Filtering is very important in a system, a complex filtering is not necessarily synonymous with quality. It is possible to combine active filter and passive filter in one system.
There are two types of passive filters:
- High Pass: the frequencies are removed below. For example a high pass at 2000 Hz passes frequencies above 2000 Hz,
- lowpass: frequencies above is removed from. For example a low pass at 2000 Hz passes frequencies below 2000 Hz
The 2-way crossover is comprised of a qualified filter module for "high pass" (high-pass filter) and a qualified filter module of "going down" (low pass filter). The cutoff frequencies of the two filters modules are generally identical.
3-way passive filters (and more) are composed of multiple filter modules "high pass" and "low-pass", the medium channel (center) composed of a high-pass and low-pass is called " bandpass "(band-pass filter). The filter module "band-pass" is nothing more than the combination of a filter "High Pass" filter and a "low pass".Moreover, the operational amplifiers generate noise. Historically, the first discrete filters ROE (+ RC circuit operational amplifier) appeared in the mid sixties. It should nevertheless expect the seventies, with the first commercial integrated circuit (HIC and DIP) to be revealed the economic interest of this type of filter.
DAS
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F-VT12
Passive crossover for DAS VANTEC-12
30006226
30006226
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Beyma
Unavailable |
FD2XA
Crossover Beyma FD2XA, 2 ways, 1800 Hz
2 way. Cut off frequency 1.8 kHz, power handling 600 WRMS, attenuation slope 12 dB/octave, HF attenuation 0 or -1.5 dB.
1FFD2XA
1FFD2XA
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DAS
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F-AE12
Passive crossover for DAS AERO-12
30005705
30005705
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Beyma
Unavailable |
F100
Passive crossover Beyma F100, mono high-pass 6300 Hz
1 way high-pass. Cut off frequency 6.3 kHz, power handling 300 WRMS, attenuation slope 18 dB/octave, attenuation 0 or -3 dB.
1FF100
1FF100
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DAS
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F-AR315
Passive crossover for DAS ARTEC-315.96 and ARTEC-315.64
30006593
30006593
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DAS
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F-AR510
Passive crossover for DAS ARTEC-510 and SF-10
30005456
30005456
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DAS
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F-ARTEC
Passive crossover for DAS
30007819
30007819
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Ciare
Unavailable |
Pair of 1-way low pass crossover, 100 Hz, 4 ohm, 85 x 130 mm
CF100
CF100
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