casperskafs
Clamped my amp in my daily driver.

Hifonics Thor 3000 Watt Amp
1. 15 Inch Rare Old School Ground Zero Sub.
6 Ohm SVC

DMM: Volts AC 077 + and - Speaker Leads
Clamp: Amps 5.02 + Speaker Lead Only

Took 77x5.02 = 386 Watts @ 6 ohms

Burped @ 57hz

Running a single 6 ohm sub. I know its weird. Anyway if I divide them I get 15 Ohms on box rise
Is this correct? Or did I do it wrong cause thats a crazy box rise.
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Alemuthafukinjandro
Sounds about right. That would be 2.5 times box rise. If you were running a 1 ohm sub with that box rise you would end up at 2.5 ohms.
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Team DD Belgium - Dieter
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Originally posted by Alemuthafukinjandro:
Sounds about right. That would be 2.5 times box rise. If you were running a 1 ohm sub with that box rise you would end up at 2.5 ohms.
Completely correct
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casperskafs
Thats crazy!!! Any tips on reducing box rise?

My box is tuned to 47hz if I remember right. For some reason i can't remember right now. I use 1 6 inch aero. Nothing special about the box. No 45's or anything. Just kind of something I threw together. I face forward half as* sealed off from the trunk.

Thanks for the response guys
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bland1
Are you happy with the way it sounds? If it's loud enough, who cares how much actual power it is making. If you are looking for more get a different sub that you can wire lower. Starting at 6 ohms your already limiting your power. As you make more power, your rise will be less.
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AmmoJammo
this is why I've always liked running my amps at half their rated impedance, assuming they don't just stay in protect

minimum impedance rise I've seen is about 1.5x
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casperskafs
Quote:
Originally posted by bland1:
Are you happy with the way it sounds? If it's loud enough, who cares how much actual power it is making. If you are looking for more get a different sub that you can wire lower. Starting at 6 ohms your already limiting your power. As you make more power, your rise will be less.
I kinda just ask for future references. I compete with my daily driver for a points chaser. I'm always changing what equipment is in it. Since i'm always changing boxes and subs I just wondered if there were any tips on reducing box rise for future builds. Kinda just using the equipment above for an example. Also I just started clamping so I don't know much about box rise. Always looking to improve.
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bland1
Box rise is a tricky subject. There's no actual proven changes to be made that will reduce it, or make it rise more. Only way is to test, and see what's happening.
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casperskafs
I heard yesterday from someone I trust very well (jeff rowland) that bracing the box maybe adding resin or more resin and also rounding corners can help
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bland1
That's the thing. I've heard adding resin makes a box have a little more rise, but your score should still go up cause it's more solid.

The advantage of knowing your rise is you can then wire down your amp with a lower impedance if you have enough.
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AmmoJammo
oh, I know what will reduce rise!

freezing the woofers...
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casperskafs
Quote:
Originally posted by AmmoJammo:
oh, I know what will reduce rise!

freezing the woofers...
What?
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Tinted
play with box sizes. make it smaller.
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