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Multi-Way Conventional loudspeakers with crossovers

Dayton DS315-8 12" woofer box
Dayton DS315-8 12" woofer box
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Old 17th May 2019, 06:03 AM   #21
albertli is offline albertli  Canada
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Gm,
Since the port 4"x 12.68", I have to turn the side as front. 3cu.ft will be 24"H x 13.5"W x 16"D I/D.
Can I make the port down firing? I have to raise the speakers 10" to a foot above the floor. If possible I can keep 16" as front baffle.
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Old 17th May 2019, 07:42 AM   #22
GM is offline GM  United States
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Yes, you can down fire the vent. 13.5" is too narrow for a 12", even 16" is near minimum and could put the vent on the side if you prefer.

GM
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Old 17th May 2019, 03:02 PM   #23
albertli is offline albertli  Canada
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Quote:
Originally Posted by GM View Post
Yes, you can down fire the vent. 13.5" is too narrow for a 12", even 16" is near minimum and could put the vent on the side if you prefer.

GM
Thanks GM. Green light is on. 😁
I'll post the crossing for advices.
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Old 17th May 2019, 10:42 PM   #24
LineSource is offline LineSource  United States
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Since the Synergy Horn is 22" wide, you can construct a 22" wide woofer cabinet for both a "clean" unified physical appearance and a lower frequency baffle step. 28" high and 12" deep should net a little over 3cuft.

Model a 3cuft ported cabinet with 3" diameter port 5.9" long tuned to 28Hz.

The distances to the rear and side walls will establish the total baffle step low bass effects.

Because your Synergy horn is very efficiency, it will require a large attenuation to blend with a single DS315-8 woofer.
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Old 17th May 2019, 10:51 PM   #25
albertli is offline albertli  Canada
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Quote:
Originally Posted by LineSource View Post
Since the Synergy Horn is 22" wide, you can construct a 22" wide woofer cabinet for both a "clean" unified physical appearance and a lower frequency baffle step. 28" high and 12" deep should net a little over 3cuft.

Model a 3cuft ported cabinet with 3" diameter port 5.9" long tuned to 28Hz.

The distances to the rear and side walls will establish the total baffle step low bass effects.

Because your Synergy horn is very efficiency, it will require a large attenuation to blend with a single DS315-8 woofer.
Thanks LineSource,
The size you provide is 3.3cu.ft. I like big box but can I use 4" port for I have that handy. I'm working on the crossover at 300hz with BW3 which actually is your design that I posted couple pages back. I think I am going to change some numbers to suit. Don't know it works or not but I'll post it for your comment.
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Old 18th May 2019, 02:12 AM   #26
GM is offline GM  United States
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Quote:
Originally Posted by LineSource View Post
Since the Synergy Horn is 22" wide, you can construct a 22" wide woofer cabinet for both a "clean" unified physical appearance and a lower frequency baffle step.

Model a 3cuft ported cabinet with 3" diameter port 5.9" long tuned to 28Hz.
I 'beat that drum' earlier to no avail...........

HR 'says' even a 4" is pretty marginal even at < rated power............

GM
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Old 18th May 2019, 03:14 AM   #27
albertli is offline albertli  Canada
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I try make up some simulations with the web program. Please advise which one is more suitable for my application and make corrections if need be.
Thanks
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