3.5 @ 35htz Design Help

[RedDiamond 10+ year member]

Would anyone be able to help me with this design? It's for a single 15". I need it 3.5 @ 35htz, and no more than 19" in depth. All the designs I have found, have either been taken down, or are poorly made. If anyone could help me, that would be great, thanks.

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[hispls 5,000+ posts]

You shouldn't be planning on running a 15 tuned to 35hz if you don't have about 9 cube gross to work with. It's too small for a 15" and too small to tune that low with adequate port area without taking up a lot of volume.

 

[Silverado SS 10+ year member]

Should be able to find one here

*OFFICIAL* Free Ported Box Plans (56k NO!!) - SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum

 

[RedDiamond 10+ year member]

You shouldn't be planning on running a 15 tuned to 35hz if you don't have about 9 cube gross to work with. It's too small for a 15" and too small to tune that low with adequate port area without taking up a lot of volume.

I'm going by what is reccomended for the sub.

 

[RedDiamond 10+ year member]

Should be able to find one here*OFFICIAL* Free Ported Box Plans (56k NO!!) - SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum

Thanks Silverado, but the closest they have on there is 3.5 @ 32htz.

 

[hispls 5,000+ posts]

I'm going by what is reccomended for the sub.

Cool. Stop back and give us some Termlab scores or an RTA graph.

 

[n8skow 10+ year member]

9 cubes?!

It's a single 15...

You shouldn't be planning on running a 15 tuned to 35hz if you don't have about 9 cube gross to work with. It's too small for a 15" and too small to tune that low with adequate port area without taking up a lot of volume.

 

[RangerDangerV2 5,000+ posts]

You shouldn't be planning on running a 15 tuned to 35hz if you don't have about 9 cube gross to work with. It's too small for a 15" and too small to tune that low with adequate port area without taking up a lot of volume.

I disagree.

 

[PSturmer 10+ year member]

RE AUDIO - Box Calculator

 

[n8skow 10+ year member]

RE's box calculator would be a good example of one 'not' to use...

It's results are not accurate.

 

[hispls 5,000+ posts]

9 cubes?!It's a single 15...

OK, that may be a little high, but consider about 2.5 cube for wood and bracing, .25-.4 cube for sub, then 1-2 cube for port. Whatever. Personally if I only had 3.5 cube to work with I'd be using a 12.

 

[RangerDangerV2 5,000+ posts]

OK, that may be a little high, but consider about 2.5 cube for wood and bracing, .25-.4 cube for sub, then 1-2 cube for port. Whatever. Personally if I only had 3.5 cube to work with I'd be using a 12.

op is talking about net vol im assuming.

 

[hispls 5,000+ posts]

op is talking about net vol im assuming.

In 3.5 net I'd be on the fence between 10 and 12" In testing in 3.5 cube I meter higher with a 10 in the same box (same motor, softparts)..... of course excursion becomes a problem outside of tuning so I'd possibly do a 12 depending how much power was on tap.

 

[RangerDangerV2 5,000+ posts]

In 3.5 net I'd be on the fence between 10 and 12" In testing in 3.5 cube I meter higher with a 10 in the same box (same motor, softparts)..... of course excursion becomes a problem outside of tuning so I'd possibly do a 12 depending how much power was on tap.

we do 53's on music with 3.5 per chamber with many different types of 15s here in MN in a little red ranger.. 3.5 IMO is optimal for most 15s.

3

 

[hispls 5,000+ posts]

we do 53's on music with 3.5 per chamber with many different types of 15s here in MN in a little red ranger.. 3.5 IMO is optimal for most 15s.3

I'm sure that same vehicle would do the same numbers with 12's in the same box then. Smaller box = less output and steeper peak. 3.5 is generally MINIMUM for most 15's and IMO most manufacturers only just say that because people have their heart set on big subs to impress their buddies and won't know any better when the see the "recommended" specs. Kicker "recommends" 6 cube for solo X 18. Give that a whirl and let me know how that plays out.