MUNDORF Air coils, OFC wire

AirCore wire coils

Air cored wire coils are the most commonly used coils in the loudspeaker industry based on some interesting factors: most basic design, no core distortion nor losses, etc. As always, these benefits come with some disadvantages or as our famous footballer Johan Cruyff once said: "elk voordeel hep se nadeel". There is relatively much copper required for a certain value and so the coil is also relatively large, both compared to cored types.

Mcoil L-series air cored coils are made from massive copper round wire 0,5 - 2*6mm and are especially developed for high quality loudspeakers, which focus on achieving an utmost natural, detailed and acoustically balanced music performance:

The acoustical properties of the L series can yet be significantly enhanced by applying Baked Wire Treatment and found as the BL-types with wires <2,0mm. In this process the sticky OFC wire is wound on the core and then heated up for a short time. After cooling down the result is a massive coil without microphonic effects:


On air coils using wires with a larger than 2,0mm cross-section (VL-series) this baked wire principle works insufficient, so improvement is done by a more time consuming vacuum impregnation process where winding after winding a sticky laquer is added. The coil is then placed under a stolp, where than about all the air is sucked out. As a result the sticky laquer is filling up all the air space within the coil, resulting in a most massive coil, preventing any microphonic effects:

The LL-types use a Heptastrand multiple wire structure with a way larger surface area, resulting in a way smaller "Skin-effect" behavior and therefore most suited for mid/high frequency crossovers It is also baked for optimal results:


       Mostly all values in stock

       Mostly all values in stock

       Mostly all values in stock

       Mostly all values in stock

       Mostly all values in stock


       Mostly all values in stock

       Mostly all values in stock

       Mostly all values in stock

       Mostly all values in stock

       Production on demand, shipping in 3-4 weeks.


       Production on demand, shipping in 3-4 weeks.

       Production on demand, shipping in 3-4 weeks.

       Production on demand, shipping in 3-4 weeks.


       Some values in stock, others production on demand, shipping in 3-4 weeks.


ELTIM note: The MUNDORF baked and impregnated processes are cheap copied a lot, where only the visible part of the coil is simply painted to give it a similar look! Of course the results (and price) will be a bit different......


All MUNDORF coils are developed, carefully wound on precise machines
and checked/processed by hand in the MUNDORF factory in Cologne, Germany.
All Mundorf coils are made with 99,997% oxygen free copper (OFC).
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