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tunerguy1000
Member
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Type X Box Design
Ok so iv picked up a 12" Alpine Type X sub to replace my comps in my buick. I was looking at having the box for this sub ported so i can get lots and lots of bass. I wanna try to be the car you hear a couple blocks away down the road. Alpine's box specs seem way to small for this sub. Other people have boxes as big as 3 cubic feet with a port tuned to 32hz. I think 3 cubic feet is getting to be too big for the sub, but idk because it seems to work well for them. What do you guys reccomend?
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 11-15-2009 12:07 PM |
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sicaudio
Senior Member
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most people put the type r subs in 2.5-4 cf per sub, 3cf for an X is small IMO. especially if you want it tuned so low, 34-36 is where they shine!
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| 11-15-2009 01:45 PM |
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tunerguy1000
Member
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RE:
quote:
Originally posted on 11-15-2009 by sicaudio
most people put the type r subs in 2.5-4 cf per sub, 3cf for an X is small IMO. especially if you want it tuned so low, 34-36 is where they shine!
alright Sic work your magic for me lol How big should this box be? Where should I have the port facing? (I'm assuming just toward the trunk) and will 34-36hz be a good tuning for my subs? Because i wanna be able to hit the lows real nice. lol
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| 11-15-2009 06:05 PM |
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sicaudio
Senior Member
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3.5 gross internal tuned at 36 ( fs is only 28 so any lower risks damaging the subs suspension!! ) if the box is 16 tall the port would be 14.5 x 2.5 x 15.25 deep. should hammer the lows all the way to 28 pretty loud and start to peak at 44 all the way upto 76 extremely loudly ( between 4 and 8 db rise !! ). set the x over at 80-90 hz and your set. 3 cf you start to lose some low end and it raises the f3 quite a bit. ( f3 is the -3db point where the freq is 1/2 as loud as the fb which is the tuning freq.)
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| 11-15-2009 07:20 PM |
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sicaudio
Senior Member
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in a trunk car put sub and port on the same face with the port all the way at 1 end and the sub at the other end for a long slot box. face it to the rear bumper. in a hatch try the port back and the sub up. in a truck do the sub forward and the port up.
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| 11-15-2009 07:21 PM |
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tunerguy1000
Member
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RE:
quote:
Originally posted on 11-15-2009 by sicaudio
3.5 gross internal tuned at 36 ( fs is only 28 so any lower risks damaging the subs suspension!! ) if the box is 16 tall the port would be 14.5 x 2.5 x 15.25 deep. should hammer the lows all the way to 28 pretty loud and start to peak at 44 all the way upto 76 extremely loudly ( between 4 and 8 db rise !! ). set the x over at 80-90 hz and your set. 3 cf you start to lose some low end and it raises the f3 quite a bit. ( f3 is the -3db point where the freq is 1/2 as loud as the fb which is the tuning freq.)
oh hot damn. lol thanks sic. alredy printed it out for reference. My friend says he will sell me a MTX 8500 Mono Block Class D amp for $80...i can't find it online and he says it puts out 1000rms at 2 ohms. Can you hlp me find this amp online so i can see more details?
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| 11-16-2009 05:19 PM |
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sicaudio
Senior Member
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the only thing i can find even close is the ta8502 but its a 2 channel amp that does 750rms x 1 at 2 ohms bridged. 8500 is a speaker model not an amp model. and 1000 rms for 80$ ??
i did find this tho:
http://www.mtx.com/caraudio/archive/thunder81000d.cfm
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| 11-16-2009 07:27 PM |
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tunerguy1000
Member
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RE:
quote:
Originally posted on 11-17-2009 by sicaudio
cool... i always did like their older amps..
never really had any expierence with MTX at all. He also said the RCA's jiggle around a little bit but a piece of styrofoam keeps them in place. Would this effect the perfromance of the amp at all?
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| 11-18-2009 07:26 PM |
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tunerguy1000
Member
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Dimmensions
quote:
Originally posted on 11-18-2009 by sicaudio
not as long as they dont ground out, and so long as it isnt too bad.
ok cool. So can you give me the dimmensions of the box? (height, depth, length) and dimmensions and specs of the port? i'd like everything written out, it'l be easier on me so i can print it out all at once
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| 11-20-2009 07:22 PM |
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sicaudio
Senior Member
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send me anemail and i will do an xps cut sheet so you know how big to cut each piece of wood, you will need to deduct the port width from the length of the face but thats it.
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| 11-20-2009 07:29 PM |
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