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
Audaphon 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 1,89 excl. VAT: € 1.59 / $ 1.42
I-0210 0.12 0.28 0.71 45 W 32 x 26 EUR 1,99 excl. VAT: € 1.67 / $ 1.49
I-0215 0.15 0.32 0.71 42 W 32 x 26 EUR 2,09 excl. VAT: € 1.76 / $ 1.57
I-0220 repl 0.18 0.35 0.71 40 W 32 x 25**) EUR 2,19 excl. VAT: € 1.84 / $ 1.64
I-0225 0.22 0.39 0.71 35 W 32 x 26 EUR 2,19 excl. VAT: € 1.84 / $ 1.64
I-0230 repl 0.27 0.43 0.71 32 W 32 x 25**) EUR 2,29 excl. VAT: € 1.92 / $ 1.72
I-0235 0.33 0.48 0.71 30 W 32 x 26 EUR 2,49 excl. VAT: € 2.09 / $ 1.87
I-0240 0.39 0.53 0.71 27 W 32 x 26 EUR 2,59 excl. VAT: € 2.18 / $ 1.94
I-0245 0.47 0.57 0.71 26 W 32 x 26 EUR 2,79 excl. VAT: € 2.34 / $ 2.09
*) 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 5,49 excl. VAT: € 4.61 / $ 4.12
I-0050 0.22 0.13 1.4 330 W 55 x 30 EUR 6,69 excl. VAT: € 5.62 / $ 5.02
I-0054 0.47 0.19 1.4 240 W 55 x 30 EUR 9,09 excl. VAT: € 7.64 / $ 6.82
I-0055 0.56 0.22 1.4 220 W 62 x 41 EUR 10,60 excl. VAT: € 8.91 / $ 7.95
I-0064 2.20 0.46 1.4 145 W 78 x 30 EUR 19,20 excl. VAT: € 16.13 / $ 14.41
I-0067 3.30 0.60 1.4 125 W 92 x 39 EUR 24,65 excl. VAT: € 20.71 / $ 18.49
I-0069 3.90 0.67 1.4 120 W 92 x 39 EUR 26,85 excl. VAT: € 22.56 / $ 20.15
I-0071 5.60 0.83 1.4 105 W 92 x 39 EUR 28,05 excl. VAT: € 23.57 / $ 21.05
*) 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 11,10 excl. VAT: € 9.33 / $ 8.33
I-0910 0.27 0.08 2.0 820W 62 x 41 EUR 13,10 excl. VAT: € 11.01 / $ 9.83
I-0918 0.56 0.12 2.0 630 W 92 x 39 EUR 19,50 excl. VAT: € 16.39 / $ 14.63
I-0073 2.20 0.30 2.0 420 W 120 x 80 EUR 42,55 excl. VAT: € 35.76 / $ 31.93
I-0075 2.70 0.33 2.0 400 W 120 x 80 EUR 47,95 excl. VAT: € 40.29 / $ 35.98
*) 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 14,60 excl. VAT: € 12.27 / $ 10.95
*) 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

Intertechnik Pilzkernspule
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 16,90 excl. VAT: € 14.20 / $ 12.68
I-0296 8.20 0.85 0.95 56.0 x 35.0 EUR 17,40 excl. VAT: € 14.62 / $ 13.06
I-0299 15.0 1.40 0.85 56.0 x 35.0 EUR 17,80 excl. VAT: € 14.96 / $ 13.36
I-1500134 27.0 1.76 0.95 62.0 x 47.0 EUR 20,60 excl. VAT: € 17.31 / $ 15.46

 
 

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-0198 10.0 0.93 0.85 - 43.0 x 45 EUR 12,10 excl. VAT: € 10.17 / $ 9.08
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)

Intertechnik Corobar-Spule 1,4mm
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 42,50 excl. VAT: € 35.71 / $ 31.89
 

i-Punkt© coils

Intertechnik i-Punkt-Spule
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 22,75 excl. VAT: € 19.12 / $ 17.07
I-1001 1.5 0.14 1.32 500 W 130 x 46 EUR 22,45 excl. VAT: € 18.87 / $ 16.84
I-1002 1.8 0.16 1.32 490 W 130 x 46 EUR 23,75 excl. VAT: € 19.96 / $ 17.82
I-1003 2.2 0.17 1.32 480 W 130 x 46 EUR 23,65 excl. VAT: € 19.87 / $ 17.74
I-1004 2.7 0.19 1.32 430 W 130 x 46 EUR 23,95 excl. VAT: € 20.13 / $ 17.97
I-1005 3.3 0.21 1.32 380 W 130 x 46 EUR 24,45 excl. VAT: € 20.55 / $ 18.34
I-1007 4.7 0.26 1.32 310 W 130 x 46 EUR 25,65 excl. VAT: € 21.55 / $ 19.25
I-1015 10 0.56 1.12 150 W 130 x 46 EUR 26,55 excl. VAT: € 22.31 / $ 19.92
*) 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).

smaller i-PunktŠ coils or different values upon request or as per IT catalogue
 

 
 

reasonably priced ferrite core coils

Intertechnik Luftspule 1,4mm
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 EUR 8,90 excl. VAT: € 7.48 / $ 6.68
I-0976 10.0 3.48 0.50 44 x 36 EUR 8,50 excl. VAT: € 7.14 / $ 6.38

 
 

Transformer core coils

for high power application in either circular (TO1000) orIntertechnik 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 EUR 47,90 excl. VAT: € 40.25 / $ 35.94
FE 96            
I-370 3.9 0.16 1.8 650 W 96x86x88 EUR 65,60 excl. VAT: € 55.13 / $ 49.22
FE 130            
I-750 6.8 0.12 2.5 1300 W 130x98x116 EUR 154,00 excl. VAT: € 129.41 / $ 115.55
I-800 18 0.33 2.0 550 W 130x98x116 EUR 115,00 excl. VAT: € 96.64 / $ 86.28
I-810 22 0.37 2.0 500 W 130x98x116 EUR 119,00 excl. VAT: € 100.00 / $ 89.29
*) 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 large Mundorf air core coils.

Mundorf CFC coils (copper foil capacitor)
with excellent three-dimensionality and attention to detail; they belong to the group of exceptionally neutral capacitors.

Mundorf Aronit core coils

Mundorf Feron i core coils

Mundorf Feron transformer core coils

Mundorf Zero Ohm Coils

Further coils upon request

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