And then there's the LPH8045, three 1:1 sections, no leakage-inductance spec, or HV rating spec. Likely and honest trifilar part. Gotta get some and measure the winding-winding capacitances.
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Thanks,
- Win
The drive units already have the resistance of their windings effectively in series with the signal, so any extra resistance would have to be significant compared with the DC resistance of the windings before it made any difference.
HOWEVER..... Most loudspeakes have multiple drive units in boxes with crossover networks and it is the crossover networks which play havoc when the impedance between them and the amplifier changes. If they rely on a low impedance drive circuit for damping, any extra resistance in the wires will cause disproportionately large changes in the frequency response.
Some cheap crossover networks have poor quality inductors which measure fine on a bridge at low signal levels but which saturate when presented with realistic loudspeaker levels. That can cause huge variations in amplifier loading throughout each cycle of the waveform and could cause very audible distortion if the wiring resistance were too high.
The solution to this has been known for a long time: active crossovers and one amplifier per drive unit (all contained within the speker cabinet and fed at 'line' level (balanced 0dBm professionally or unbalanced -12 dB for domestic equipment).
-- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk
It's only possible to connect to the surface of the wire, you could connect to the centre of the end of the wire, but it's still a surface connection, and skin effect will still push the same amount of current to the sirface.
yeah, the difference between 100 milliohms at 20Hz and 130 at 20kHz in the speaker wire won't cause much distortion.
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Can you make a mixer with a saturable core reactor?
Mikek
In either sense of the word, yes.
NT
Years ago, I worked with a fellow that tried to cut and modify some ferrite toroids to make one. We never got mixing with it.
Mikek
Which sort of mixing? What problem did you run into?
NT
Sorry, to many years ago. I do recall heat, we put the ferrite in an oil bath. Probably the wrong ferrite.
Mikek
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