quest for low bass


jonjon wompwomp

CarAudio.com Newbie
Aug 26, 2020
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0
Tacoma, WA.
besides the box, what is the determining factor/s for how low a subwoofer can play and still be
loud and clear? is it something mechanical, i.e. the coil size/lenght, motor force, cone area... or is it simply a combination of some or all of the above?
 

hispls

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Sep 10, 2009
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Central Maine
besides the box, what is the determining factor/s for how low a subwoofer can play and still be
loud and clear? is it something mechanical, i.e. the coil size/lenght, motor force, cone area... or is it simply a combination of some or all of the above?
Mostly box but to some degree mechanical limits can be a limiting factor. Keep in mind that everything that allows for higher excursion will sacrifice efficiency and after a certain point will gain you very little in potential for more output.
 

audioholic

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In a sealed enclosure or IB, linear excursion will be a limiting factor. In vented enclosures, excursion is minimized at or near tuning where the enclosure is it's most efficient, so thermal limits become more of a factor. But generally speaking, the enclosure itself, and the characteristics of the vehicle (like its transfer function) will be the biggest factors in perceived performance.
 

jonjon wompwomp

CarAudio.com Newbie
Aug 26, 2020
3
0
Tacoma, WA.
  • Thread Starter Thread Starter
  • #4
Kinda what I come up with as well. I figured the mechanical limits effect power handling more so than bandwidth... My inquiry stems from my experience with my new sundown 18" U series subwoofer. I am having trouble hitting that sweet spot of 28 to 32 Hz. Ive owned the D series, SA series, and the Z series... All of which seem to love those frequencies. I was thinking it was just the design of the driver with that steep surround and all. I have it in a 3.94 ft3 aero port box with a 6"single port at 28 in2 of port area. As it stands with displacement the enclosure is tuned to 30 Hz
I dont get it...
 

shredder2

CarAudio.com Elite VIP
Nov 19, 2017
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631
Az
sundown 18" U series I have it in a 3.94 ft3 aero port box with a 6"single port at 28 in2 of port area.
I dont get it...
single 6" aero?.. for an 18?

Id redesign and try an 8" aero next time... thats a hi-excursion sub and if you power it right it'll def hit port compression WAY too soon with a 6" imo.
My 30mm xmax 18 in 5.25ft3 or so uses a 10" and gets down tuned 34. (around 26"long)
23327

In 4 cubes a 8" is about right for your application if you ask me.
 

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