Linear phase crossover for mac os5/29/2023 ![]() ![]() Some loudspeaker systems come as a package with a dedicated loudspeaker control unit. A third-party unit would not compensate for any deficiencies in the driver units.It is possible to connect the crossover incorrectly and send LF to the HF driver and vice versa.Limiters can be built into each band to help avoid blowing drive units.Power amplifier connects directly to drive unit - no wastage of power & better control over diaphragm motion.Cutoff frequency and slope can be varied.Likewise, active crossovers have advantages: Not always accurate & component values can change over time.Not practical to produce a 24 dB/octave slope.Usually matched by the loudspeaker manufacturer to the requirements of the drive units.Passive crossovers have a number of advantages: Linear phase mode, for both linear phase multiband operation and linear phase. There are issues with the phase response of crossover filters that vary according to slope, but this is an advanced topic that few working sound engineers would contemplate to any great extent. PiMax also features control over program-dependent saturation modes. 12 dB/octave is workable, but most systems these days use 18 dB/octave or 24 dB/octave. Low frequencies would be sent to the tweeter that could damage it. High frequencies would be sent to the woofer at sufficient level that there would be audible distortion due to break up. A filter with a slope of, say, 9 dB per octave would be much more complex.Īs it happens, a slope of 6 dB per octave is useless. ![]() The slopes mentioned are actually the easy ones to design. In other words, in the band of frequencies where the slope has kicked in, as the frequency doubles the response drops by that number of decibels. So frequencies beyond the cutoff frequency (where the response has dropped by 3 dB from normal) are rolled off at a rate of 6, 12, 18 or 24 dB per octave. It is impractical, and actually undesirable, to have a filter that allows frequencies up to, say, 4 kHz to pass and then cut off everything above that completely. A system with a three-band active crossover would require three power amplifiers.Ĭrossovers have two principal parameter sets: the cut off frequencies of the bands, and the slopes of the filters. It sits between the output of the mixing console and a number of power amplifiers - one for each division of the frequency band. An active crossover on the other hand does contain transistors or ICs and requires mains power. Having no active components, it doesn't need to be powered. A passive crossover is generally internal to the cabinet and consists of a network of capacitors, inductors and resistors. The function of the crossover is to separate low, mid and high frequencies according to the number of drive units in the loudspeaker. Learn how to become a better producer in your own home recording studio > ![]()
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