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  • Capacitors

    What brand capacitors do you use in the crossovers for the ARX speakers?

    Thanks,
    Don

  • #2
    Originally posted by dvenardos
    What brand capacitors do you use in the crossovers for the ARX speakers?

    Thanks,
    Don
    Yes, I would be interested in knowing this, too.

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    • #3
      We use the top two grades of polypropylene caps from what I believe is the largest OEM supplier in Asia.

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      • #4
        Thanks, Jon. Would you be able to tell us, where does the planar start to take over from the woofer?

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        • #5
          Originally posted by tesseract
          Thanks, Jon. Would you be able to tell us, where does the planar start to take over from the woofer?
          In all model's cases, right about 2200Hz, 4th order.

          ----

          PS: Crossover points and rates of attenuation are more or less dictated by the combination(s) of raw driver responses, and can't easily be shoehorned into textbook configurations. I add this because sometimes we all assume crossover points and types can be placed arbitrarily and/or selected from a list.

          You actually have to select the drivers' raw responses with a sense of what kind of system you want to make, at least if you're going to build a simple, elegant design and not need a dozen or more parts to force any two random drivers into two complimenting, standard responses.

          Arx crossovers are simple, average only 6 parts, and the points are set by the drivers - they fit well where they are and we have added flexibility in tuning treble tilt and midrange damping. The rates are selected to approximate a classic tuning with reasonable power control too.

          We spend quite a bit of time in trial crossover design, but we finally ended up at about halfway between 2kHz and 2.5kHz - typical 25mm tweeter points. The first part of the slopes are also overdamped a touch for good dynamic control (especially when a $300 or $500 speaker is driven hard by a $300 or $500 AVR). You can lean on these designs a bit and not have them get shattered sounding.

          This comment came in this morning:

          The planer magnetic tweeters are very smooth but extended,and most importantly integrated, in Jons application they sound like a good 25mm softdome with non grating extension not extension with the drawback of most metal domes. The Arx is a very neutral speaker with a very clean and fast sound without being fatiguing or overly warm...
          I think the non-fatiguing part speaks to the filter design choices.

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