4" Paper Cone Woofer
FSB022540-0402
Features
4”, Steel Frame
1” PESVW Voice Coil, Aluminum Former
PULP Diaphragm and Coating Black Dust Cap
Ferrite Magnet Motor System
Long Excursion(±3.6mm)
Low Distortion (<3%)
Parameters
Size
4 Inch
Fs
80 Hz
Re
3.95 Ohms
Sensitivity
88 dB
Quality Factor
0.52 Qts
Rated Power
25 W
This 4 inch 4 ohm Woofer driver, with 1 inch voice coil copper wire, Aluminum former, damping glue coated PULP cone and rubber surround. The long-throw voice coil ensures linear high excursion. The Aluminum former are vented holes so as to reduce air compression effects. Additionally, coated paper cones come equipped with special-designed roll rubber surrounds can get smooth response curve.
Family
Range
| T-S Parameters | |
|---|---|
| Resonance frequency [fs] | 78.8 Hz |
| Mechanical Q factor [Qms] | 5.221 |
| Electrical Q factor [Qes] | 0.578 |
| Total Q factor [Qts] | 0.520 |
| Force factor [Bl] | 5.031 Tm |
| Mechanical resistance [Rms] | 0.709 kg/s |
| Moving mass [Mms] | 7.473 g |
| Compliance [Cms] | 0.546 mm/N |
| Effective diaph. diameter [D] | 85 mm |
| Effective piston area [Sd] | 56.75 cm² |
| Equivalent volume [Vas] | 2.4877 l |
| Sensitivity (2.83V/1m) | 88 dB |
| Ratio Bl/√Re | 2.52 N/√W |
| Ratio fs/Qts | 151.53 Hz |
| Electrical Data | |
|---|---|
| Nominal impedance [Zn] | 4 Ω |
| Minimum impedance [Zmin] | 4.2 Ω |
| Maximum impedance [Zo] | 27.26 Ω |
| DC resistance [Re] | 3.95 Ω |
| Voice coil inductance [Le] | 0.29 mH |
| Power Handling | |
|---|---|
| 100h RMS noise test (IEC 18.4) | 25 W |
| Long-term max power (IEC 18.2) | - W |
| Voice Coil & Magnet Data | |
|---|---|
| Voice coil diameter | 25.4 mm |
| Voice coil height | 13.2 mm |
| Voice coil layers | 2 |
| Height of gap | 6 mm |
| Linear excursion | ± 3.6 mm |
| Max mech. excursion | ± 9.5 mm |
| Unit weight | 0.915 kg |
