Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Mundorf Feron core coil (MCoil Laminated Core Coils)

Mundorf, der Spezialist für Spulen und Kondensatoren MCoil Laminated Core Coils combine both the typical low basic output distortions and the low internal resistance of Feron core coils with the enhanced dynamic in music performance of copper wire featuring our Baked Wire Treatment.

They are highly suitable to be used for high quality mid frequency crossover within subwoofer applications. They also offer an excellent value for money ratio as well as the come at compact dimensions.

The BS series which was entirely re-developed in 2010, has replaced the well-known i and Bi series.

Technical specifications:
Tolerance: max. 3%, typical 1.5%
Copper 99.99% pure

Core material: FERON
Grain-oriented silicon iron 0.35 mm


Please note: The power values Pmax in the following tables were determined at 20 degrees Celsius ambient temperature and free convection. They are just a guideline and - since we are not the manufacturers - cannot be guaranteed by us.
 
Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Feron core coil (wire with 0.71 mm diameter)

Product ID L/mH R/Ohm Wire-
D/mm
Pmax*)
8Ohm
Coil Size
(LxD/mm)
Price
M-bs71-33 3.3 0.57 0.71 58 W 66 x 23 EUR 24,15 excl. VAT: € 20.29 / $ 18.97
M-bs71-39 3.9 0.60 0.71 55 W 66 x 23 EUR 25,05 excl. VAT: € 21.05 / $ 19.67
M-bs71-47 4.7 0.70 0.71 53 W 66 x 23 EUR 26,05 excl. VAT: € 21.89 / $ 20.46
M-bs71-56 5.6 0.82 0.71 49 W 66 x 24 EUR 27,05 excl. VAT: € 22.73 / $ 21.24
M-bs71-68 6.8 0.94 0.71 45 W 66 x 24 EUR 28,05 excl. VAT: € 23.57 / $ 22.03
M-bs71-82 8.2 1.1 0.71 41 W 66 x 24 EUR 29,05 excl. VAT: € 24.41 / $ 22.81
M-bs71-100 10.0 1.2 0.71 37 W 84 x 26 EUR 30,95 excl. VAT: € 26.01 / $ 24.31
*) 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.
Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Feron core coil (wire with 1.0 mm diameter)

Product ID L/mH R/Ohm Wire-
D/mm
Pmax*)
8Ohm
Coil Size
(LxD/mm)
Price
M-bs100-10 1.0 0.17 1.00 229 W 66 x 19 EUR 24,15 excl. VAT: € 20.29 / $ 18.97
M-bs100-12 1.2 0.19 1.00 208 W 66 x 21 EUR 24,75 excl. VAT: € 20.80 / $ 19.44
M-bs100-15 1.5 0.21 1.00 191 W 66 x 21 EUR 25,15 excl. VAT: € 21.13 / $ 19.75
M-bs100-18 1.8 0.24 1.00 178 W 66 x 23 EUR 25,65 excl. VAT: € 21.55 / $ 20.14
M-bs100-20 2.0 0.26 1.00 166 W 66 x 23 EUR 26,05 excl. VAT: € 21.89 / $ 20.46
M-bs100-22 2.2 0.27 1.00 161 W 66 x 23 EUR 26,65 excl. VAT: € 22.39 / $ 20.93
M-bs100-27 2.7 0.30 1.00 142 W 66 x 23 EUR 27,05 excl. VAT: € 22.73 / $ 21.24
M-bs100-30 3.0 0.33 1.00 134 W 66 x 25 EUR 27,65 excl. VAT: € 23.24 / $ 21.72
M-bs100-33 3.3 0.36 1.00 128 W 84 x 27 EUR 28,05 excl. VAT: € 23.57 / $ 22.03
M-bs100-39 3.9 0.40 1.00 120 W 84 x 27 EUR 28,55 excl. VAT: € 23.99 / $ 22.42
M-bs100-47 4.7 0.46 1.00 100 W 84 x 27 EUR 28,95 excl. VAT: € 24.33 / $ 22.74
M-bs100-56 5.6 0.51 1.00 95 W 84 x 27 EUR 29,95 excl. VAT: € 25.17 / $ 23.52
M-bs100-68 6.8 0.56 1.00 87 W 84 x 29 EUR 30,95 excl. VAT: € 26.01 / $ 24.31
M-bs100-82 8.2 0.62 1.00 78 W 84 x 29 EUR 31,95 excl. VAT: € 26.85 / $ 25.09
M-bs100-100 10.0 0.69 1.00 79 W 96 x 29 EUR 32,85 excl. VAT: € 27.61 / $ 25.80
M-bs100-120 12.0 0.76 1.00 78 W 96 x 31 EUR 33,85 excl. VAT: € 28.45 / $ 26.58
M-bs100-150 15.0 0.86 1.00 75 W 96 x 31 EUR 34,85 excl. VAT: € 29.29 / $ 27.37
*) 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.
Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Feron core coil (wire with 1.25 mm diameter)

Product ID L/mH R/Ohm Wire-
D/mm
Pmax*)
8Ohm
Coil Size
(LxD/mm)
Price
M-bs125-47 4.7 0.30 1.25 180 W 96 x 32 EUR 36,75 excl. VAT: € 30.88 / $ 28.86
M-bs125-56 5.6 0.33 1.25 165 W 96 x 32 EUR 37,75 excl. VAT: € 31.72 / $ 29.65
M-bs125-68 6.8 0.37 1.25 140 W 96 x 34 EUR 38,75 excl. VAT: € 32.56 / $ 30.43
M-bs125-82 8.2 0.41 1.25 125 W 96 x 34 EUR 39,65 excl. VAT: € 33.32 / $ 31.14
M-bs125-100 10.0 0.46 1.25 128 W 106 x 34 EUR 40,65 excl. VAT: € 34.16 / $ 31.92
M-bs125-120 12.0 0.51 1.25 118 W 106 x 34 EUR 41,65 excl. VAT: € 35.00 / $ 32.71
M-bs125-150 15.0 0.59 1.25 101 W 106 x 36 EUR 42,55 excl. VAT: € 35.76 / $ 33.42
M-bs125-180 18.0 0.66 1.25 90 W 106 x 36 EUR 43,55 excl. VAT: € 36.60 / $ 34.20
M-bs125-220 22.0 0.75 1.25 80 W 106 x 38 EUR 44,55 excl. VAT: € 37.44 / $ 34.99
*) 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.
Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Feron core coil (wire with 1.4 mm diameter)

Product ID L/mH R/Ohm Wire-
D/mm
Pmax*)
8Ohm
Coil Size
(LxD/mm)
Price
M-bs140-10 1.0 0.09 1.4 480 W 84 x 27 EUR 29,55 excl. VAT: € 24.83 / $ 23.21
M-bs140-12 1.2 0.10 1.4 440 W 84 x 27 EUR 29,95 excl. VAT: € 25.17 / $ 23.52
M-bs140-15 1.5 0.12 1.4 360 W 84 x 27 EUR 30,55 excl. VAT: € 25.67 / $ 23.99
M-bs140-18 1.8 0.14 1.4 315 W 84 x 28 EUR 30,95 excl. VAT: € 26.01 / $ 24.31
M-bs140-20 2.0 0.15 1.4 280 W 84 x 28 EUR 31,95 excl. VAT: € 26.85 / $ 25.09
M-bs140-22 2.2 0.16 1.4 310 W 96 x 28 EUR 32,85 excl. VAT: € 27.61 / $ 25.80
M-bs140-27 2.7 0.17 1.4 290 W 96 x 29 EUR 35,85 excl. VAT: € 30.13 / $ 28.16
M-bs140-30 3.0 0.18 1.4 270 W 96 x 29 EUR 36,75 excl. VAT: € 30.88 / $ 28.86
M-bs140-33 3.3 0.19 1.4 260 W 96 x 29 EUR 37,75 excl. VAT: € 31.72 / $ 29.65
M-bs140-39 3.9 0.21 1.4 240 W 96 x 29 EUR 38,75 excl. VAT: € 32.56 / $ 30.43
M-bs140-47 4.7 0.24 1.4 250 W 106 x 32 EUR 39,65 excl. VAT: € 33.32 / $ 31.14
M-bs140-56 5.6 0.26 1.4 230 W 106 x 32 EUR 40,65 excl. VAT: € 34.16 / $ 31.92
M-bs140-68 6.8 0.30 1.4 200 W 106 x 34 EUR 41,65 excl. VAT: € 35.00 / $ 32.71
M-bs140-82 8.2 0.33 1.4 180 W 106 x 34 EUR 42,55 excl. VAT: € 35.76 / $ 33.42
M-bs140-100 10.0 0.38 1.4 180 W 130 x 35 EUR 44,55 excl. VAT: € 37.44 / $ 34.99
M-bs140-120 12.0 0.42 1.4 160 W 130 x 35 EUR 46,45 excl. VAT: € 39.03 / $ 36.48
M-bs140-150 15.0 0.48 1.4 145 W 130 x 37 EUR 48,45 excl. VAT: € 40.71 / $ 38.05
M-bs140-180 18.0 0.54 1.4 130 W 130 x 37 EUR 50,35 excl. VAT: € 42.31 / $ 39.54
M-bs140-220 22.0 0.56 1.4 135 W 150 x 42 EUR 52,90 excl. VAT: € 44.45 / $ 41.55
M-bs140-270 27.0 0.64 1.4 120 W 150 x 42 EUR 55,90 excl. VAT: € 46.97 / $ 43.90
M-bs140-330 33.0 0.74 1.4 105 W 150 x 43 EUR 60,90 excl. VAT: € 51.18 / $ 47.83
*) 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.
Feron core coil (BS coil, i core coil) BS71 BS100 BS125 BS140 copper foil i core coil CFI14

Coils overview
Mundorf coils Properties
Air core coils good price/performance ratio; low distortion
Baked varnish air core coils good price/performance ratio; low distortion
Copper foil coil (cfc) with excellent three-dimensionality and attention to detail; they belong to the group of exceptionally neutral .
Air-core coils made from silver/gold wire
Ferrit core coils good price/performance ratio; high inductivity
H Core Coils small impedance; high power handling
Aronit core coils
Feron i core coils small impedance; very high power handling
Zero Ohm Coils very small impedance; very high power handling