Description
Massive yet musical—the CELTO Acoustique 21SW1800-8 commands 1800W RMS with extraordinary linear excursion and DCS cooling. Its large cone area and optimized parameters produce profound, clean bass down to the lowest octaves. Perfect for flagship sub systems in arenas, theatres, and high-end touring. The 21SW1800-8 proves that bigger can indeed be better—when engineered with precision.
Key Features
- Xtra long excursion, DCS, KEVLAR® cone
Applications
Transducers
Where sound begins
Technical specifications
| Nominal Diameter | 21" (533mm) |
| Nominal Impedance | 8 Ω |
| Power Handling RMS (AES) | 1800 W |
| Sensitivity (1W/1m) | 98 dB |
| Voice Coil Diameter | 4.5" (115mm) |
| Fs (Hz) | 30 |
| Qms | 8.4 |
| Qes | 0.402 |
| Qts | 0.384 |
| Vas (liters) | 281 |
| Mms (g) | 355 |
| Rms (kg/s) | 8.232 |
| 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 |
| 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 Copper |
| Voice Coil Former | DUPONT GFB fiberglass |
| Overall Diameter (mm) | 546 |
| Bolt Circle Diameter (mm) | 514 |
| Baffle Cutout Diameter (mm) | 494 |
| Flange/Gasket Thickness (mm) | 14 |
| Overall Depth (mm) | 229 |
| Net Weight (kg) | 16 |
Product files
| Name | Category | Type | Size | |
|---|---|---|---|---|
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CELTO_21SW1800-8_A0_20250723_WEB_CAD
CELTO_21SW1800-8_A0_20250723_WEB_CAD
|
CELTO_21SW1800-8_A0_20250723_WEB_CAD | 110.0 KiB | Download |
Expand your system
The 21SW1800-8 does wonder when combined with these other products from our range
