21” (530mm), Very High Output, Horn-loaded, Powered, CORE Processed, Subwoofer System

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  • The SW121HLA 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 SW121HLA is a high-performance powered 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 SW121HLA 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.

    The system processing is based on the CORE DSP platform designed by the PROEL R&D Laboratories using one of the most advanced SHARC DSP for audio application. It features 40bit, 96kHz floating point resolution and top-quality 24bit AD/DA converters, for a perfect signal integrity, a dynamic range in excess of 110dB and a superior sonic performance. Thanks to its massive processing power, the CORE platform is capable of providing the most sophisticated algorithms for speaker processing, together with remote control and networking capability.

    The PRONET control software, working on a solid and reliable CANBUS based network protocol, provides an intuitive interface for the remote control of the whole system, with the possibility of eqing, delaying, increasing the protections and monitoring the status of the amplifier.

    The SW121HLA is powered by DA SERIES digital power modules, a new generation of CLASS D power amplifier with digitally-controlled SMPS.  The innovative technology used for these amplifiers (including also the use of a variable switching frequency) offers performances at the top of the range, such as a superior sound definition at any audio frequency, very high dynamics also for low level signals and very low distortion even at the maximum power The superior sound quality can be compared with top-of-the-range AB-class analog systems, while the DA modules feature a higher dynamics, very compact size and light weight and efficiency above 90%.

    The DA module employed for powering the SW121HLA includes a universal regulated switch mode power supply with PFC (Power Factor Correction) and delivers in an ultra-compact package a maximum power of 4000W.

    • Very High Output
    • Compact size for a very good output-to-weight ratio
    • Horn-loaded configuration
    • High-strength, water repellent cone
    • 96KHz / 40 bit floating point CORE processing with PRONET remote control
    • Digitally controlled Class D amplifier module with SMPS
    System’s Acoustic Principle Horn-Loaded Subwoofer
    Frequency Response (±3dB) 31 Hz  –  80 Hz    (Processed)
    Maximum Peak SPL @ 1m 141 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
    Input Impedance 20 kΩ balanced, 10 kΩ unbalanced
    Input Sensitivity  +4dBu / 1.25 V
    Signal Processing CORE processing, 96kHz / 40bit floating point SHARC DSP, 24 bit  AD/DA converters
    Direct access Controls 4 Presets (Standard/InfraSub/Cardioid/ User), Network Termination, GND Link
    Remote Controls PRONET control software
    Network protocol CANBUS 
    Amplifier Type Class D with SMPS and PFC, Variable Switching Frequency
    Output Power 4000W 
    Mains Voltage Range (Vac) 90 - 260V  50/60Hz
    IN / OUT Connectors Neutrik XLR-M / XLR-F
    IN / OUT Network Connectors ETHERCON®(NE8FAV)
    Mains Connector PowerCon TRUE1 (NAC3PX In/Out)
    Cooling Variable speed DC fan
    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 78.2 Kg (172.40 lbs.) - without wheels
    AXIOM_SW121HL_v1_0.zipEASE Focus 3 models
    Presets SW121HLA.zipPresets
    EASE_Focus_v3_1_11 AXIOM GLL.zipEASE Focus 3 Software & Models
    Pronet_Setup_r232.zipPRONET Control Software Release 2.3.2
    Data Sheet
    SW121HLA_data sheet_2017.pdfTechnical Data Sheet
    Technical Drawing
    SW121HLA_2D.dwgTechnical Drawing
    User Manual
    PRONET_manual rel23.pdfPRONET Control Software User's Manual English
    SW121HLA_UM_ENG.pdfUser's Manual English
    USB2CAND USB2CAND USB to CAN converter with two network connectors