Car Audio / Passive Crossovers, 2 Ohm Reference Charts

If you need a 16 mHy coil, you can series a 12.8 mHy coil and a 3.2 mHy coil. If you need a 70 µfd capacitor, you can parallel two 35 µfd capacitors. When the exact value of a coil or capacitor is not available, you can substitute values of ± 5% . To get the needed values for desired crossover frequencies not listed, use these formulas & calculators

2 Ohm Low Pass, High Pass, Band Pass Reference Chart

Low Pass, High Pass, Band Pass for 2 Ohm Load Crossover Frequency 1st Order 6dB 2nd Order 12db 3rd Order 18dB Hz L1 C1 L2 C2 L3 C3 L4 C4 L5 C5 50 6.37 1592 9 1125 9.55 2117 3.18 1062 4.77 3183 60 5.31 1326 7.5 938 7.96 1764 2.65 885 3.98 2653 70 4.55 1137 6.4 804 6.82 1512 2.27 758 3.41 2274 75 4.24 1061 6 750 6.37 1411 2.12 708 3.18 2122 80 3.98 995 5.63 703 5.97 1323 1.99 663 2.98 1989 85 3.74 936 5.3 662 5.62 1245 1.87 624 2.81 1872 100 3.18 796 4.5 563 4.77 1058 1.59 531 2.39 1592 120 2.65 663 3.75 469 3.98 882 1.33 442 1.99 1326 125 2.55 637 3.6 450 3.82 847 1.27 425 1.91 1273 150 2.12 531 3 375 3.18 706 1.06 354 1.59 1061 200 1.59 398 2.25 281 2.39 529 0.8 265 1.19 796 250 1.27 318 1.8 225 1.91 423 0.64 212 0.95 637 275 1.16 289 1.64 205 1.74 385 0.58 193 0.87 579 300 1.06 265 1.5 188 1.59 353 0.53 177 0.8 531 400 0.8 199 1.13 141 1.19 265 0.4 133 0.6 398 500 0.64 159 0.9 113 0.95 212 0.32 106 0.48 318 600 0.53 133 0.75 94 0.8 176 0.27 88 0.4 265 800 0.4 99 0.56 70 0.6 132 0.2 66 0.3 199 1000 0.32 80 0.45 56 0.48 106 0.16 53 0.24 159 2000 0.16 40 0.23 28 0.24 53 0.08 27 0.12 80 2500 0.13 32 0.18 23 0.19 42 0.06 21 0.1 64 3000 0.11 27 0.15 19 0.16 35 0.05 18 0.08 53 3500 0.09 23 0.13 16 0.14 30 0.05 15 0.07 46 4000 0.08 20 0.11 14 0.12 27 0.04 13 0.06 40 5000 0.06 16 0.09 11 0.1 21 0.03 11 0.05 32 6000 0.05 13 0.08 9.4 0.08 18 0.03 8.8 0.04 27 7000 0.05 11 0.06 8 0.07 15 0.02 7.6 0.03 23 8000 0.04 9.9 0.06 7 0.06 13 0.02 6.6 0.03 20 9000 0.04 8.8 0.05 6.3 0.05 12 0.02 5.9 0.03 18 10000 0.03 8 0.05 5.6 0.05 11 0.02 5.3 0.02 16 Capacitor (C) values = microfarads (µfd) Coil (L) values = millihenries (mHy)

2 Ohm Narrow Band Pass Reference Chart

Narrow Band Pass for 2 Ohm Load - Mid-Bass Loudspeakers Crossover Frequency 1st Order 6dB 2nd Order 12dB 3rd Order 18dB Hz L1 C1 L2 C2 L3 C3 L4 C4 L5 C5 L6 C6 100 - 250 2.1 478 2.7 375 3 338 3.2 321 1.42 713 1.06 955 100 - 300 1.59 531 3 281 2.25 375 2.37 356 1.59 535 0.8 1061 100 - 400 1.06 597 3.38 188 1.5 422 1.5 401 1.8 356 0.53 1194 100 - 500 0.8 637 3.6 141 1.13 450 1.13 428 1.9 265 0.4 1273 60 - 200 2.27 929 5.25 402 3.22 656 3.39 624 2.76 764 1.14 1857 60 - 300 1.33 1061 6 234 1.88 750 1.97 713 3.16 446 0.66 2122 70 - 200 2.5 739 4.2 433 3.46 523 3.6 496 2.2 823 1.27 1478 70 - 300 1.38 872 5.1 245 1.96 616 2.1 585 2.5 468 0.69 1743 70 - 400 0.96 938 5.3 170 1.36 663 1.5 630 2.79 324 0.48 1876 80 - 200 2.65 597 3.38 469 3.75 422 3.95 398 1.8 891 1.33 1194 80 - 300 1.5 730 4.2 256 2.1 516 2.1 490 2.1 486 0.72 1459 80 - 400 0.99 796 4.5 176 1.41 563 1.5 535 2.37 334 0.5 1592 85 - 200 2.77 538 3 489 3.92 381 4.2 362 1.59 930 1.38 1077 85 - 300 1.5 671 3.8 265 2.1 474 2.2 451 2.1 497 0.74 1342 85 - 400 1.06 737 1.43 521 4.2 179 1.5 495 2.1 339 0.51 1475 Capacitor (C) values = microfarads (µfd) Coil (L) values = millihenries (mHy)

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