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Multi-Way Conventional loudspeakers with crossovers

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Old 29th October 2010, 03:02 AM   #1
diyAudio Member
 
Join Date: Oct 2010
Red face Need guidance, first spkr plans.

Hey guys, I'm new here. May I say great site?

I designed this spherical 2.1 speaker set and I'd like some input on my choice of components and how to crossover.

Total component list.

4x Aurasound NS3-193-8A 3" Extended Range
https://www.madisound.com/store/prod...products_id=83
F3 of 85Hz: 2 to 3 liters sealed and stuffed

2x Fostex FT17H Horn Super Tweeter
https://www.madisound.com/store/prod...roducts_id=286

1x Peerless 835017 XXLS 12" Aluminum Cone 4 ohm
https://www.madisound.com/store/prod...oducts_id=8636
2.5 cubic foot box with a 3" diameter vent by 13" long for an F3 of 30Hz

As far as plans go, they will be hooked to a DC powered amp and dac, via toslink to my pc. I'm trying to find an automotive amp rated for 8ohm for the speakers and 4ohm sub. I want the sub to handle up to 100hz, mids from 100hz-5khz, tweeter 5k-25k.

OK guys, hack away

SPKR BALL.png
3rd rev, tweeter more inline with woofers
SPKR BALL v3.png

Last edited by Seyeklopz; 29th October 2010 at 03:30 AM.
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Old 29th October 2010, 04:19 AM   #2
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Join Date: Feb 2002
Location: Western Sydney
the supertweeter is way more efficent than the mids, not a good match;
for power handling and baffle step correction, I'd look at crossing your woofer over higher, how wide will your mids cabinet be? - this determines the baffle step freq.
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 29th October 2010, 04:40 AM   #3
tinitus is offline tinitus  Europe
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its sure a hell lot of work

might make more sense with better drivers
80db sensitivity is very low

maybe skip the MTM design
one good mid and one tweeter might give you a better chance
especially with the spherical mid design
best to have the tweeter slightly "behind" the mid, which would come natural with the spherical design
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Old 29th October 2010, 02:10 PM   #4
sreten is offline sreten  United Kingdom
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Join Date: Nov 2003
Location: Brighton UK
Hi,

Checkout the info on small drivers on Zaphs site, and small tweeters.

rgds, sreten.

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Zaph|Audio
FRD Consortium tools guide
RJB Audio Projects
Speaker Design Works
HTGuide Forum - A Guide to HTguide.com Completed Speaker Designs.
Humble Homemade Hifi
Click below to go to
Quarter Wavelength Loudspeaker Design
The Frugal-Horns Site -- High Performance, Low Cost DIY Horn Designs
Linkwitz Lab - Loudspeaker Design
Music and Design
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Old 29th October 2010, 06:11 PM   #5
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Thanks for the replies fellas. Doing some rethinking. How do you think a pair of lines of those woofers would sound? I'm thinking 9 per side arranged in a vertical arc for equidistance from my ears. Comb filtering shouldnt be an issue with a fixed listening position.

I've been flip-flopping between a multi-way / line design for weeks..
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