Im making a very basic MTM center speaker. Using Two 4ohm 6.5" midrange in series with an 8ohm tweeter. two questions
1) 1st order low pass I assume I treat the pair of 4ohm mids in series as a single 8ohm woofer?
ie: single 0.2mh inductor before the 2 mids in series. for ~6300hz cross (not a 0.1mh before each woofer)
2)For design Its being built into the tv stand.
I have upto 26" width, 13" height, 18" depth for the center. Should the tweeter go above the mids, or tweeter mounted inline as high as possible?
1) 1st order low pass I assume I treat the pair of 4ohm mids in series as a single 8ohm woofer?
ie: single 0.2mh inductor before the 2 mids in series. for ~6300hz cross (not a 0.1mh before each woofer)
2)For design Its being built into the tv stand.
I have upto 26" width, 13" height, 18" depth for the center. Should the tweeter go above the mids, or tweeter mounted inline as high as possible?
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Hmm, ~13543/6300 = 2.15"/5.46 cm is ideally way too high an XO point even with the woofers jammed together unless the listening position is relatively far away. Jammed together the accepted 1 WL max XO point = ~13543/6.5 = ~2083 Hz, so the typical 2 kHz for most tweeters.
yes
IIRC, odd orders tilt the tweeter down relative to the woofer(s), so above/below depends on what ear height you want.
yes
IIRC, odd orders tilt the tweeter down relative to the woofer(s), so above/below depends on what ear height you want.
I wasn't asking for an XO recommendation it's gotta be 6k, but since you mentioned it...
Is 2khz typical for a tweeters? I'm using parts from a few dozen old old salvaged speakers. AFAIK all but one have 5-7khz HPF. (I tossed a lot of the 8ohm tweeters, kept their capacitors, all 2.2uf)
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I'm aware, just showing how far away 6 kHz is from the default max spacing.
Yes, for quite awhile now, though in recent years there's been a shift to smaller, higher freq. ones presumably due to the increasing impact of mobile audio on the rest of us.
A 2.2 uF/~8 ohm high pass = ~9 - 10 kHz/1st order depending on the driver's Re.
Yes, for quite awhile now, though in recent years there's been a shift to smaller, higher freq. ones presumably due to the increasing impact of mobile audio on the rest of us.
A 2.2 uF/~8 ohm high pass = ~9 - 10 kHz/1st order depending on the driver's Re.
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The speakers I could trace are 12-35 years old.
The tweeter I was building this around is from a 3 way tower. XO @ 6k & 2.5 (3" tweeter, 4" MR. 12" woofer). Maybe Ill try keeping the 2 smaller drivers, and swap the 12" for a 6.5" or 5" . Id be able to keep them vertical, and spaced as they are now, maybe able to get away with using most of the existing XO