Celto Pro · CSW Series
CSW221
SKU: CSW221
Dual 21-inch, 3600 W RMS high-performance professional subwoofer system.
- Max SPL
- 137 dB RMS / 143 dB Peak
- Frequency Response
- 28 Hz – 1 kHz
- Driver Configuration
- 21"
- Dispersion
- Omni in usable range
- Weight
- 99 kg (218.3 lb)
2-year distributor warranty · Original product · Engineering support
Overview
The Celto Pro CSW221 is a high-performance, dual 21-inch subwoofer system engineered to deliver exceptional low-frequency reproduction in demanding professional audio applications. Featuring a power handling of 3600 W RMS (14400 W Peak) and a maximum SPL of 137 dB RMS (143 dB Peak), it provides outstanding bass performance and headroom.
The enclosure is constructed from premium exterior-grade Birch Plywood, heavily braced with Tongue & Groove joints to eliminate unwanted resonances. It houses two 21-inch CELTO 21SW2000-8 transducers, equipped with 4.5-inch (115 mm) long-throw voice coils and die-cast aluminum chassis. Operating in active mode only, the CSW221 offers a wide frequency response of 28 Hz to 1000 Hz, making it highly versatile for various venue designs. The cabinet includes two M20 threaded sockets for mounting and genuine Neutrik Speakon NL4MP connectors for secure, reliable connectivity.
143 dB
MAXIMUM PEAK SPL
28 Hz – 1 kHz · Frequency Response
Technical Specifications
CSW221 · SKU CSW221
| ACOUSTIC PERFORMANCE | |
|---|---|
| Speaker type | Multi-purpose vented Subwoofer |
| Power Handling (AES standard) | 3600 W RMS / 14400 W Peak |
| Nominal impedance | 4 Ω |
| Average sensitivity | 102 dB / 1 W / 1 m |
| Maximum SPL (calculated) | 137 dB RMS / 143 dB Peak |
| Frequency response (-6 dB no preset) | 28~1000 Hz |
| Nominal directivity (-6 dB) | Omni in usable range |
| Crossover | No, active mode only |
| DRIVERS | |
| LF | 2x 21" CELTO 21SW2000-8 |
| Woofer Chassis | Die Cast Aluminium |
| Woofer Voice coil | 4.5" / 115 mm long throw |
| CABINET & MOUNTING | |
| Cabinet | Exterior grade Birch PlywoodHeavily braced with Tongue & Groove |
| Cabinet finish | Textured Waterborne Black coatingAcoustic PU foam behind Front grill |
| Flying hardware | No |
| Mounting hardware | 2pcs M20 thread socket |
| CONNECTIVITY | |
| Connectivity | Genuine NEUTRIK 2pcs Speakon NL4MP |
| PHYSICAL | |
| Speaker size (HxWxD) | 588 x 1 226 x 805 mm |
| Speaker Weight | 99 kg (218.3 lb) |
| Shipping information | 112 kg710 x 1 380 x 915 mm |
| Accessories | CSW221-SBAG (padded cover bag)CPC-70 (pole bar with crank)SUBWHKIT100C (castor wheel kit) |
CSW221 · 2-year distributor warranty · Original product · Engineering support
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Frequently Asked Questions
What is the price of CSW221?
Pricing depends on your project configuration. Contact our engineering team to determine the most suitable setup and receive a current quote.
What does the distributor warranty cover?
Every system we install is our direct responsibility for two years against manufacturing defects, with scheduled measurement, calibration and maintenance support.
How is product originality guaranteed?
We import all required parts and products directly from the manufacturer's factory, preserving the authenticity of the system.
How does the design & quote process work?
Let us build the acoustic infrastructure of your project to engineering standards with needs analysis, detailed venue exploration, and accurate technical guidance.
2-year distributor warranty · Original product · Engineering support