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Loudspeaker Crossover Inductors

See Article:  About crossover inductors

* Ferrite Bobbins

Ferrite Bobbin Cores

Ferrite Core Bobbins.

Four sizes of Ferrite Cored 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.

NOTE: All DCR values are calculated values based upon wire length and diameter.

* Ferrite Core Bobbins. All dims mm are approximate
Order Code Bobbin Type Max Ht Max Diam Core Diam Core Ht 1+
FBA1823 A 18 23 13 12 0.89 /ea
FBB2728 B 27 28 17 18 1.73 /ea
FBC2535 C 25 35 20 17 2.24 /ea
FBD3040 D 30 40 20 21 2.30 /ea


* Ferrite Inductors

* Ferrite Crossover Coils, Type B Bobbin   FBCB Series   1.0mm wire   Price per piece.   Other values wound to Order.
Order Code Spec. 1+    
  Ferrite Inductors, Type B Bobbin.1.0mm wire Tols 10% 5% 2%
FBCB10 0.10mH, 1.0mm Wire, DCR 0.040 Ohms 4.40 4.84 5.28
FBCB15 0.15mH, 1.0mm Wire, DCR 0.051 Ohms 4.45 4.90 5.34
FBCB18 0.18mH, 1.0mm Wire, DCR 0.056 Ohms 4.48 4.93 5.38
FBCB22 0.22mH, 1.0mm Wire, DCR 0.062 Ohms 4.50 4.95 5.40
FBCB25 0.25mH, 1.0mm Wire, DCR 0.066 Ohms 4.53 4.98 5.44
FBCB27 0.27mH, 1.0mm Wire, DCR 0.070 Ohms 4.56 5.02 5.47
 
FBCB30 0.30mH, 1.0mm Wire, DCR 0.074 Ohms 4.59 5.05 5.50
FBCB33 0.33mH, 1.0mm Wire, DCR 0.079 Ohms 4.62 5.08 5.54
FBCB39 0.39mH, 1.0mm Wire, DCR 0.088 Ohms 4.64 5.10 5.57
FBCB42 0.42mH, 1.0mm Wire, DCR 0.094 Ohms 4.67 5.14 5.60
FBCB47 0.47mH, 1.0mm Wire, DCR 0.099 Ohms 4.69 5.16 5.63
FBCB51 0.51mH, 1.0mm Wire, DCR 0.105 Ohms 4.72 5.19 5.66
FBCB56 0.56mH, 1.0mm Wire, DCR 0.110 Ohms 4.75 5.23 5.70
FBCB60 0.60mH, 1.0mm Wire, DCR 0.114 Ohms 4.78 5.26 5.74


* Ferrite Crossover Coils, Type C Bobbin  FBCC Series   0.8mm wire   Price per piece.   Other values wound to Order.
Order Code Spec. 1+    
  Ferrite Inductors, Type C Bobbin 0.8mm wire Tols 10% 5% 2%
FBCC47 0.47mH, 0.8mm Wire, DCR 0.14 Ohms 5.18 5.70 6.21
FBCC56 0.56mH, 0.8mm Wire, DCR 0.16 Ohms 5.26 5.77 6.31
FBCC68 0.68mH, 0.8mm Wire, DCR 0.17 Ohms 5.27 5.80 6.32
FBCC75 0.75mH, 0.8mm Wire, DCR 0.18 Ohms 5.30 5.83 6.36
FBCC82 0.82mH, 0.8mm Wire, DCR 0.19 Ohms 5.32 5.85 6.38
FBCC91 0.91mH, 0.8mm Wire, DCR 0.21 Ohms 5.35 5.88 6.42
FBCC10 1.00mH, 0.8mm Wire, DCR 0.22 Ohms 5.41 5.95 6.49
FBCC12 1.20mH, 0.8mm Wire, DCR 0.24 Ohms 5.60 6.16 6.72
FBCC15 1.50mH, 0.8mm Wire, DCR 0.27 Ohms 5.64 6.20 6.76
FBCC18 1.80mH, 0.8mm Wire, DCR 0.31 Ohms 5.76 6.34 6.91
FBCC22 2.20mH, 0.8mm Wire, DCR 0.35 Ohms 5.89 6.48 7.06
FBCC25 2.50mH, 0.8mm Wire, DCR 0.38 Ohms 6.06 6.67 7.27

* Ferrite Crossover Coils, Type C. Bobbin   FBCC Series   1.0mm wire   Price per piece.   Other values wound to Order.
Order Code Spec. 1+    
  Ferrite Inductors, Type C Bobbin. Tols 10% 5% 2%
FBCCE10 0.10mH, 1.0mm Wire, DCR 0.04 Ohms 4.99 5.49 5.99
FBCCE15 0.15mH, 1.0mm Wire, DCR 0.05 Ohms 5.04 5.54 6.05
FBCCE20 0.20mH, 1.0mm Wire, DCR 0.06 Ohms 5.09 5.60 6.10
FBCCE22 0.22mH, 1.0mm Wire, DCR 0.06 Ohms 5.19 5.70 6.23
FBCCE33 0.33mH, 1.0mm Wire, DCR 0.08 Ohms 5.33 5.86 6.40
FBCCE47 0.47mH, 1.0mm Wire, DCR 0.10 Ohms 5.44 5.98 6.53
FBCCE56 0.56mH, 1.0mm Wire, DCR 0.11 Ohms 5.54 6.09 6.65
FBCCE68 0.68mH, 1.0mm Wire, DCR 0.12 Ohms 5.57 6.24 6.68
FBCCE75 0.75mH, 1.0mm Wire, DCR 0.125 Ohms 5.74 6.31 6.89
FBCCE82 0.82mH, 1.0mm Wire, DCR 0.13 Ohms 5.80 6.38 6.96
FBCCE91 0.91mH, 1.0mm Wire, DCR 0.14 Ohms 5.87 6.46 7.04
FBCCE100 1.00mH, 1.0mm Wire, DCR 0.15 Ohms 5.93 6.52 7.11


* 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 Spec. 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 Spec. 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 Spec. 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 Spec. 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%.