Air core coils: L7 L10 L13 coils with a ferromagnetic core: M

 

Audaphon 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 3,85
bl-L7-012 0.12 0.25 0.70 42 W 36 x 10 EUR 3,95
bl-L7-015 0.15 0.28 0.70 39 W 36 x 10 EUR 4,05
bl-L7-018 0.18 0.31 0.70 38 W 36 x 10 EUR 4,15
bl-L7-022 0.22 0.34 0.70 37 W 36 x 10 EUR 4,25
bl-L7-027 0.27 0.39 0.70 34 W 36 x 10 EUR 4,35
bl-L7-033 0.33 0.43 0.70 33 W 36 x 10 EUR 4,45
bl-L7-039 0.39 0.51 0.70 29 W 36 x 10 EUR 4,55
bl-L7-047 0.47 0.58 0.70 21 W 30 x 20 EUR 4,65
bl-L7-056 0.56 0.64 0.70 20 W 30 x 20 EUR 4,75
bl-L7-068 0.68 0.71 0.70 20 W 30 x 20 EUR 4,95
*) 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.
zur Übersicht

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 4,35
bl-L10-015 0.15 0.17 1.00 82 W 30 x 20 EUR 4,65
bl-L10-022 0.22 0.21 1.00 83 W 40 x 20 EUR 4,95
bl-L10-033 0.33 0.26 1.00 77 W 40 x 20 EUR 5,45
bl-L10-039 0.39 0.29 1.00 71 W 40 x 20 EUR 5,75
bl-L10-047 0.47 0.32 1.00 67 W 40 x 20 EUR 6,05
bl-L10-068 0.68 0.39 1.00 65 W 58 x 18 EUR 6,65
bl-L10-082 0.82 0.44 1.00 62 W 58 x 18 EUR 6,95
bl-L10-100 1.0 0.49 1.00 61 W 58 x 18 EUR 7,55
bl-L10-120 1.2 0.54 1.00 63 W 58 x 18 EUR 8,05
bl-L10-150 1.5 0.63 1.00 59 W 58 x 18 EUR 8,65
bl-L10-180 1.8 0.70 1.00 56 W 58 x 18 EUR 9,15
bl-L10-220 2.2 0.83 1.00 51 W 58 x 18 EUR 10,10
bl-L10-270 2.7 0.93 1.00 46 W 58 x 30 EUR 10,50
bl-L10-330 3.3 1.1 1.00 46 W 58 x 30 EUR 12,40
*) 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.
zur Übersicht

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 5,45
bl-L13-068 0.68 0.22 1.32 158 W 58 x 19 EUR 10,90
bl-L13-082 0.82 0.28 1.32 165 W 70 x 29 EUR 11,90
bl-L13-100 1.0 0.32 1.32 153 W 70 x 29 EUR 12,90
bl-L13-120 1.2 0.35 1.32 150 W 70 x 29 EUR 13,90
bl-L13-150 1.5 0.40 1.32 140 W 70 x 29 EUR 14,90
bl-L13-180 1.8 0.45 1.32 132 W 70 x 29 EUR 15,90
bl-L13-220 2.2 0.48 1.32 131 W 70 x 29 EUR 17,90
*) 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.
zur Übersicht

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 14,40
*) 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.
zur Übersicht

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
bl-m12-120 1.2 0.15 1.12 176 W 40 x 27 EUR 11,00
bl-m12-150 1.5 0.16 1.18 193 W 45 x 36 EUR 11,20
bl-m12-180 1.8 0.18 1.18 183 W 45 x 36 EUR 11,90
bl-m12-220 2.2 0.20 1.18 175 W 45 x 36 EUR 12,90
bl-m12-330 3.3 0.22 1.12 168 W 45 x 36 EUR 15,00
bl-m14-390 3.9 0.22 1.4 189 W 56 x 40 EUR 23,90
bl-m14-470 4.7 0.24 1.4 198 W 56 x 40 EUR 24,90
*) 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.
zur Übersicht