AXIOM Passive, 21" Horn-Loaded Subwoofer system, 8 ohm, 1.500 Program Power

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The SW121HLP subwoofer is designed to deliver high-quality low frequency reproduction where very high output is a key requirement, together with well defined and deep basses and fast transient response.

The SW121HLP is a high-performance subwoofer with a special configuration based on a small cavity behind the speaker and a very compact horn. With this special design and a particular digital processing, the SW121HLA can be used as an infra-sub and it can provide an impressive low-frequency extension and a “punchy” feeling in the upper bass range.

The SW121HLP is equipped with a 21” (533mm) transducer capable of long excursion (up to 70mm peak-to-peak) and controlled by a Double Silicon Spider. The robust copper 135mm (5.3”) voice coil is wounded in four different layers both outside and inside the coil support, then improving the long term thermal capacity of the loudspeaker. Cones are made in cellulose with a special carbon fiber treatment to increase resistance and durability.

  • Very High Output
  • Compact size for a very good output-to-weight ratio
  • Horn-loaded configuration
  • High-strength, water repellent cone

System’s Acoustic Principle                   Horn-Loaded Subwoofer
Frequency Response (±3dB)                 32 Hz  –  85 Hz    (Processed)
Maximum Peak SPL @ 1m                      145 dB 
Type                                                              Single Neodymium 21” (530mm), 5.3” (135mm) VC 
Cone                                                             Carbon fiber reinforced treated cellulose cone
Voice Coil Type                                          Split winding four layers ISV copper coil
Suspension                                                 Triple Silicon Spider
Connector Type                                        Neutrik® Speakon® NL4 x 2
Input wiring                                                Pin 1+/- = LF; Pin 2+/- = NC
Continuous AES Pink Noise Power    1800W
Program Power                                        3600W
Peak Power                                                8000W
Power Compression    
@ -10dB (180W + 180W)                        0.7dB
@ -3dB (900W + 900W)                           1.5dB
@ 0dB (1800W + 1800W)                       2.2dB
Physical Dimensions    
Width                                                           589 mm (23.18”)
Height                                                          801 mm (31.53”)
Depth                                                           1022 mm (40.23”)
Enclosure Material                                   15mm, reinforced phenolic birch
Paint                                                             High resistance, water based paint
Wheels                                                         4 heavy-load 100 mm ø
Net Weight                                                 72 Kg (158.70 lbs.) - without wheels

Artikel document SW121HLP_data-sheet.pdf
Merk Axiom
Power connector Powercon
BxDxH in cm 58,9 x 102,2 x 80,1cm
Gewicht in Kg 72 Kg
Constructie materiaal Multiplex
Constructie materiaal specifiek 15mm, reinforced phenolic birch
Verkrijgbare kleuren Zwart
Soort luidsprekersysteem Passief mobiel
Type luidspreker Subwoofer
Systeem type Horn-Loaded
Audio connector Speakon
Belastbaarheid continue RMS 1800W
Belastbaarheid peak 8000W
SPL peak 145dB
Frequency respons 32Hz - 85Hz (Processed)
Crossover frequentie 85Hz
Luidsprekerformaat Low 21"
Input digitaal ETHERCON (NE8FAV)
AD/DA converter CORE processing, 96kHz / 40bit floating point SHARC DSP, 24 bit AD/DA
Remote Control Connection CANBUS
Remote Controle Software PRONET control software

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