HiFi Loudspeaker Design
Is it a substantial improvement to add a RLC in parallel, especially with an high Z output amplifier?
From the datasheet, the Fane 15, 5.5ohms-13mH-850uF could be tried to tame the Fs impedance.
Or the same result can be achieved with a DSP/EQ?
Does it worth it?
Is it a substantial improvement to add a RLC in parallel, especially with an high Z output amplifier?
From the datasheet, the Fane 15, 5.5ohms-13mH-850uF could be tried to tame the Fs impedance.
Or the same result can be achieved with a DSP/EQ?
Does it worth it?
Rather depends on the design context: except under the same conditions as the original measurement was taken or on a baffle (sometimes not then either), the LF impedance characterisitc will change as it's affected by enclosure load. Variations can be useful; Joe uses one with the Elsinore to flatten the upper vented box impedance peak -others, self included have done the same in various designs. I don't think many have done so for a free-air or equivalent however.
DSP doesn't change the electrical impedance of the driver / speaker system load, it 'merely' manipulates the input signal.
DSP doesn't change the electrical impedance of the driver / speaker system load, it 'merely' manipulates the input signal.
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Yes, first measure in the enclosure, that's logical.
Thinking of a 100-150L box more or less "boffle" (open back) and maybe a little bit FLH too, not sure.
Does the RLC tends to upset some amplifiers?
Thinking of a 100-150L box more or less "boffle" (open back) and maybe a little bit FLH too, not sure.
Does the RLC tends to upset some amplifiers?
Well, put it this way: it's there to lower impedance. Therefore, you need to make sure you tune it to the right frequency (i.e. that of a peak), because if you mistune, you could end up with an extremely low impedance at that point.
Thank you.
So, to start:
1) measure impedance speaker in enclosure
2) calculate inductor required
3) measure again
4) adjust inductance if needed
Ferrit DrumCore Coil is ok for this purpose? I've read that ferrite coils sounds inferior to aircore, is it the usual audio BS?
Ferrit DrumCore Coil Mundorf H100 12mH +-3%, 56x35mm
So, to start:
1) measure impedance speaker in enclosure
2) calculate inductor required
3) measure again
4) adjust inductance if needed
Ferrit DrumCore Coil is ok for this purpose? I've read that ferrite coils sounds inferior to aircore, is it the usual audio BS?
Ferrit DrumCore Coil Mundorf H100 12mH +-3%, 56x35mm
that's a ("Series") impedance - notch circuit with 3 components in series with each other "across the driver" - useful with odd order passive highpass filters to limit interaction effects of capacitor reactance vs. a driver or system's Z-peak.
the ("Parallel") case with R-C-L elements in parallel with each other and the composite filter in series with the driver is used tame frequency response peaks by presenting a high impedance at a specific center of frequency.
Measurements are your friend.
the ("Parallel") case with R-C-L elements in parallel with each other and the composite filter in series with the driver is used tame frequency response peaks by presenting a high impedance at a specific center of frequency.
Measurements are your friend.