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18" FU 750 (First real build) How's this look?


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Posted

that sub would be better in a sealed box. if you go ported it will probably be really peaky.

It will work fine in a ported box.
Based on experience with sub or are you looking at parameters? i was looking at EBP of 36 which is pretty low.

Based on the parameters and how the modeled frequency response looked. EBP is an indicator, but is isn't everything.

Gotcha. Thanks.

Posted

Do you have a frequency diagram from the specs you suggested? Just curious.

Here ya go, this is 6 cu ft at 31 Hz. Please note this is raw output, cabin gain will boost the low end in the vehicle significantly.

biRSdU8.png

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Posted

Do you have a frequency diagram from the specs you suggested? Just curious.

Here ya go, this is 6 cu ft at 31 Hz. Please note this is raw output, cabin gain will boost the low end in the vehicle significantly.

biRSdU8.png

Cool. Thanks man.

Would 5.5' net look much different? (Sorry for so many questions)

Posted

A .5 reduction in box volume is only going to make a slight difference in output with a box this size. I can post a graph comparing the two for you when I get in from the field.

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Posted

A .5 reduction in box volume is only going to make a slight difference in output with a box this size. I can post a graph comparing the two for you when I get in from the field.

Any luck on this?

Posted

Sorry I forgot about it, here ya go:

Y9840ZQ.png

Green line is 6 cu ft, red line is 5.5. The difference in output would be inaudible.

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

  • 2 weeks later...
Posted

Still up in the air on design. Thinking of saving 50 bucks on the aero and just going slot ported.

Any opinions on this? 36Lx24Dx18H 26.5" port length. I did it at first with an L shape but the sub wouldn't fit under the L very well. So i am here:

Does this look like the proper length to tune to around 31 hz?

13592293_10154167583104718_1532725731318

Posted

Port length is calculated from the center-line of the port so that would be tuned lower if 26.5 would give you 31.

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