C-Coil – Toroidal Core

c-coil-450 (1)Please note!

The C-Coil cannot be measured using a universal LC meter.
Due to the characteristics of the core and winding method, it is important to use a professional RLC meter or CLIO.
We measure all C-Coils before shipping them, using a professional RCL meter / CLIO at AC 1 V 1 kHz.

Due to the extremely low resistance, the C-Coil can not be measured on its own.
Please contact us, if you wish to do your own measurements of inductance for C-Coils and we will guide you to the proper measuring method.

The C-Coil is not recommended for any other use than on crossovers for passive loudspeakers.

This is due the the toroidal core’s strong output of electromagnetism.

These coils are not suitable for installation in amplifiers or active systems.

We do not recommend use of C-Coils on crossovers with an XO point above 1.20 kHz, due to the core’s distortion factor.

The C-Coil is wound around a toroidal sandwich core, and it has extremely low resistance and can shift a large amount of power without getting over heated.

The core is formed like a donut with a round cross section, and it is wound from one long piece of laminated steel tape.

The surface of the core is epoxy coated to secure against short circuit even at a very high load.

If the stated maximum wattage is not exeeded the core will never saturate.

The C-Coil is designed for the bass section of crossovers and for passive Sub-Woofers, available in different core and wire sizes.


Download product presentation with tech info here:

Download PDF

(Right click + “save link as”, to save file)

Download list of values here:

Download PDF

(Right click + “save link as”, to save file)

Please note!
Sorted by mH

– Use Zoom funtion in PDF viewer to re-size the list –

Download information about copper wire & foil here:

Download PDF

(Right click + “save link as”, to save file)