help with box rise?

[brooklynjoy2008 10+ year member]

So I am planning on running 4 Alum12s sealed around 1.5cf each that will give me around .75 ohms, but how much box rise can I expect? I would like around 3000 rms and would like to stay as low as possible.

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[THATpurpleKUSH 5,000+ posts]

3k to all 4? Waste of equipment if you are running them sealed IMO. No way to tell impedance until you involve a clamp meter. What amp, what is the nominal ohm wiring, what vehicle, what freq are we talking about here? Merry christmas, Im kinda shitfaced not gonna lie lol

 

[brooklynjoy2008 10+ year member]

3k to all 4? Waste of equipment if you are running them sealed IMO. No way to tell impedance until you involve a clamp meter. What amp, what is the nominal ohm wiring, what vehicle, what freq are we talking about here? Merry christmas, Im kinda shitfaced not gonna lie lol.

LOL merry christmas to all spent most of the night dealing with "some assembly required" and $hit directions. Alcohol was involved and I was up up in them kush clouds so that didnt help speed things up.

Yes 3k to all 4 , I have one sealed in a 1 cf sealed and like it, can you predetermine sealed enclosure frequency? All 4 in parallel will give just under .75 ohm load. And I need to know more about box rise before I choose an amp.

 

[THATpurpleKUSH 5,000+ posts]

If you are wired to .75 on a 1ohm amp, you can usually get enough rise to make the amp stable. My subs are dvc4s and each wire to 1.55ohm in parallel, so I have .775ohms before rise going to my mono and its always worked fine. Box rise cannot be predetermined, only way is to clamp the amp and find out. Rise will be different for every freq. Put that sub in about 2 cubes ported in the low 30s, then you will really like it.

 

[wenn_du_weinst 10+ year member]

you need impedence rise to play music, you only want to get rid of it when your burping. Impedance rise is what allows you to play all freq evenly.

 

[Buck 5,000+ posts]

Why do you care about box rise if you are going sealed?

 

[brooklynjoy2008 10+ year member]

my ? about the rise is since there are 4 seperate boxes will I see alot of rise? And I dont want to port.

 

[Buck 5,000+ posts]

Can I get a link to the woofers?

 

[brooklynjoy2008 10+ year member]

Can I get a link to the woofers?

Audiobahn ALUM12N (ALUM-12N) 12" Dual 6 ohm Sound Q Subwoofer

 

[Falcons 5,000+ posts]

Bro with those woofers and a sealed box, don't even worry about it

 

[wenn_du_weinst 10+ year member]

with any box or any subs don't worry about it.

 

[Falcons 5,000+ posts]

Especially with a daily setup

 

[wenn_du_weinst 10+ year member]

if their wasn't impedence rise it would play very loudly at one point and quiet at all the rest. You need rise to overcome the efficiency at fs of a driver or the q of the box.

 

[oldschoolboomer 10+ year member]

As silly as those subs look, I had three of the ALUM10's a while back and they sounded good.

 

[mylows10 5,000+ posts]

with that small of a box per woofer, i'd say it won't be much of a rise .but it would still need to be clamped.