Woofer W 250 S with a 4 Ohm impedance made by Visaton. This 250 mm woofer features a recessed terminal block and a 38mm coil for high sound load. The W 250 S is equipped with a rubber suspension and a coated paper membrane.
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|Nominal impedance Z||4ohm|
|Outside diameter||283 mm|
|Mean sound pressure level||90dB|
|Coil diameter||38 mm|
|Resonance frequency fs||33 Hz|
|Electrical Q factor Qes||0.43|
|Mechanical Q factor Qms||2.01|
|Total Q factor Qts||0.35|
|Dynamically moved mass Mms||32 gr|
|Equivalent volume Vas||135 L|
|Frequency response||fu–5500 Hz|
|Le Inductance bobine (Le)||0.9 mH|
|DC resistance. (Re)||3.6 Ohms|
|Effective piston area Sd||346 cm²|
|Linear Excursion (Xmax)||+/−7 mm|
|Force factor (BxL)||8.9 Tm|
|Magnetic induction||1.0 T|
|Magnetic flux||835 µWb|
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