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Subwoofer Box Help. Need an expert box builder!


Tjwubs34

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5 hours ago, Tjwubs34 said:

So I actually bought that amp off a guy and found out later it blew a MOSFET and was repaired which he failed to tell me when buying. He did play it on his subs and they were loud so I doubt its the amp.. A local builder said my port length is too long he did the math and it's suppose to be only 13" long not almost 32". So idk what to do honestly. I can try to seal the box better than I did but maybe only being wired to 2 ohm is my prpblem. Super frustrating 

They amp may very well still put out the proper amount of power, you just need to set you gain right.

 

The local builder who said your port should only be 13" long is wrong.  To tune a 4" x 14.5" port to 31 hz in a 4.4 cu ft box the port will need to be around 26" long.  A 13" long port will probably tune you closer to 38 Hz.  

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48 minutes ago, Triticum Agricolam said:

They amp may very well still put out the proper amount of power, you just need to set you gain right.

 

The local builder who said your port should only be 13" long is wrong.  To tune a 4" x 14.5" port to 31 hz in a 4.4 cu ft box the port will need to be around 26" long.  A 13" long port will probably tune you closer to 38 Hz.  

i contacted soundqubed and they said that it should be fine, there is a burn mark on the board and they said it looks like it only burnt the fiberglass.. So really i think this may be just a power issue.... and i dont think the sub likes 2 ohms.... but what is weird is the kid gave me a gain knob and it has a clip meter and the light blinks at half ohm at 2 ohms.... at quarter gain the sub hardly moves enough to produce small noises.....

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The light blinks at half ohm at two ohms? 

91 C350 Centurion conversion ( Four Door One Ton Bronco)

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the sub doesn't give a crap what load you wire it to. are you sure you're wiring everything correctly? can you put up some pictures of your sub and amp, to include wiring

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On 1/6/2017 at 11:44 PM, reedal said:

the sub doesn't give a crap what load you wire it to. are you sure you're wiring everything correctly? can you put up some pictures of your sub and amp, to include wiring

correct.  however the amp does. (i know you know that)  if he got a demo of the amp at 1 ohm and he is wiring it at 2 ohm now.  there will be a difference in power output by the amp.  thus part of his disappointment.

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37 minutes ago, neuspeedescort said:

correct.  however the amp does. (i know you know that)  if he got a demo of the amp at 1 ohm and he is wiring it at 2 ohm now.  there will be a difference in power output by the amp.  thus part of his disappointment.

I was referring to him saying "I don't think the sub likes 2 ohms". I agree that it is likely the issue in expectation vs reality though

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