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Reload Thread: Mount 1 sub on top and 1 on side with port?

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    Goldenknob's Avatar
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    Icon32 Mount 1 sub on top and 1 on side with port?

    I'm building my second box and I was wanting to change it up a bit.. Would there be any problems or issues with mounting one sub on the top of my box and the other on the front side with the port? it's going in a 92 jeep cherokee. box is about 4sf. the front side will be facing the lift gate as usual.

    Anyone ever tried this?


    thanks.



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    Re: Mount 1 sub on top and 1 on side with port?

    i'de splitthe box into two chambers and use 2 ports.



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    Re: Mount 1 sub on top and 1 on side with port?

    you may have cancellation issues



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    Re: Mount 1 sub on top and 1 on side with port?

    THATS A BIG NO NO MAN!

    you will definitely have cancellation issues




    Quote Originally Posted by chillin View Post
    How do you bridge a mono?
    Quote Originally Posted by snoopdan View Post
    throw it off one.
    feedback thread:
    http://www.caraudio.com/forums/buyer-seller-feedback/402726-d-man1s-official-feedback-thread-2.html

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    Re: Mount 1 sub on top and 1 on side with port?

    Your description is a little vague about how you plan to do it, but there's often times nothing wrong w/ off axis firing. I've done it before and I've seen many other competitors do it w/ success.




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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by Lakota View Post
    Your description is a little vague about how you plan to do it, but there's often times nothing wrong w/ off axis firing. I've done it before and I've seen many other competitors do it w/ success.
    not me. haha

    like someone told me.


    you must experiment!




    Quote Originally Posted by chillin View Post
    How do you bridge a mono?
    Quote Originally Posted by snoopdan View Post
    throw it off one.
    feedback thread:
    http://www.caraudio.com/forums/buyer-seller-feedback/402726-d-man1s-official-feedback-thread-2.html

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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by Got Bass ? View Post
    you may have cancellation issues
    Beat me to it. You WILL have cancellation issues. Partly due to the waves and partly due to the magnetic pull. You don't want two magnetic energy fields that close at 90 degree angles to each other. While you'll avoid the waveform cancellation doing a separate chamber for each sub, you will need to get the subs as far away as possible and I doubt you'll get them far enough apart to avoid magnetic interference.



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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by Lakota View Post
    Your description is a little vague about how you plan to do it, but there's often times nothing wrong w/ off axis firing. I've done it before and I've seen many other competitors do it w/ success.

    x2 I've seen quite a few do things similar with great success. Give it a try



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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by o. l. t. View Post
    Beat me to it. You WILL have cancellation issues. Partly due to the waves and partly due to the magnetic pull. You don't want two magnetic energy fields that close at 90 degree angles to each other. While you'll avoid the waveform cancellation doing a separate chamber for each sub, you will need to get the subs as far away as possible and I doubt you'll get them far enough apart to avoid magnetic interference.


    You really should go to a dB drag comp and tell all the guys with the crx's in street classes that they're doing it wrong.

    Real life > theory

    I have been curious about off-axis firing myself, so I decided to give it a try and built this box. It did the exact same score as the other box I made that had box subs on the same axis. It did a 150 at the head rest and 151 + in the kick panel with 2 Type R 12's.




    Ben Hemp
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    Re: Mount 1 sub on top and 1 on side with port?

    Even a squirrel catches a nut every now and then. Consider your other box useless if it can't outperform that one.

    It did a 150 at the head rest and 151 + in the kick panel with 2 Type R 12's.
    Congrats, I did it 11 yrs in 1998 with (2) GSD12's and 1kw in tuned port boxes in an unsanctioned event that was practice for the IASCA DB Drags the next day with about 500 witnesses that probably still live in Chatt. I'd figure someone running 3kw would have figured out a way to be an 11 year old DB score on 1/3 the wattage, but running that box I can see why the limit has been reached.

    Next time try a less smart elic approach for a nicer response.



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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by o. l. t. View Post
    Even a squirrel catches a nut every now and then. Consider your other box useless if it can't outperform that one.



    Congrats, I did it 11 yrs in 1998 with (2) GSD12's and 1kw in tuned port boxes in an unsanctioned event that was practice for the IASCA DB Drags the next day. I'd figure someone running 3kw would have figured out a way to be an 11 year old DB score on 1/3 the wattage.
    those numbers 11 yrs ago are probably no where near where the new TL mic measures.



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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by 01 S 10 View Post
    those numbers 11 yrs ago are probably no where near where the new TL mic measures.
    I don't doubt there have been changes, but his approach lacked a little tact. A little personality goes a long way.

    I ran twice that night under a Coustic RTA tune. The truck consistently did high 140's on a KW which was pretty impressive for 1998. I actually still have one of the subs and box from that truck in storage. I'd love to meter it these days. A small change is to be expected, but not quite as dramatic as you'd say.

    As far as the box in question, There will be magnetic fields that cancel. Lakota claims to be an EE STUDENT, and I'm 8 yrs into my EE career so the young'un is bound to butt heads with the established. It's the natural part of life.



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    Re: Mount 1 sub on top and 1 on side with port?

    lol well thanks for the info.. I went ahead and built the box with both subs on the same side as the port. so it all faces the lift gate.. just thinking that I may want to lay something on the top of the box at some time, and if there was a sub up there it wouldn't be a good idea..

    thanks for the input.



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    Re: Mount 1 sub on top and 1 on side with port?

    Quote Originally Posted by o. l. t. View Post
    I don't doubt there have been changes, but his approach lacked a little tact. A little personality goes a long way.

    I ran twice that night under a Coustic RTA tune. The truck consistently did high 140's on a KW which was pretty impressive for 1998. I actually still have one of the subs and box from that truck in storage. I'd love to meter it these days. A small change is to be expected, but not quite as dramatic as you'd say.

    As far as the box in question, There will be magnetic fields that cancel. Lakota claims to be an EE STUDENT, and I'm 8 yrs into my EE career so the young'un is bound to butt heads with the established. It's the natural part of life.
    I wasn't trying to be an ***, it just bugs me when people give out false information. I've seen the setups of most of the loudest cars in NA dB Drag, thus it makes it easy for me to say what's true and what isn't for a lot of simple box theories. And the new meters are a lot harder than the old ones




    Ben Hemp
    1992 GMC Sonoma Ext Cab NEW BUILD
    2008 MECA S1 KY State Champion, 151.0 dB
    2008 MECA S1 WorldChampion, 151.8 dB
    2010 MECA scores: 150.9 dB S2, 151.6 dB S3
    Refs: smd4life, Subst4nce, wccoug21, dacheatham, thegreatestpenn, jshak07

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    Re: Mount 1 sub on top and 1 on side with port?

    I don't have pictures from last years dB Drag finals on my computer, but here's a CRX from the 2006 finals in Louisville, KY. 6 10's: 3 forward and 3 up.




    Ben Hemp
    1992 GMC Sonoma Ext Cab NEW BUILD
    2008 MECA S1 KY State Champion, 151.0 dB
    2008 MECA S1 WorldChampion, 151.8 dB
    2010 MECA scores: 150.9 dB S2, 151.6 dB S3
    Refs: smd4life, Subst4nce, wccoug21, dacheatham, thegreatestpenn, jshak07

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