4″ SB12PAC25-4 / Aluminum
Features
- Vented reinforced plastic chassis
- Anodised aluminium cone
- Low damping rubber surround
- Large vented motor system
- Long stroke linear suspension
- Light weight CCAW voice coil
- Non-conducting fibreglass coil former
- Non-resonant long life lead wires
Additional information
| Nominal Impedance | 4 Ω |
|---|---|
| DC resistance | Re 3.1 Ω |
| Voice coil inductance | Le 0.25 mH |
| Effective piston area | Sd 50 cm2 |
| Voice coil diameter | 25.4 mm |
| Voice coil height | 15 mm |
| Air gap height | 5 mm |
| Linear coil travel (p-p) | 10 mm |
| Magnetic flux density | 1.03 T |
| Magnet weight | 0.40 kg |
| Net Weight | 0.86 kg |
| Free air resonance | Fs 52.5 Hz |
| Sensitivity | (2.83 V / 1 m) 87 dB |
| Mechanical Q-factor | Qms 5.0 |
| Electrical Q-factor | Qes 0.33 |
| Total Q-factor | Qts 0.31 |
| Moving mass incl. air | Mms 6.1 g |
| Force factor | Bl 4.35 Tm |
| Equivalent volume | VAS 5.3 liters |
| Compliance | Cms 1.50 mm/N |
| Mechanical loss | Rms 0.4 kg/s |
| Rated power handling | * 30 W |
| Note | * IEC 268-5, T/S parameters measured on drive units that are broken in. |
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