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DAYTON AUDIO SS8-22 Speaker Driver Woofer / Subwoofer
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Dayton Audio SS8-22 Speaker Driver Woofer / Subwoofer 500W 4 Ohm 84.9dB 20Hz-500Hz Ø20.32cm
With the SS8-22, Dayton Audio presents a 20.32cm dual voice coil subwoofer driver. Designed for high-power applications, it combines an anodised aluminium cone with a triple magnet optimised by FEA simulation and a dual spider suspension to deliver 500W RMS power output into 4Ω over a frequency range of 20Hz to 500Hz.
Dayton Audio SS8-22: Aluminium membrane
The SS8-22 uses a thick anodised aluminium membrane, combining lightness and rigidity. This diaphragm resists deformation well, even during significant movements, and maintains strictly pistonic movement throughout the entire excursion. An indexed transition between the cone and the suspension provides additional rigidity at the edges to resist deformation and minimise unwanted resonances. The long-travel butyl rubber suspension completes this assembly, optimised to allow high excursion while maintaining an excellent emissive surface.
Dayton Audio SS8-22: 3-inch coil and advanced thermal management
The SS8-22 is powered by a 2.5 inch voice coil, using four layers of copper, coiled on an aluminium support. This configuration maximises the number of turns in the air gap to increase magnetic force while maintaining a reduced gap, ensuring precision. The aluminium support acts as a heat sink and contributes to stability during prolonged use. Combined with significant ventilation through the sub-cone, suspension, magnetic pole and air gap, this design limits thermal stress and allows for a rated power of 500W RMS.
Dayton Audio SS8-22: Low distortion magnetic circuit
At the heart of the SS8-22 is a large triple magnet, engineered using FEA and generating a symmetrical magnetic field. This allows the diaphragm to move identically forwards and backwards, minimising distortion even at the limits of excursion. Precision-machined plates with sculpted edges maximise magnetic flux transfer, while an aluminium short-circuit ring and a large magnetic cap linearise inductance throughout the entire stroke. The result is reduced distortion and constant, precise control of sound reproduction.
Dayton Audio SS8-22: Unfailing stability
To maintain linear cone movement and eliminate any risk of tilting, the SS8-22 uses a double spider suspension, spaced for greater stability. The connecting wires are stitched into the upper spider to improve mechanical reliability and prevent unwanted contact with the cone or suspension during heavy excursions. This design, combined with the precise control mentioned above, ensures smooth piston-like movement even when pushed to its limits.
Technical characteristics
| Specifications | |
|---|---|
| Product type | Speaker Driver Woofer / Subwoofer |
| Nominal diameter | Ø20.32cm (8") |
| Power handling | RMS: 500W Max: 1000W |
| Impedance | 4Ω |
| Sensitivity | 84.9dB 2.83V/1m |
| Frequency response | 20-500Hz |
| Voice coil diameter | Ø6.35cm (2.5") |
| Membrane material | Aluminium |
| Suspension material | Rubber |
| Basket material | Cast aluminium |
| Magnet material | Ferrite |
| Thiele-Small Parameters | |
|---|---|
| Resonant frequency (Fs) | 38Hz |
| DC Resistance (Re) | 4.4Ω |
| Voice coil inductance (Le) | 1.6mH |
| Mechanical quality coefficient (Qms) | 4.37 |
| Electromagnetic quality coefficient (Qes) | 0.5 |
| Total quality coefficient (Qts) | 0.45 |
| Compliance equivalent volume (Vas) | 1.343ft³ |
| Mechanical compliance of suspension (Cms) | 0.17mm/N |
| Force factor (BL) | 14.6T·m |
| Diaphragm mass inc. airload (Mms) | 101g |
| Linear excursion (Xmax) | 17mm |
| Surface area of cones (Sd) | 200cm² |
| Information regarding assembly | |
|---|---|
| Total external diameter | Ø21.4cm (8.43") |
| Cutting diameter of the baffle | Ø18.415cm (7.25") |
| Depth | Ø15.748cm (6.2") |
| General | |
|---|---|
| Weight | 9kg |
| Package | Sold by unit |
| Speaker Power (W RMS) | 500.0 |
| Speaker Type | Subwoofer |
| Impedance (Ω) | 4 |
| Loudspeaker diameter (mm) | 230.0 |
| Diaphragm type | Aluminium |
| Efficiency / Sensitivity (dB) | 84.9 |
| Max Linear Excursion (Xmax) (mm) | 17.0 |
| Lowest frequency (Hz) | 20 |
| Highest frequency (Hz) | 500 |
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