Coil Calculator Resistance with 2 decimals
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Frequency in Hz: Inductance in mH: Impedance in Ohm:
further hint: Please choose a coil with adequate load-carrying ability.
Copyright © Iris Strassacker, 2002. All rights reserved - Warranty excluded

 
Air core coil power estimator Maximum power drain for coils
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Coil data, copper coil dimensions   Bass driver
Length in cm: Diameter in cm: Coil resistance in Ohm: Impedance in Ohm:
 
The coil, placed before a bass driver, is suitable for a power of up to: Watt
Important hints:
Dimensions refer to that part that gets as hot as the copper coil itself and, therefore, dissipates heat optimally. All values indicated are just a guidance and cannot be guaranteed. They were, however, results of around 100 long-term measurements over 24 hours each. The values are valid for coils with free air convection. If convection is perfect and temperature is 20°C the coil is able to transmit up to 50% more.

These values are only valid for core coils under the condition that they don't generate any additional heat through magnetisation loss (like with Corobar coils).
Copyright © Iris Strassacker, 2002. All rights reserved - Warranty excluded

If two coils L1 and L2 are in parallel, then Lges = (L1 * L2) / (L1 + L2)
Coils in parallel Please enter decimal separator as "."
L1 = mH and L2 = mH   Lges = mH
Copyright © Iris Strassacker, 2002. All rights reserved - Warranty excluded

If two coils L1 and L2 are in series, then their inductance is added up.
Coils in series Please enter decimal separator as "."
L1 = mH and L2 = mH   Lges = mH
Copyright © Iris Strassacker, 2002. All rights reserved - Warranty excluded

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