0.0..
12dB/OCTAVE
PASSIVE CROSSOVER CHART
12 dB/octave hiah pass | 12 dB/octave lowpass |
KEY
Ll = high quality (DCR < 1 ohm) inductor/coil
Cl =
| 2 | ohms | 4 | ohms | 8 | ohms | |
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FREQ. | Ll | Cl |
| Ll | Cl | Ll | Cl |
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80 HZ | 5.5 mH | 660 uF | It mH | 330 PF | 22mH | 16OkF | |
IOOHZ | 4.7 mH | 560 | pF | 9.1 mH | 270 pF | 16mH | t5OpF |
130 Hz | 3.3 mH | 400 pF | 6~6 mH | 2W pF | 15mH | too ,,F | |
2wHZ | 2.2 mH | 3W | pF | 4.7 mH | 15OpF | 9.1 mH | 75 IF |
260 HZ | 1.6 mH | 2W | PF | 3.6 mH | 1OQwF | 6.6 mH | 50 NF |
400 Hz | 1.1 mH | 150 pF | 2.2 mH | 68 pF | 4.7 mti | 33 UF | |
6OO Hz. | 0.76 mti | loOtIF | I,5 mH | 47 pF | 3.0 mH | 26 pF | |
600 Hz | 0.5 mH | 68 )IF | LOmH | 33 ,,F | 2~0 mH | t5pF | |
,wo HZ | 0.47 mH | 6QPF | 0.9 mH | 27 vF | 1.6 mtl | 13pF | |
,200 Hz | 0.33 mH | 44 pF | 0.75 rnH | 22 PF | 1.5 mH | 1tpF | |
,600 Hz | 0.27 mH | 30 IF | 0.50 mH | l6PF | t.OmH | 6,6 pF | |
4OCQ Hz | 0~10 mH | 15pF | 0.22 rnH | 66llF | ,3.47 mH | 33pF | |
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CROSSOVER ADJUSTMENTS
In most car audio installations, there is a tendency for a “midbass boom.” Because of their interior dimensions, most cars will resonate or ring at these midbass frequencies. If we design the system so there is less musical information in this region, the fin?. response is very smooth and natural sounding.
The REFERENCE300sx incorporates electronic crossover.
The high and low pass portions of the crossover can be set independent of one another.
Below is a chart of S.I.P. values which can be used for changing the factory p r e s e t C~OSSOVB~ points for the
FREQUENCY RESISTOR VALUE COLOR CODE
| 53 Hz | 30 K n | |||
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| 73 Hz | 22Kn | |||
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| 89 Hz | 18KR |
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107 | Hz | 15KR | Vblet.Green | ||
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145 | Hz | 11 | Kcl | ||
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1% | HZ | 6.2Kn |
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286 | Hz | 5.6 | KfI |
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465 | Hz | 3.3 | K LI |
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| 8M) Hz | 2.0 K 0 |
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NOTE: The following formula may be used to determine values in creating ?ustom” resistor packs. The frequency is equal to 1,600,OOO divided by the Chdiv;dual resistor value, or 1.600.000 I R ohms = X HI. To make a custom
1 S.I.P., use 4 identically valued resistors of 2% or tighter tolerance. See Ihe drawing of fhe S.I. P. fir more information.
