Celto Pro · LF Drivers Series
21SW1800-8
SKU: 21SW1800-8
A 21-inch premium low-frequency transducer featuring 1800W RMS power handling and high displacement, engineered for high-performance professional subwoofer designs.
Request a Quote for This Product Request system design Talk to an audio expert · +90 216 469 83 352-year distributor warranty · Original product · Engineering support
Overview
The Celto Pro 21SW1800-8 is a 21-inch (533mm) premium transducer designed to deliver deep, powerful low-frequency performance in professional sound reinforcement systems. Featuring an 1800W RMS (AES) power rating and 98 dB (1W/1m) sensitivity, it ensures high efficiency in demanding acoustic applications.
The driver is built with a 4.5-inch (115mm) dual-layer (IN/OUT winding) copper voice coil, utilizing a 240 degree high-temperature PI copper wire on a Dupont GFB fiberglass former. With a linear excursion (Xmax) of ±13.25 mm and a peak-to-peak mechanical limit (Xmech) of 62 mm, it maintains linear depth and low distortion even under extreme displacement. Boasting a low resonance frequency (Fs) of 30 Hz, this transducer is an ideal engineering choice for fixed installations, portable systems, and touring applications.
Technical Specifications
21SW1800-8 · SKU 21SW1800-8
| ACOUSTIC PERFORMANCE | |
|---|---|
| Nominal Impedance | 8 Ω |
| Power Handling RMS (AES) | 1800 W |
| DRIVERS | |
| Voice Coil Diameter | 4.5" (115mm) |
| Voice Coil Height (Hvc mm) | 34 |
| Voice Coil Air Gap (Hag mm) | 15 |
| Voice Coil Winding | 2 layers IN/OUT |
| Voice Coil Material | 240°C PI Copper |
| Voice Coil Former | DUPONT GFB fiberglass |
| SIGNAL PROCESSING | |
| Sensitivity (1W/1m) | 98 dB |
| PHYSICAL | |
| Rms (kg/s) | 8.232 |
| Net Weight (kg) | 16 |
| OTHER | |
| Nominal Diameter | 21" (533mm) |
| Fs (Hz) | 30 |
| Qms | 8.4 |
| Qes | 0.402 |
| Qts | 0.384 |
| Vas (liters) | 281 |
| Mms (g) | 355 |
| Sd (cm²) | 1632 |
| Re (Ω) | 5.36 |
| BL (Tm) | 30.3 |
| η0 (%) | 2.0 |
| Le (mH @1kHz) | 2.2 |
| Cms (mm/N) | 0.074 |
| Xmax (±mm) | ±13.25 |
| Xmech (peak-peak mm) | 62 |
| Overall Diameter (mm) | 546 |
| Bolt Circle Diameter (mm) | 514 |
| Baffle Cutout Diameter (mm) | 494 |
| Flange/Gasket Thickness (mm) | 14 |
| Overall Depth (mm) | 229 |
21SW1800-8 · 2-year distributor warranty · Original product · Engineering support
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Frequently Asked Questions
What is the price of 21SW1800-8?
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