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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Not doing much until above 40kHz posted by neolith on February 8, 2012 at 15:13:40:
In some cases the poweramp sees a very low impedance at high frequencies, the red line of this diagram, dropping to 0.25 Ohm at 10 MHz:
http://www.lts.a.se/pub/artiklar/hogtalarkabel/karimp.gif
In can be cured by a suitable loudspeaker cable, one with a caracteristic impedance that matches well. A RC link at the end of the cable (or inside the speaker) and the amplifer sees the impedance of the blue line. Many amplifiers have a similar RC link (Zobel network) at their outputs.
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Follow Ups
- RE: Not doing much until above 40kHz - Roger Gustavsson 01:53:21 02/09/12 (1)
- RE: Not doing much until above 40kHz - neolith 05:27:06 02/09/12 (0)
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