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Air core coils:

coils with a ferromagnetic core:

Audaphon coils

Overview coils
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Audaphon coils

All listed coils are made of copper lacquer wire with a purity of > 99.995%. The wire ends are tinned and labelled. Inductance is measured at 25 degrees Celsius; tolerance is +/- 3%. L denotes inductance, R the DC resistance, D the diameter, Le the length, W the width, H the height.

Air coils (i.e. coils without a ferro-magnetic core) are absolutely distortion-free, which on the face of it makes them ideal for all audio applications. The trouble is, their electrical resistance increases with their inductance. There are two solutions to this problem: One can either use very thick windings (this is why our standard range includes windings with wire up to 3 mm in diameter) or coils with cores. Lower cost and smaller size are also common reasons for choosing cored coils.

air core coils made of wire 0.7 mm in diameter

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
bl-L7-010	0.10	0.23	0.70	31 W	25 x 10	EUR 3,90 excl. VAT: € 3.28 / $ 3.97
bl-L7-012	0.12	0.25	0.70	42 W	36 x 10	EUR 4,00 excl. VAT: € 3.36 / $ 4.07
bl-L7-015	0.15	0.28	0.70	39 W	36 x 10	EUR 4,10 excl. VAT: € 3.45 / $ 4.17
bl-L7-018	0.18	0.31	0.70	38 W	36 x 10	EUR 4,20 excl. VAT: € 3.53 / $ 4.27
bl-L7-022	0.22	0.34	0.70	37 W	36 x 10	EUR 4,30 excl. VAT: € 3.61 / $ 4.37
bl-L7-027	0.27	0.39	0.70	34 W	36 x 10	EUR 4,40 excl. VAT: € 3.70 / $ 4.47
bl-L7-033	0.33	0.43	0.70	33 W	36 x 10	EUR 4,50 excl. VAT: € 3.78 / $ 4.58
bl-L7-039	0.39	0.51	0.70	29 W	36 x 10	EUR 4,60 excl. VAT: € 3.87 / $ 4.68
bl-L7-047	0.47	0.58	0.70	21 W	30 x 20	EUR 4,70 excl. VAT: € 3.95 / $ 4.78
bl-L7-056	0.56	0.64	0.70	20 W	30 x 20	EUR 4,80 excl. VAT: € 4.03 / $ 4.88
bl-L7-068	0.68	0.71	0.70	20 W	30 x 20	EUR 5,00 excl. VAT: € 4.20 / $ 5.08

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver.
The values are valid for free air convection and 20°C. For 4 Ohm speakers this value has to be halved.

air core coils made of wire 1.0 mm in diameter

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
bl-L10-010	0.10	0.14	1.00	82 W	30 x 20	EUR 4,40 excl. VAT: € 3.70 / $ 4.47
bl-L10-015	0.15	0.17	1.00	82 W	30 x 20	EUR 4,70 excl. VAT: € 3.95 / $ 4.78
bl-L10-022	0.22	0.21	1.00	83 W	40 x 20	EUR 5,00 excl. VAT: € 4.20 / $ 5.08
bl-L10-033	0.33	0.26	1.00	77 W	40 x 20	EUR 5,50 excl. VAT: € 4.62 / $ 5.59
bl-L10-039	0.39	0.29	1.00	71 W	40 x 20	EUR 5,80 excl. VAT: € 4.87 / $ 5.90
bl-L10-047	0.47	0.32	1.00	67 W	40 x 20	EUR 6,10 excl. VAT: € 5.13 / $ 6.20
bl-L10-068	0.68	0.39	1.00	65 W	58 x 18	EUR 6,70 excl. VAT: € 5.63 / $ 6.81
bl-L10-082	0.82	0.44	1.00	62 W	58 x 18	EUR 7,00 excl. VAT: € 5.88 / $ 7.12
bl-L10-100	1.0	0.49	1.00	61 W	58 x 18	EUR 7,60 excl. VAT: € 6.39 / $ 7.73
bl-L10-120	1.2	0.54	1.00	63 W	58 x 18	EUR 8,10 excl. VAT: € 6.81 / $ 8.24
bl-L10-150	1.5	0.63	1.00	59 W	58 x 18	EUR 8,70 excl. VAT: € 7.31 / $ 8.85
bl-L10-180	1.8	0.70	1.00	56 W	58 x 18	EUR 9,20 excl. VAT: € 7.73 / $ 9.35
bl-L10-220	2.2	0.83	1.00	51 W	58 x 18	EUR 10,10 excl. VAT: € 8.49 / $ 10.27
bl-L10-270	2.7	0.93	1.00	46 W	58 x 30	EUR 10,50 excl. VAT: € 8.82 / $ 10.68
bl-L10-330	3.3	1.1	1.00	46 W	58 x 30	EUR 12,50 excl. VAT: € 10.50 / $ 12.71

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver.
The values are valid for free air convection and 20°C. For 4 Ohm speakers this value has to be halved.

air core coils made of wire 1.3 mm in diameter

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
bl-L13-010	0.10	0.10	1.32	194 W	38 x 22	EUR 5,50 excl. VAT: € 4.62 / $ 5.59
bl-L13-068	0.68	0.22	1.32	158 W	58 x 19	EUR 10,90 excl. VAT: € 9.16 / $ 11.08
bl-L13-082	0.82	0.28	1.32	165 W	70 x 29	EUR 11,90 excl. VAT: € 10.00 / $ 12.10
bl-L13-100	1.0	0.32	1.32	153 W	70 x 29	EUR 12,90 excl. VAT: € 10.84 / $ 13.12
bl-L13-120	1.2	0.35	1.32	150 W	70 x 29	EUR 14,00 excl. VAT: € 11.76 / $ 14.24
bl-L13-150	1.5	0.40	1.32	140 W	70 x 29	EUR 15,00 excl. VAT: € 12.61 / $ 15.25
bl-L13-180	1.8	0.45	1.32	132 W	70 x 29	EUR 16,00 excl. VAT: € 13.45 / $ 16.27
bl-L13-220	2.2	0.48	1.32	131 W	70 x 29	EUR 18,00 excl. VAT: € 15.13 / $ 18.30

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver.
The values are valid for free air convection and 20°C. For 4 Ohm speakers this value has to be halved.

air core coils made of wire 1.4 mm in diameter

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
bl-L14-115	1.2	0.32	1.4	130 W	58 x 30	EUR 14,50 excl. VAT: € 12.18 / $ 14.74

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver.
The values are valid for free air convection and 20°C. For 4 Ohm speakers this value has to be halved.

ferrit core coils

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
bl-m12-100	1.0	0.13	1.18	180 W	40 x 27	EUR 9,60 excl. VAT: € 8.07 / $ 9.76
bl-m12-120	1.2	0.15	1.12	176 W	40 x 27	EUR 11,00 excl. VAT: € 9.24 / $ 11.18
bl-m12-150	1.5	0.16	1.18	193 W	45 x 36	EUR 11,20 excl. VAT: € 9.41 / $ 11.39
bl-m12-180	1.8	0.18	1.18	183 W	45 x 36	EUR 11,90 excl. VAT: € 10.00 / $ 12.10
bl-m12-220	2.2	0.20	1.18	175 W	45 x 36	EUR 12,90 excl. VAT: € 10.84 / $ 13.12
bl-m12-330	3.3	0.22	1.12	168 W	45 x 36	EUR 15,10 excl. VAT: € 12.69 / $ 15.35
bl-m14-390	3.9	0.22	1.4	189 W	56 x 40	EUR 24,00 excl. VAT: € 20.17 / $ 24.40
bl-m14-470	4.7	0.24	1.4	198 W	56 x 40	EUR 25,00 excl. VAT: € 21.01 / $ 25.42

(*) Pmax 8 Ohm is the maximum power that this coil is able to deliver to the bass driver.
The values are valid for free air convection and 20°C. For 4 Ohm speakers this value has to be halved.