General SPL General discussion of Sound Pressure Level topics.

which for better spl

Old 11-18-2010, 03:45 PM
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which for better spl

Hey all

I am planning a system for my truck (my last one fell through due to dealer mess up) and I am wondering what I shold do with the subs. I am torn between running either 2 or 4 drivers but here is the kicker regardless of the number of drivers I will still be running a pair of 5 ch amps with 1000 watt mono blocks in them for the subs. So if I run 2 subs they will get 1000 watts each and if I run 4 they will get 500 each. I can get the subs in dual 2 or 4 ohm so the power will be the same. The subs I am looking at are 600 rms and 1000 peak I know 500 is a little low but it should still do the job.

I know more subs makes more spl but I was not sure if the power would come into play. I am not sure what will sound better and I don't know if running 4 will really give me anything more or not. And yes I know that I am talking about 2 different comp levels but I don't plan on setting any records or anything

Any thoughts on this one?

Last edited by darklcd; 11-18-2010 at 03:49 PM.
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Old 11-18-2010, 03:50 PM
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What truck?? how much room do you have to work with?? What brand are your amps??
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Old 11-18-2010, 08:58 PM
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07 chevy avalanche. I am going take he midgate out and replace it with a sub box so I have lots of room. I am looking at a pair of hifonics ZXi60.4 + 1K amps to run everything.

I want to keep the box sealed though
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Old 11-19-2010, 01:35 AM
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Your title says "What would be better for SPL" and yet you wanna build a -3db sealed box?
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Old 11-19-2010, 06:22 AM
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use 2 12's, with more driver you can encounter more problems
if you have the room, i would suggest a bandpass like box. Build the initial box in the cab and seal it off, then build the sub box and play around with positioning inside the cab box
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Old 11-19-2010, 02:16 PM
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Like Sinemeup said, if you're looking for SPL, a sealed encsloure is not the way to go.
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Old 11-21-2010, 10:24 AM
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go ported
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Old 11-23-2010, 02:56 PM
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I am still torn on box design I know ported is louder my main question is the number of subs. what would be better 2 with 1000 rms each or 4 with 500 rms each. I am not sure if I should go for cone area of over all power.

thats my main issue.
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Old 11-23-2010, 02:59 PM
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Well if you have the room, do 4 subs in a ported box.

With the same power in a proper enclosure it's going to be louder than 2 subwoofers on the same power.
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Old 11-24-2010, 05:59 PM
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I kinda thought that might be the case but I wasn't sure. So if I can swing it 4 subs will be louder then 2 even with double the power at least thats the plan in theory lol
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