Coil Calculator

Coil Calculator		Resistance with 2 decimals Please enter decimal separator as "."
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 Please enter decimal separator as "."
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 L_ges = (L1 * L2) / (L1 + L2)

Coils in parallel				Please enter decimal separator as "."
L1 =		mH	and	L2 =		mH		L_ges =		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		L_ges =		mH
Copyright © Iris Strassacker, 2002. All rights reserved - Warranty excluded

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