Ferrit core coils:

Baked varnish:

Mundorf ferrit core coil

Technical specifications:

Toleranz: 3%
Core material: Ferrit
Copper 99.99%
Coil form: PA, fi bre-glass reinforced

In non-impregnated coils, vibration occurs as a result of the current flowing through the coil. The microphonic effect, i.e. the conversion of mechanical into electric oscillations, adds these oscillations back to the original signal as additional information. In this way, details of the original signal are overlaid and rendered unrecognisable. The music loses spatial quality and transparency. This process is prevented by

vacuum impregnation
baked varnish coils are made from a special wire
copper foil coils

Baked varnish coils of this type can be found below. Their product ID starts with "b"
Copper foil coils can be found at the end of this page.

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.

Ferrit core coil F50 (wire with 0.5 mm diameter)

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-f50-10	1.0	0.79	0.50	9.3 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f50-12	1.2	0.90	0.50	8.7 W	30 x 20	EUR 6,10 excl. VAT: € 5.13 / $ 6.20
M-f50-15	1.5	1.1	0.50	7.7 W	30 x 20	EUR 6,50 excl. VAT: € 5.46 / $ 6.61
M-f50-18	1.8	1.2	0.50	7.5 W	30 x 20	EUR 6,20 excl. VAT: € 5.21 / $ 6.30
M-f50-20	2.0	1.2	0.50	7.3 W	30 x 20	EUR 6,70 excl. VAT: € 5.63 / $ 6.81
M-f50-22	2.2	1.3	0.50	7.5 W	30 x 20	EUR 6,60 excl. VAT: € 5.55 / $ 6.71
M-f50-27	2.7	1.5	0.50	7.2 W	30 x 20	EUR 6,70 excl. VAT: € 5.63 / $ 6.81
M-f50-30	3.0	1.6	0.50	7.2 W	30 x 20	EUR 7,40 excl. VAT: € 6.22 / $ 7.52
M-f50-33	3.3	1.7	0.50	7.2 W	30 x 20	EUR 7,40 excl. VAT: € 6.22 / $ 7.52
M-f50-39	3.9	1.8	0.50	7.2 W	30 x 20	EUR 7,70 excl. VAT: € 6.47 / $ 7.83
M-f50-47	4.7	2.2	0.50	6.5 W	30 x 20	EUR 8,10 excl. VAT: € 6.81 / $ 8.24
M-f50-56	5.6	2.4	0.50	6.1 W	30 x 20	EUR 8,60 excl. VAT: € 7.23 / $ 8.74
M-f50-68	6.8	2.8	0.50	5.7 W	30 x 20	EUR 9,60 excl. VAT: € 8.07 / $ 9.76
M-f50-82	8.2	3.1	0.50	5.2 W	30 x 20	EUR 10,50 excl. VAT: € 8.82 / $ 10.68
M-f50-100	10.0	3.5	0.50	5.7 W	40 x 20	EUR 11,50 excl. VAT: € 9.66 / $ 11.69
M-f50-120	12.0	4.3	0.50	4.9 W	40 x 20	EUR 12,50 excl. VAT: € 10.50 / $ 12.71
M-f50-150	15.0	5.1	0.50	4.4 W	40 x 20	EUR 13,50 excl. VAT: € 11.34 / $ 13.73
M-f50-180	18.0	5.8	0.50	4.1 W	40 x 20	EUR 15,50 excl. VAT: € 13.03 / $ 15.76
M-f50-220	22.0	6.7	0.50	3.7 W	40 x 20	EUR 17,40 excl. VAT: € 14.62 / $ 17.69

((*) 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:

Baked varnish:

Ferrit core coil F60 (wire with 0.6 mm diameter)

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-f60-22	2.2	1.1	0.60	13 W	30 x 20	- not available
M-f60-27	2.7	1.3	0.60	12 W	30 x 20	- not available
M-f60-30	3.0	1.3	0.60	12 W	30 x 20	- not available
M-f60-33	3.3	1.4	0.60	12 W	30 x 20	- not available
M-f60-39	3.9	1.5	0.60	14 W	40 x 20	- not available
M-f60-47	4.7	1.8	0.60	12 W	40 x 20	- not available
M-f60-56	5.6	2.0	0.60	11 W	40 x 20	- not available
M-f60-68	6.8	2.2	0.60	11 W	40 x 20	- not available
M-f60-82	8.2	2.6	0.60	9.5 W	40 x 20	- not available

((*) 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:

Baked varnish:

Ferrit core coil F71 (wire with 0.7 mm diameter)

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-f71-01	0.10	0.12	0.71	57 W	30 x 20	EUR 6,10 excl. VAT: € 5.13 / $ 6.20
M-f71-012	0.12	0.13	0.71	55 W	30 x 20	EUR 6,10 excl. VAT: € 5.13 / $ 6.20
M-f71-015	0.15	0.15	0.71	50 W	30 x 20	EUR 6,30 excl. VAT: € 5.29 / $ 6.41
M-f71-018	0.18	0.16	0.71	49 W	30 x 20	EUR 6,50 excl. VAT: € 5.46 / $ 6.61
M-f71-022	0.22	0.18	0.71	46 W	30 x 20	EUR 6,60 excl. VAT: € 5.55 / $ 6.71
M-f71-027	0.27	0.21	0.71	41 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-f71-033	0.33	0.23	0.71	39 W	30 x 20	EUR 7,10 excl. VAT: € 5.97 / $ 7.22
M-f71-039	0.39	0.26	0.71	37 W	30 x 20	EUR 7,30 excl. VAT: € 6.13 / $ 7.42
M-f71-047	0.47	0.29	0.71	34 W	30 x 20	EUR 7,50 excl. VAT: € 6.30 / $ 7.63
M-f71-056	0.56	0.32	0.71	32 W	30 x 20	EUR 8,10 excl. VAT: € 6.81 / $ 8.24
M-f71-068	0.68	0.36	0.71	30 W	30 x 20	EUR 5,20 excl. VAT: € 4.37 / $ 5.29
M-f71-082	0.82	0.41	0.71	28 W	30 x 20	EUR 5,40 excl. VAT: € 4.54 / $ 5.49
M-f71-10	1.0	0.46	0.71	27 W	30 x 20	EUR 5,50 excl. VAT: € 4.62 / $ 5.59
M-f71-12	1.2	0.54	0.71	24 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f71-15	1.5	0.61	0.71	23 W	30 x 20	EUR 6,30 excl. VAT: € 5.29 / $ 6.41
M-f71-18	1.8	0.73	0.71	20 W	30 x 20	EUR 6,70 excl. VAT: € 5.63 / $ 6.81
M-f71-20	2.0	0.85	0.71	18 W	30 x 20	EUR 7,10 excl. VAT: € 5.97 / $ 7.22
M-f71-22	2.2	0.91	0.71	18 W	30 x 20	EUR 7,50 excl. VAT: € 6.30 / $ 7.63
M-f71-27	2.7	1.0	0.71	19 W	40 x 20	EUR 8,30 excl. VAT: € 6.97 / $ 8.44
M-f71-30	3.0	1.1	0.71	19 W	40 x 20	EUR 8,70 excl. VAT: € 7.31 / $ 8.85
M-f71-33	3.3	1.1	0.71	19 W	40 x 20	EUR 9,10 excl. VAT: € 7.65 / $ 9.25
M-f71-39	3.9	1.3	0.71	18 W	40 x 20	EUR 10,00 excl. VAT: € 8.40 / $ 10.17
M-f71-47	4.7	1.4	0.71	17 W	40 x 20	EUR 10,60 excl. VAT: € 8.91 / $ 10.78
M-f71-56	5.6	1.5	0.71	16 W	40 x 20	EUR 11,00 excl. VAT: € 9.24 / $ 11.18

((*) 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:

Baked varnish:

Ferrit core coil F100 (wire with 1.0 mm diameter)

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-f100-01	0.10	0.07	1.00	150 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f100-012	0.12	0.08	1.00	137 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f100-015	0.15	0.09	1.00	129 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f100-018	0.18	0.10	1.00	123 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f100-022	0.22	0.11	1.00	119 W	30 x 20	EUR 5,90 excl. VAT: € 4.96 / $ 6.00
M-f100-027	0.27	0.13	1.00	107 W	30 x 20	EUR 6,00 excl. VAT: € 5.04 / $ 6.10
M-f100-033	0.33	0.15	1.00	98 W	30 x 20	EUR 6,50 excl. VAT: € 5.46 / $ 6.61
M-f100-039	0.39	0.16	1.00	97 W	30 x 20	EUR 6,70 excl. VAT: € 5.63 / $ 6.81
M-f100-047	0.47	0.19	1.00	86 W	30 x 20	EUR 7,20 excl. VAT: € 6.05 / $ 7.32
M-f100-056	0.56	0.22	1.00	91 W	40 x 20	EUR 8,10 excl. VAT: € 6.81 / $ 8.24
M-f100-068	0.68	0.20	1.00	106 W	40 x 20	EUR 8,60 excl. VAT: € 7.23 / $ 8.74
M-f100-082	0.82	0.30	1.00	75 W	40 x 20	EUR 9,10 excl. VAT: € 7.65 / $ 9.25
M-f100-10	1.0	0.30	1.00	79 W	40 x 20	EUR 9,20 excl. VAT: € 7.73 / $ 9.35
M-f100-12	1.2	0.40	1.00	62 W	40 x 20	EUR 10,10 excl. VAT: € 8.49 / $ 10.27

((*) 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:

Baked varnish:

Ferrit core coil BF71 with baked 0.7 mm wire

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-bf71-01	0.10	0.12	0.71	57 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-012	0.12	0.13	0.71	55 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-015	0.15	0.15	0.71	50 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-018	0.18	0.16	0.71	49 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-022	0.22	0.18	0.71	46 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-027	0.27	0.21	0.71	41 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-033	0.33	0.23	0.71	41 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-039	0.39	0.26	0.71	37 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-047	0.47	0.29	0.71	34 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-056	0.56	0.32	0.71	33 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-068	0.68	0.36	0.71	31 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-082	0.82	0.41	0.71	29 W	30 x 20	EUR 6,90 excl. VAT: € 5.80 / $ 7.02
M-bf71-10	1.0	0.46	0.71	27 W	30 x 20	EUR 7,50 excl. VAT: € 6.30 / $ 7.63
M-bf71-12	1.2	0.54	0.71	24 W	30 x 20	EUR 8,30 excl. VAT: € 6.97 / $ 8.44
M-bf71-15	1.5	0.61	0.71	23 W	30 x 20	EUR 8,30 excl. VAT: € 6.97 / $ 8.44
M-bf71-18	1.8	0.73	0.71	20 W	30 x 20	EUR 9,10 excl. VAT: € 7.65 / $ 9.25
M-bf71-20	2.0	0.85	0.71	18 W	30 x 20	EUR 9,60 excl. VAT: € 8.07 / $ 9.76
M-bf71-22	2.2	0.91	0.71	18 W	30 x 20	EUR 9,60 excl. VAT: € 8.07 / $ 9.76
M-bf71-27	2.7	1.0	0.71	19 W	40 x 20	EUR 10,60 excl. VAT: € 8.91 / $ 10.78
M-bf71-30	3.0	1.1	0.71	19 W	40 x 20	EUR 11,00 excl. VAT: € 9.24 / $ 11.18
M-bf71-33	3.3	1.1	0.71	19 W	40 x 20	EUR 12,10 excl. VAT: € 10.17 / $ 12.30
M-bf71-39	3.9	1.3	0.71	18 W	40 x 20	EUR 13,10 excl. VAT: € 11.01 / $ 13.32
M-bf71-47	4.7	1.4	0.71	17 W	40 x 20	EUR 13,00 excl. VAT: € 10.92 / $ 13.22
M-bf71-56	5.6	1.5	0.71	16 W	40 x 20	EUR 14,00 excl. VAT: € 11.76 / $ 14.24

((*) 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:

Baked varnish:

Ferrit core coil BF100 with baked 1.0 mm wire

Product ID	L/mH	R/Ohm	Wire- D/mm	Pmax^*) 8Ohm	Coil Size (DxH/mm)	Price
M-bf100-01	0.10	0.07	1.00	150 W	30 x 20	- not available (_)
M-bf100-012	0.12	0.08	1.00	137 W	30 x 20	EUR 8,00 excl. VAT: € 6.72 / $ 8.13
M-bf100-015	0.15	0.09	1.00	129 W	30 x 20	EUR 8,00 excl. VAT: € 6.72 / $ 8.13
M-bf100-018	0.18	0.10	1.00	123 W	30 x 20	EUR 8,00 excl. VAT: € 6.72 / $ 8.13
M-bf100-022	0.22	0.11	1.00	119 W	30 x 20	EUR 8,00 excl. VAT: € 6.72 / $ 8.13
M-bf100-027	0.27	0.13	1.00	107 W	30 x 20	EUR 8,20 excl. VAT: € 6.89 / $ 8.34
M-bf100-033	0.33	0.15	1.00	98 W	30 x 20	EUR 8,50 excl. VAT: € 7.14 / $ 8.64
M-bf100-039	0.39	0.16	1.00	97 W	30 x 20	EUR 8,80 excl. VAT: € 7.39 / $ 8.95
M-bf100-047	0.47	0.19	1.00	86 W	30 x 20	EUR 9,30 excl. VAT: € 7.82 / $ 9.46
M-bf100-056	0.56	0.22	1.00	85 W	40 x 20	EUR 9,70 excl. VAT: € 8.15 / $ 9.86
M-bf100-068	0.68	0.20	1.00	100 W	40 x 20	EUR 9,60 excl. VAT: € 8.07 / $ 9.76
M-bf100-082	0.82	0.30	1.00	71 W	40 x 20	EUR 10,50 excl. VAT: € 8.82 / $ 10.68
M-bf100-10	1.0	0.30	1.00	75 W	40 x 20	EUR 13,00 excl. VAT: € 10.92 / $ 13.22
M-bf100-11	1.1	0.40	1.00	59 W	40 x 20	EUR 13,00 excl. VAT: € 10.92 / $ 13.22
M-bf100-12	1.2	0.40	1.00	62 W	40 x 20	EUR 13,60 excl. VAT: € 11.43 / $ 13.83

((*) 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.

Ferrit core coils:

Baked varnish:

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	small impedance; high power handling
Feron i core coils	small impedance; very high power handling
Zero Ohm Coils	very small impedance; very high power handling