21.8 x 22.5 x 30 in)
- Weight 40 kg (82.2 lb)
- Material Wood
- Color Black, White, Custom RAL
- IP Rating IP43
- Notes for data:
(1) With dedicated preset
(2) Maximum SPL is calculated using a signal with crest factor 4 (12dB) measured at 1 m.
(3) Included 17 mm (0.7 in) removable rubber feet
Passive loudspeakers require dedicated presets loaded on K-array amplifiers.
New materials and designs are introduced into existing products without previous notice.
KMT21P DatasheetVer. 2.0
KMT21P User GuideVer. 1.3
Ease DataVer. 4.0
KMT21P PresetVer. 3.0
KMT21P DWG 3DVer. 3.0
KMT21P DXF 2DVER. 5.0
KMT21P PDF 3DVer. 3.0
KMT21P LayoutVer. 1.1
K-framework 2.2.8 - WindowsVer. 2.2
KMT21P Architect SpecsVer. 1.0
KMT21P 3DS 3DVer. 1.0
EASE Focus 3 Download
Thunder & Systems Certificationsver. 1.0
Amp-to-Speakers TableVer. 2.1
Thunder-KMT21P can be successfully used in a range of different settings and events.