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 | |
| System’s Acoustic Principle | Horn-Loaded Subwoofer |
| Frequency Response (±3dB) | 34 Hz – 80 Hz (Processed) |
| Frequency Range (±10dB) | 28 Hz – 321 Hz (Unprocessed) |
| Nominal Impedance | 8 Ω |
| Minimum Impedance | 5.6 Ω @ 43 Hz |
| Sensitivity (1.41V @ 1m, 2Pi) | 104dB |
| Maximum Peak SPL @ 1m | 145 dB |
| TRANSDUCERS | |
| 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 |
| CONNECTIONS | |
| Connector Type | Neutrik® Speakon® NL4 x 2 |
| Input wiring | Pin 1+/- = LF; Pin 2+/- = NC |
| POWER HANDLING | |
| 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 |
| ENCLOSURE & CONSTRUCTION | |
| 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 |
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Software
 | EASE_Focus_v3_1_11 AXIOM GLL.zip | EASE Focus 3 Software & Models |
| AX2010P_SW121HLP_v1_2.zip | Presets for PC260 |
| AXIOM_SW121HL_v1_0.zip | EASE Focus 3 models |
Data Sheet
 | SW121HLP_data sheet_2017.pdf | Technical Data Sheet |
Technical Drawing
 | SW121HLA_2D.dwg | Technical Drawing |
