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This Dayton Audio PCS115-8 woofer, featuring a polypropylene (PP) cone, has a diameter of 10.16 cm (4"). It features a rubber surround and an inverted basket, enabling it to reproduce bass frequencies in small speakers with ease.

Technical characteristics
| Specifications | |
|---|---|
| Product type | Woofer |
| Nominal diameter | Ø10.16cm (4") |
| Power | RMS : 20W Max : 40W |
| Impedance | 8Ω |
| Frequency response | 60Hz-6kHz |
| Sensitivity | 82.5dB 2.83V/1m |
| Voice coil diameter | 2.54cm (1") |
| Thiele / Small Parameters | |
|---|---|
| Resonent frequency (Fs) | 87Hz |
| DC Resistance (Re) | 6.8Ω |
| Voice coil inductance (Le) | 0.55mH |
| Mechanical Q (Qms) | 2.69 |
| Electromagnetic Q (Qes) | 1.22 |
| Total Q (Qts) | 0.84 |
| Compliance equivalent volume (Vas) | 0.0625ft³ |
| Mechanical compliance of suspension (Cms) | 0.48mm/N |
| BL Product (BL) | 4.6T·m |
| Diaphragm mass inc. airload (Mms) | 7g |
| Max linear excursion (Xmax) | 3.5mm |
| Surface area of cone (Sd) | 51.5cm² |
| Material | |
|---|---|
| Cone material | Polypropylene (PP) |
| Surround material | Rubber |
| Voice coil former | Aluminum |
| Frame material | Steel |
| Magnet material | Ferrite |
| Mounting information | |
|---|---|
| Overall outside diameter | 11.43cm (4.5") |
| Baffle cutout diameter | 9.4cm (3.7") |
| Depth | 5,71cm (2.25") |
| Number of mounting holes | 4 |
| Optimum cabinet size | |
|---|---|
| Sealed volume | 0.18ft³ |
| Sealed F3 | 87Hz |
| Vented volume | 0.27ft³ |
| Vented F3 | 40Hz |
| General | |
|---|---|
| Package | Sold by unit |
| Speaker Power (W RMS) | 20.0 |
| Speaker Type | Woofer |
| Impedance (Ω) | 8 |
| Loudspeaker diameter (mm) | 101.6 |
| Diaphragm type | Polypropylene |
| Efficiency / Sensitivity (dB) | 82.5 |
| Max Linear Excursion (Xmax) (mm) | 3.5 |
| Lowest frequency (Hz) | 60 |
| Highest frequency (Hz) | 6000 |