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Loudspeaker Crossover Inductors

See Article:  About crossover inductors

* Ferrite Bobbins

Ferrite Bobbin Cores

Ferrite Core Bobbins.

Four sizes of Ferrite Core Bobbins suitable for winding custom value Inductors as used in loudspeaker crossovers. Designated as Type A through to D.
A 'guide' to usage is as follows:-

Type A: FBA1823 Small value Inductors for Tweeter frequency modifications / tweeks.
Type B: FBB2728 Low power Bass and Tweeter crossovers to 50w rms max. system power.
Type C: FBC2535 Medium power Bass and Tweeter crossovers to 80w rms max. system power.
Type D: FBD3040 Medium power Bass and Tweeter crossovers to 100w rms max. system power.


* Ferrite Core Bobbins. All dims mm are approximate
Order Code Max Ht Max Diam Core Diam Core Ht 1+ 6+
FBA1823 18 23 13 12 0.89 /ea 0.85 /ea
FBB2728 27 28 17 18 1.73 /ea 1.65 /ea
FBC2535 25 35 20 17 2.24 /ea 2.13 /ea
FBD3040 30 40 20 21 2.30 /ea 2.19 /ea


* Ferrite Inductors

* Ferrite Crossover Coils, Type C. Price per piece.
Order Code Description 1+    
  Ferrite Inductors, Type C Bobbin. Tols 10% 5% 2%
FBCC47 0.47mH, 0.8mm Wire, DCR 0.14 Ohms 4.16 4.57 4.99
FBCC56 0.56mH, 0.8mm Wire, DCR 0.16 Ohms 4.28 4.70 5.13
FBCC68 0.68mH, 0.8mm Wire, DCR 0.17 Ohms 4.46 4.90 5.35
FBCC75 0.75mH, 0.8mm Wire, DCR 0.18 Ohms 4.51 4.97 5.41
FBCC82 0.82mH, 0.8mm Wire, DCR 0.19 Ohms 4.57 5.03 5.48
FBCC91 0.91mH, 0.8mm Wire, DCR 0.21 Ohms 4.66 5.12 5.59
FBCC10 1.00mH, 0.8mm Wire, DCR 0.22 Ohms 4.73 5.21 5.67
FBCC12 1.20mH, 0.8mm Wire, DCR 0.24 Ohms 4.98 5.47 5.97
FBCC15 1.50mH, 0.8mm Wire, DCR 0.27 Ohms 5.21 5.73 6.25
FBCC18 1.80mH, 0.8mm Wire, DCR 0.31 Ohms 5.34 5.87 6.41
FBCC22 2.20mH, 0.8mm Wire, DCR 0.35 Ohms 5.48 6.04 6.58
FBCC25 2.50mH, 0.8mm Wire, DCR 0.38 Ohms 5.72 6.29 6.86

* Air Core Bobbins

Air Cored Bobbins

Glass Reinforced Air Core Bobbins.

Three sizes of Glass reinforced polyamid coil formers suitable for the DIY constructor to wind custom coils for that special project. Using 1.0mm copper wire the following inductance ranges can be achieved.
Type 1 Bobbin (0.1 - 0.39)mH,
Type 2 Bobbin(0.1 - 0.91)mH,
Type 3 Bobbin 0.47 - 2.2)mH.

* Air Cored Bobbins. Price Each.
Order Code Description 1+ 6+ 11+
ACFRMS1 Air Core Bobbin Height 17mm. Diam 40mm. 0.84 /ea 0.80 /ea 0.75 /ea
ACFRMS2 Air Core Bobbin Height 15mm. Diam 47mm. 1.53 /ea 1.45 /ea 1.38 /ea
ACFRMS3 Air Core Bobbin Height 25mm. Diam 58mm. 1.12 /ea 1.07 /ea 1.02 /ea


* Air Core Inductors

Air Cored Crossover Inductors

Air Core Inductors.

Air cored crossover inductors wound on hard glass-reinforced Polyamid formers.
Type 1 Bobbin (0.1 to 0.39)mH, (17 * 40)mm,
Type 2 Bobbin (0.1 to 0.68)mH, (15 * 47)mm,
Type 3 Bobbin (0.47 to 2.2)mH, (25 * 58)mm.
Centre boltdown with M4 Nylon bolt or fix with Silicone.
Tolerances +/- (10%, 5% or 2%).

* Air Cored Crossover Coils, Type 1 Bobbin, (17 * 40)mm. 10%, 5%, 2%. Price Each.
Order Code Description 1+    
  Air Cored Coils, Type 1 Bobbin. Tols 10% 5% 2%
ACC110 0.10mH, 1.0mm Wire, DCR 0.12 Ohms 4.19 4.59 4.99
ACC115 0.15mH, 1.0mm Wire, DCR 0.16 Ohms 4.46 4.88 5.31
ACC122 0.22mH, 1.0mm Wire, DCR 0.20 Ohms 5.15 5.64 6.13
ACC133 0.33mH, 1.0mm Wire, DCR 0.25 Ohms 5.39 5.91 6.43
ACC139 0.39mH, 1.0mm Wire, DCR 0.29 Ohms 5.54 6.07 6.60


* Air Cored Coils, Type 2 Bobbin, (15 * 47)mm. 10%, 5%, 2%. Price Each.
Order Code Description 1+    
  Air Cored Inductors, Type 2 Bobbin. Tols 10% 5% 2%
ACC210 0.10mH, 1.0mm Wire, DCR 0.13 Ohms 4.73 5.12 5.53
ACC215 0.15mH, 1.0mm Wire, DCR 0.16 Ohms 5.00 5.42 5.85
ACC222 0.22mH, 1.0mm Wire, DCR 0.20 Ohms 5.69 6.17 6.67
ACC233 0.33mH, 1.0mm Wire, DCR 0.25 Ohms 5.94 6.46 6.98
ACC239 0.39mH, 1.0mm Wire, DCR 0.27 Ohms 5.28 6.62 7.15
ACC247 0.47mH, 1.0mm Wire, DCR 0.30 Ohms 6.21 6.75 7.30
ACC256 0.56mH, 1.0mm Wire, DCR 0.34 Ohms 6.61 7.19 7.78
ACC268 0.68mH, 1.0mm Wire, DCR 0.38 Ohms 7.01 7.64 8.25

* Air Core Crossover Coils, Type 3 Bobbin, (25 * 58)mm. 10%, 5%, 2%. Price Each.
Order Code Description 1+    
Air Cored Inductors, Type 3 Bobbin. Tolerance 10% 5% 2%
ACC347 0.47mH, 1.0mm Wire, DCR 0.30 Ohms 5.65 6.20 6.75
ACC356 0.56mH, 1.0mm Wire, DCR 0.34 Ohms 6.06 6.64 7.22
ACC368 0.68mH, 1.0mm Wire, DCR 0.38 Ohms 6.46 7.09 7.71
ACC375 0.75mH, 1.0mm Wire, DCR 0.41 Ohms 6.76 7.42 8.06
ACC382 0.82mH, 1.0mm Wire, DCR 0.45 Ohms 7.06 7.75 8.43
ACC391 0.91mH, 1.0mm Wire, DCR 0.49 Ohms 7.47 8.19 8.92
ACC310 1.00mH, 1.0mm Wire, DCR 0.51 Ohms 7.86 8.62 9.39
ACC312 1.20mH, 1.0mm Wire, DCR 0.60 Ohms 8.66 9.51 10.34
ACC315 1.50mH, 1.0mm Wire, DCR 0.64 Ohms 9.47 10.40 11.33
ACC318 1.80mH, 1.0mm Wire, DCR 0.71 Ohms 9.91 10.87 11.85
ACC322 2.20mH, 1.0mm Wire, DCR 0.81 Ohms 10.30 11.31 12.32

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All Prices include VAT @ 20%.