3.5 @ 35htz Design Help

[n8skow 10+ year member]

Relatively steeper peak - yes, but to say less output is a bit of an overgeneralization. There are several 15's that would be plenty happy in 3.5 cubes (woofers with high qts and low FS). The enclosure sizes you are throwing around sound like you are referring to a 'specific' woofer though - (after reading over the thread again - there's been no mention of what the OP is using...)

Smaller box = less output and steeper peak. 3.5 is generally MINIMUM for most 15's and IMO

 

[hispls 5,000+ posts]

Relatively steeper peak - yes, but to say less output is a bit of an overgeneralization. There are several 15's that would be plenty happy in 3.5 cubes (woofers with high qts and low FS). The enclosure sizes you are throwing around sound like you are referring to a 'specific' woofer though - (after reading over the thread again - there's been no mention of what the OP is using...)

List off a few 15's that do better in 3.5 cube than at 4.5. If OP is asking, chances are the box won't be big enough. I've used some 15's in boxes that small and in larger boxes and they're invariably louder and have a wider bandwidth than in the smaller boxes.

 

[RangerDangerV2 5,000+ posts]

List off a few 15's that do better in 3.5 cube than at 4.5. If OP is asking, chances are the box won't be big enough. I've used some 15's in boxes that small and in larger boxes and they're invariably louder and have a wider bandwidth than in the smaller boxes.

nsv2, IA warden, IA dp, cascade omega

 

[OldManBass]

nsv2, IA warden, IA dp, cascade omega

Hmm... IA told me their subs liked boxes on the larger end of the spectrum...

 

[RangerDangerV2 5,000+ posts]

Hmm... IA told me their subs liked boxes on the larger end of the spectrum...

they work great in 3.5. the 15s that is.

 

[Dirtrider4eva 10+ year member]

Op if you want a design for your sub pm me and ill handle it all..

 

[RangerDangerV2 5,000+ posts]

Op if you want a design for your sub pm me and ill handle it all..

inb4129.9

 

[n8skow 10+ year member]

I assume you are being facetious for the point of continuing this argument, but if you are actually looking for a few:

Z series or NS series from Sundown, Mojo's from Memphis, SSA DCON's, Fi Q, JL w3's and w6's...

My point was there has been no mention anywhere of the woofer in question - and just throwing out enclosure specs is a waste of time without knowing what speaker we are talking about building for here.

@RedDiamond - please enlighten us...

List off a few 15's that do better in 3.5 cube than at 4.5. If OP is asking, chances are the box won't be big enough. I've used some 15's in boxes that small and in larger boxes and they're invariably louder and have a wider bandwidth than in the smaller boxes.

 

[RedDiamond 10+ year member]

Sorry, I guess I forgot to mention the speaker. It is a SEX15D2, the reccomended specs were between 3-4 cu ft - 34-35hz. I was just going by the reccomended because I couldn't find any information on what's better for that paticular speaker.

 

[-BenBen- 10+ year member]

i like 4-4.5 cu for a 15.. jmo

 

[n8skow 10+ year member]

version 1 or 2?

Sorry, I guess I forgot to mention the speaker. It is a SEX15D2, the reccomended specs were between 3-4 cu ft - 34-35hz. I was just going by the reccomended because I couldn't find any information on what's better for that paticular speaker.

 

[RedDiamond 10+ year member]

version 1 or 2?

V1 I believe.

 

[n8skow 10+ year member]

Do you happen to have the T/S specs for it?

They have the SRX info listed for the *** on the website, lol.

V1 I believe.

 

[RedDiamond 10+ year member]

Do you happen to have the T/S specs for it?They have the SRX info listed for the *** on the website, lol.

Yea I saw that too, though I do not..

 

[RedDiamond 10+ year member]

Do you happen to have the T/S specs for it?They have the SRX info listed for the *** on the website, lol.

Boom..

*** 15" T/S Parameters:

•Electrical Q Value (Qes): 0.55

•Mechanical Q Value (Qms): 4.3

•Total Speaker Q Value (Qts): 0.49

•Free Air Resonance (Fs): 22 Hz

•Equivalent Compliance (Vas): 209 liters

•One-Way, Linear Excursion (Xmax): 18 mm

•Efficiency (SPL 1W/1m): 88 dB SPL

•Effective Piston Area (Sd): 810 cm2

•DC Resistance (Re): 2.8 ohm

•Nominal Impedance (Znom): Dual 2 ohm

•Thermal Power Handling (Pe): 600 W

•Force Factor (Bl): 17.7