Need guidance, first spkr plans.

Seyeklopz · 02:30 AM

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

PeteMcK · 29th October 2010, 03:19 AM

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.

tinitus · 29th October 2010, 03:40 AM

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

sreten · 29th October 2010, 01:10 PM

Hi,

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

rgds, sreten.

undefinition
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

Seyeklopz · 29th October 2010, 05:11 PM

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..

29th October 2010, 02:02 AM	#1
Seyeklopz diyAudio Member Join Date: Oct 2010	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 02:30 AM.

29th October 2010, 03:19 AM	#2
PeteMcK diyAudio Member Join Date: Feb 2002 Location: 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. __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

29th October 2010, 01:10 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Checkout the info on small drivers on Zaphs site, and small tweeters. rgds, sreten. undefinition 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 __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

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29th October 2010, 03:40 AM	#3
tinitus diyAudio Moderator Join Date: Nov 2005	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

29th October 2010, 05:11 PM	#5
Seyeklopz diyAudio Member Join Date: Oct 2010	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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