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Reload Thread: Port back vs up: The horse is still alive.

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    gckless's Avatar
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    Port back vs up: The horse is still alive.

    Doing two 15's (built by Zeuslicious, 15" Modded 3hp Sub w/Green Ti Basket, Long Beefy Coil, TC Spaced Spiders, DD CF Cap!!) in a Blazer. Comparing sub up/port back to sub up/port up. Couple questions. Slot would be about a 4"x35.5" port, for a tuning of 30Hz. Not sure on port WxH relationship, my numbers may very well be off.

    For port back, how far from the rear hatch would the box need to be? I have heard double the port height. Space is somewhat limited, so I need as much as I can get. How does space needed between the box and the hatch compare in a slot vs. aeros?

    For port up, the box would be butted up against the rear hatch, like this:



    How would this sound vs. port back? I'm looking for it to sound good, meaning minimizing rattles, no cancellation issues, digging deep, etc. Not too worried about it being loud, I'm not chasing numbers and it should get loud enough either way. I want it to sound as good as possible.

    @Buck @double 07 @pro-rabbit @TaylorFade
    Last edited by gckless; 02-07-2013 at 10:29 AM.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer




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    Re: Port back vs up: The horse is still alive.

    It will sound just fine, you just have to tune differently is all. That setup pictured would be louder with port back in 99% of most cases though(to the ear and meter).




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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by pro-rabbit View Post
    It will sound just fine, you just have to tune differently is all. That setup pictured would be louder with port back in 99% of most cases though(to the ear and meter).
    This, all day, every day.

    Port back and you will have a great little wind machine.



    Stupid Loud.

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    Re: Port back vs up: The horse is still alive.

    Agreed. I would do port up as pictured.




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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by brandon_s0854 View Post
    Agreed. I would do port up as pictured.
    You just said agreed, then disagreed w/ both of us



    Stupid Loud.

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    Re: Port back vs up: The horse is still alive.

    I totally agree with the other guys....port back seems to play quite loud and if tuned correctly will slam the lows like nobodys business......If will not sound bad either way but if it was mine I would do port back....




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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by wickedwitt View Post
    You just said agreed, then disagreed w/ both of us
    My bad. Sometimes I think one thing and type another!




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    Re: Port back vs up: The horse is still alive.

    Hmmm, alright. Will make fitting the size box in there I want a little difficult, and I'll have to deaden the crap out of the hatch, but thanks for the input. Looks like port back is the way to go.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by gckless View Post
    Hmmm, alright. Will make fitting the size box in there I want a little difficult, and I'll have to deaden the crap out of the hatch, but thanks for the input. Looks like port back is the way to go.
    Get you some sheet metal and weld it to the hatch. Problem solved.


    Otherwise, 2-3 layers of deadner.



    Stupid Loud.

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    Re: Port back vs up: The horse is still alive.

    I've had better luck getting loud in my Jeep porting to the side (into a corner is optimum on the meter). My best sounding box to date ported up (but on a side). Many people seem to have good luck firing to the rear though.

    The only way to know for sure is to buy a meter, build both boxes, and experiment with position and aiming. Way too many variables to guess if someone doesn't have the exact same gear in the exact same ride and has already tested all options.




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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by hispls View Post
    I've had better luck getting loud in my Jeep porting to the side (into a corner is optimum on the meter). My best sounding box to date ported up (but on a side). Many people seem to have good luck firing to the rear though.

    The only way to know for sure is to buy a meter, build both boxes, and experiment with position and aiming. Way too many variables to guess if someone doesn't have the exact same gear in the exact same ride and has already tested all options.
    PR has the exact same vehicle
    Don't know how much testing he's done though.

    What Jeep do you have?



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

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    Re: Port back vs up: The horse is still alive.

    what about in a s10 extended cab..is that the 1% rabbit..lol




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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by tdford5 View Post
    what about in a s10 extended cab..is that the 1% rabbit..lol
    Well we are talking about blazers here lol...

    If you fire your port back in a S10...well you have other issues




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    Re: Port back vs up: The horse is still alive.

    Only experience I have with this is my durango. Had slot port up like pictured doing 149's. Ended up switching to three 6" aeros facing back, about 4"-6" from the hatch and did 152.8 sealed. Only thing thatchanged was the port, that was an 18" BTL on a DD Z1. Could have done better too as that was just dropped in, no testing at all and it was actually oozing glue cuz I literally built the box on the back on the way to the competition.




    Refs: http://www.caraudio.com/forum/buyer-seller-feedback/454340-k_schutte-feedback-2.html

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    Re: Port back vs up: The horse is still alive.

    Quote Originally Posted by k_schutte View Post
    Only experience I have with this is my durango. Had slot port up like pictured doing 149's. Ended up switching to three 6" aeros facing back, about 4"-6" from the hatch and did 152.8 sealed. Only thing thatchanged was the port, that was an 18" BTL on a DD Z1. Could have done better too as that was just dropped in, no testing at all and it was actually oozing glue cuz I literally built the box on the back on the way to the competition.
    Wow, good to know. How did each way sound on music though, or were you only doing burps? It's my DD, so I want it to sound as good as possible.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

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