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All listed coils are made of copper lacquer wire with a purity of > 99.995%. The coil body is made of ABS. The wire ends are tinned and labelled. Inductance is measured at 25 Grad Celsius; tolerance is +/- 5%. L denotes inductance, R the DC resistance, D the diameter, Le the length, W the width and H the height.

Please note: The power values Pmax in the following tables were determined at 25 degrees Celsius ambient temperature, at 50 Hz and free convection. They are just a guideline and - since we are not the manufacturers - cannot be guaranteed by us.
The coils are from Intertechnik; in the past we delivered our kits with these coils. Unfortunately we have delivery problems, we propose a replacement:

Air core coils, Type 1

low distortion air core coil with 0.71 mm wire Intertechnik Luftspule 0,7mm

other values, we sell from
Mundorf

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
I-0200	0.10	0.26	0.71	50 W	32 x 26	EUR 1,90 excl. VAT: € 1.60 / $ 1.74
I-0210	0.12	0.28	0.71	45 W	32 x 26	- not available
I-0215	0.15	0.32	0.71	42 W	32 x 26	EUR 2,10 excl. VAT: € 1.76 / $ 1.92
I-0220 repl	0.18	0.35	0.71	40 W	32 x 25(!)	EUR 2,20 excl. VAT: € 1.85 / $ 2.02
I-0225	0.22	0.39	0.71	35 W	32 x 26	EUR 2,20 excl. VAT: € 1.85 / $ 2.02
I-0230 repl	0.27	0.43	0.71	32 W	32 x 25(!)	EUR 2,30 excl. VAT: € 1.93 / $ 2.11
I-0235	0.33	0.48	0.71	30 W	32 x 26	EUR 2,50 excl. VAT: € 2.10 / $ 2.29
I-0240	0.39	0.53	0.71	27 W	32 x 26	EUR 2,60 excl. VAT: € 2.18 / $ 2.38
I-0245	0.47	0.57	0.71	26 W	32 x 26	EUR 2,80 excl. VAT: € 2.35 / $ 2.56

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

higher value coils are available by Mundorf:

(!) here we deliver as replacement the coil seen on the left below the IT coil.

Air core coils, Type 3

extremely low distortion air core coil with 1.4 mm wire

Intertechnik Luftspule 1,4mm

other values, we sell from
Mundorf

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
I-0046	0.10	0.08	1.4	540 W	55 x 30	EUR 5,50 excl. VAT: € 4.62 / $ 5.04
I-0050	0.22	0.13	1.4	330 W	55 x 30	- not available
I-0054	0.47	0.19	1.4	240 W	55 x 30	EUR 9,10 excl. VAT: € 7.65 / $ 8.34
I-0055	0.56	0.22	1.4	220 W	62 x 41	- not available
I-0064	2.20	0.46	1.4	145 W	78 x 30	- not available
I-0067	3.30	0.60	1.4	125 W	92 x 39	EUR 24,80 excl. VAT: € 20.84 / $ 22.72
I-0069	3.90	0.67	1.4	120 W	92 x 39	EUR 27,00 excl. VAT: € 22.69 / $ 24.73

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

Air core coils, Type 4

extremely low distortion air core coil with 2.0 mm wire
Intertechnik Luftspule 2mm

other values, we sell from
Mundorf

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
I-0906	0.18	0.06	2.0	900W	62 x 41	EUR 11,40 excl. VAT: € 9.58 / $ 10.44
I-0910	0.27	0.08	2.0	820W	62 x 41	- not available
I-0918	0.56	0.12	2.0	630 W	92 x 39	- not available
I-0073	2.20	0.30	2.0	420 W	120 x 80	- not available
I-0075	2.70	0.33	2.0	400 W	120 x 80	- not available

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

For larger wire diameter please refer to Mundorf Coils

True Silver Coil
(TSC inductor)

silver-coated copper wire with 0.8 mm diameter
Intertechnik TSC

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
I-1501328	0.91	0.73	0.80	35	44 x 30	EUR 14,70 excl. VAT: € 12.35 / $ 13.46

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

Baked varnish
air core coils

Intertechnik Backlackspule (Air-Therm-Spule)

The turns of this coil are insulated with thermoplastic and then backed. This type of coil is particularly solid and low in vibration and is, therefore, suited for even the most demanding applications at an excellent price / performance ratio!

Baked varnish see at Mundorf.

HQ T-core coils

The design of this coil type is similar to the air core coil, except that it contains a soft, T-shaped ferrite core. The vertical bar is resting partly inside the coil while the horizontal bar is covering the labelled side. The magnetisation curve is linear at small to medium volumes, meaning that distortion is low.

Product ID	L/mH	R/Ohm	wire D/mm	dimensions (DxH/mm)	Price
I-0292	3.90	0.42	1.12	56.0 x 35.0	EUR 17,00 excl. VAT: € 14.29 / $ 15.57
I-0296	8.20	0.85	0.95	56.0 x 35.0	EUR 17,50 excl. VAT: € 14.71 / $ 16.03
I-0299	15.0	1.40	0.85	56.0 x 35.0	- not available
I-1500134	27.0	1.76	0.95	62.0 x 47.0	EUR 20,70 excl. VAT: € 17.39 / $ 18.96

Ferrite core coils

The design of this coil type is similar to the air core coil, except that it contains a soft, ferrite core. The magnetisation curve is linear at small to medium volumes. This coil type is suitable to confined conditions where large air core coil won't have enough space. Intertechnik Rollenkernspule

Please note the extremely low internal resistance of the HQ 56 coils (picture above). They are especially suited for subwoofers.

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
HQ 43
I-0183	2.7	0.33	0.95	-	43.0 x 45	EUR 10,00 excl. VAT: € 8.40 / $ 9.16
I-0197	8.2	0.65	0.95	-	43.0 x 45	EUR 13,10 excl. VAT: € 11.01 / $ 12.00
I-0198	10.0	0.93	0.85	-	43.0 x 45	EUR 12,60 excl. VAT: € 10.59 / $ 11.54
HQ 58

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

COROBAR™ coils (Corobar is registered trademark of I.T. Electronic GmbH)

The design of this coil type is similar to the air core coil, except that it contains a COROBAR core. Since distortion is very low this coil is well suited for Hi-fi.

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
I-0954	10.0	0.87	1.4	65 W	92 x 39	EUR 42,70 excl. VAT: € 35.88 / $ 39.11

i-Punkt© coils

A coil with extreme power handling, consisting of granular aligned silicon sheet iron with high saturation current.

Product ID	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (LexW/mm)	Price
I-1000	1.2	0.13	1.32	500 W	130 x 46	EUR 23,60 excl. VAT: € 19.83 / $ 21.62
I-1001	1.5	0.14	1.32	500 W	130 x 46	- not available
I-1002	1.8	0.16	1.32	490 W	130 x 46	- not available
I-1003	2.2	0.17	1.32	480 W	130 x 46	EUR 24,90 excl. VAT: € 20.92 / $ 22.81
I-1004	2.7	0.19	1.32	430 W	130 x 46	EUR 24,90 excl. VAT: € 20.92 / $ 22.81
I-1005	3.3	0.21	1.32	380 W	130 x 46	- not available
I-1007	4.7	0.26	1.32	310 W	130 x 46	- not available
I-1015	10	0.56	1.12	150 W	130 x 46	- not available

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

reasonably priced ferrite core coils

Reasonably priced coils, especially suited for equalisation circuits.

Up to 5.6 mH all coils contain a HQ soft ferrite, tube-shaped core. From 6.8 mH upwards the coils contain a COROBAR core (without picture).

Product ID	L/mH	R/Ohm	wire D/mm	dimensions (DxH/mm)	Price
I-0974	8.20	2.27	0.60	44 x 36	- not available
I-0976	10.0	3.48	0.50	44 x 36	- not available

Transformer core coils

for high power application in either circular (TO1000) or Intertechnik Torobarspule

square version (FE96 andFE130). Intertechnik Trafospule

Product ID Type	L/mH	R/Ohm	wire D/mm	Pmax 8Ohm	dimensions (DxH/mm)	Price
TO1000
I-592	10	0.27	-	250 W	87 x 41	- not available

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver (at 4 Ohm this value has be halved).

other values: Mundorf Feron transformer core coils

to other coils:

Mundorf, der Spezialist für Spulen und Kondensatoren large Mundorf air core coils.

Mundorf, der Spezialist für Spulen und Kondensatoren CFC coils (copper foil capacitor)
with excellent three-dimensionality and attention to detail; they belong to the group of exceptionally neutral capacitors.

Mundorf, der Spezialist für Spulen und Kondensatoren Aronit core coils

Mundorf, der Spezialist für Spulen und Kondensatoren Feron i core coils

Mundorf, der Spezialist für Spulen und Kondensatoren Feron transformer core coils

Mundorf, der Spezialist für Spulen und Kondensatoren Zero Ohm Coils

Further coils upon request

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