I'm finishing my 3 way project I only need to do the xover for the woofer SB Acoustic SB 23NRSX45-8 here
http://www.diyaudio.com/forums/full-range/228114-sb-8-inch-woofer-sounds-great-its-own-2.html
the advice is Low Pass = Linkwitz Riley 24db/octave at 300hz.
Link to previous 2 way http://www.diyaudio.com/forums/multi-way/236392-help-3-4-way-loudspeaker-5.html#post3565461
http://www.diyaudio.com/forums/full-range/228114-sb-8-inch-woofer-sounds-great-its-own-2.html
the advice is Low Pass = Linkwitz Riley 24db/octave at 300hz.
Link to previous 2 way http://www.diyaudio.com/forums/multi-way/236392-help-3-4-way-loudspeaker-5.html#post3565461
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Measurements
Attached measurements and pics of the loudspeaker.
Attached measurements and pics of the loudspeaker.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Attachments
![WP_20170308_001[1].jpg](/community/data/attachments/551/551008-49e9e4ae571de2aa694d6e423d785e3f.jpg)
![WP_20170308_003[1].jpg](/community/data/attachments/551/551020-11555f81550074de8e4a6470c4dbe11b.jpg)
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Impulse measurement.
An externally hosted image should be here but it was not working when we last tested it.
Well it seems finally got a good impulse response & frecuency response measurement. Measure in nearby field.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I got a quad of the 12-ohm version when they were on sale. Two of these wil fit very nicely in a 45-50 litre closed enclosure.
I'm skipping on some of the design work, and shamlessly steal the 49 litre enclosure from the David/Jericho watt/puppy clone, and just omit the bass reflex tube...
For bass reflex, this cabinet should do nicely with one of these woofers...
Johan-Kr
I'm skipping on some of the design work, and shamlessly steal the 49 litre enclosure from the David/Jericho watt/puppy clone, and just omit the bass reflex tube...
For bass reflex, this cabinet should do nicely with one of these woofers...
Johan-Kr
It is not ready yet. In addition it's just rough model to hear and measure. If i like the results there's a sense to build cabinets.
Impulse and frecuency response with 2,7mH inductor.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Notch just below 300 Hz and peak at 300 Hz indicate some sort of internal resonance. Worth investigating.
Box volume of 50 L or so should be enough, but 75 L is fine, too.
Otherwise, very good DIY project. Enjoy!
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Impulse and frecuency response with 4,2mH inductor for xover 300Hz.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
SBAcoustics-3WC
Troels Gravesen does a 3 way with that driver. It might be worth looking at.
Troels Gravesen does a 3 way with that driver. It might be worth looking at.
Finally decided the xover point to 250Hz. The two ways to be married with the woofer are midwoofer Scan Speak 18W8545-00 + Seas Millenium T25CF002 tweeter both filtered.
Two way filter Seas Millenium T25CF002 + Scan Speak 18W-8545-00
FR near field with filter connected tweeter & mid woofer
FR near field only mid woofer Scan Speak 18W-8545-00 with filter connected, n.b. phase inverted.
Two way filter Seas Millenium T25CF002 + Scan Speak 18W-8545-00
FR near field with filter connected tweeter & mid woofer
An externally hosted image should be here but it was not working when we last tested it.
FR near field only mid woofer Scan Speak 18W-8545-00 with filter connected, n.b. phase inverted.
An externally hosted image should be here but it was not working when we last tested it.
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- Status
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