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My Volvo Speaker says 4 ohm, why does everyone say 8 ohm?

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Re: My Volvo Speaker says 4 ohm, why does everyone say 8 ohm?

Post by mrbrian200 » Fri Sep 14, 2018 12:24 pm

The D pillar speakers don't produce much bass anyway, you could devise a crossover to control the impedance (bass blocking capacitor in line with the D-pillar speakers, inductance coil in line with the door speakers). 1khz/1st order is probably a good for this: you would use a 0.64 mh audio grade air core inductance coil in line with the 4 ohm door speakers. For the 8 ohm pillar speakers, an audio grade non-polar 19uf capacitor. The exact values may not be available, just order the closest.

You're talkin a little over $5/coil and less than a dollar per capacitor + shipping from www.earseaudio.com

You're kind of wasting the tweeter in the door speakers if they're a coax type. If the pillar speakers are a coax type, I recommend bypassing the tweeter input to be in front of the cap you're adding (don't bypass the little cap in line with the tweeter that's part of the speaker assembly) to keep the highs cleaner. Stacked passive electrolytics in series tend to result in a shrill/unnatural sound in the high frequency range which is why more expensive film-foil type caps are often used in more elaborate 3rd/4th order crossover designs for the tweeter, but not usually deemed necessary for the midrange/woofer.

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