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Audio & StereoTechnical discussions about factory or aftermarket audio and video systems.
This is a discussion thread titled "sub woofer positioning question", within the Audio & Stereo forum, part of the Technical & Vehicle Assistance Forums category.
I was wondering if how the sub was positioned affects the sound and makes it better or worse? like if i made it down firing or facing the back trunk door? Also if i inverted the sub (so the woofer cone was facing into the enclosure) if that affects the bass? Im putting this into the back of a suv so i just wanted to know the best way to install it. Thanks!
Yes all the above will effect the sound output. The best way to tell w/c position/setup is to try them all, just move your box around and see whats best for your aplication. As far as inverting; I think people just do that to get more volume out of a box or show-off thier subs.
It really depends on what sounds best to you. I used to run my sub facing forward in the rear of my Sequoia, but I found that I much prefer it firing against the hatch, about 3 or 4 inches away.
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05 Sequoia 4x4 Ltd. Phantom Grey Pearl, Weld 20" wheels on Toyo tires, MagnaFlow cat-back, TRD air filter, Amsoil fluids, custom 15" overhead DVD system, Eclipse NAV system w/camera, Sirius tuner, DLS Nobelium components and coaxials, TRU 2-channel amp, 13" eD sub, eD Nine.1 amp, iPod hookup. SilverStar lamps.
you said you have a SUV, so from what i've read you should try facing it towards the back as close as you can. or up. either back or up should preload the sound waves up at the front where the driver is, to be exact up where the front window is. forward usually isn't the loudest. so i would try those before you try it forward or down. or better yet, face it forward then face it backwards up near the back,and see the difference. what kind of car do you have?
hmmm So from what it sounds its just car specific but usually when its facing the back it sounds better? well i am doing some sub placing right now and so far it been sounding pretty good a foot away from the trunk. If i make a new enclosure tho and change the volume of air would that affect the sound badly? right now the enclosure im using is .72 cubft from my other car. Is there anything else i need to take into account for when adding this sub?
Oh and the car i want to install it in is a Toyota Highlander 2002.
well what i would do in your situation is since you have the sub set up already in the smaller box use that to find out where it sounds best. just make sure that you sit in your drivers seat with all the doors shut when you determine where it is loudest. then after that change the box and put it in whatever way was loudest. changing the box will affect the way the subwoofer sounds and the power handling of the subwoofer. the loudest spot to place your subwoofer will always be the loudest spot. but changing things like box, amp, sub, wiring, power, will change how it sounds. i wouldn't invert them, its just more complicated and personally i don't like the way it looks. what sub, amp combo are you running. and how big is the box you are building now.
okayy, that makes sense, well i got two different subs i can use both 10" i got a: Polk Audio db10G and a alpine swe-1042 which the amp that i have to attach it to is a Blaupunkt THA275. if i everything goes to plan the box that im building should be .90 - .92 cbft. but i havent finished all the parts so i can change to volume if it should be smaller or larger
that alpine ten would be good in the size box you are going to build. as long as those are inside cube numbers and not outside.
one thing i would suggest though is that you get a different amp if you can. Baupunkt's aren't very good amp's and they are usually overrated. plus alpine subs are very power hungry.
hmm, i ended up just picking it up for 50 bucks at my local audio store. but yeahh i heard that from some other people too , what some good amps to pair up with these sorts of subs? hopefully not to break the bank ether.
i have to write an essay but maybe sometime tonight i can get to it. i need some questions answered though. is your alpine 4ohm or 2 ohm? is your polk 4ohm or 2 ohm? which sub would you prefer to use? and lastly what are you willing to spend on an amp?
well both the subs are 4 ohms, but right now i would prefer to use the polk sub becuase the alpine one has a dent on the cone so it dont look as good. but if the alpine sub would sound better i would use it. for an amp i would like to spend more abound $125-$150 but i can go up to $200-$225.
ok so i came to the realization that your polk audio subwoofer is single voice coil and your alpine subwoofer is dual voice coil. that means that your polk can only be wired to 4 ohms and your alpine can be wired to 2 ohms or 8ohms. so with that being said i have two choices of amps for you:
this amp will push 250 RMS to your polk and 500 RMS to you alpine if you wanted to use that instead. basically this means that if you ran your polk you would be fine but if you ran your alpine you would have to turn the amp down so that you don't blow it. turning your amp down is easy enough so it shouldn't be a problem.
this alpine amp will give your polk 300 RMS and your alpine 500 RMS. pretty much the same situation as before, turn your amp down a little so that they subs won't blow. again easy enough to do.
as for the box your building, look at the subwoofer recommendations for box size. remember that you have to take into consideration that the subwoofer displaces cubic feet. so when you think you have 1 ft3 after putting the sub in you may have 1.1 ft3
your polk is ideal at .66 cubic feet sealed. i could not find out how much the sub displaces but i would say it would be something like .08 or .06
so i would say build your box to .74 ft3. that should put it at or around the ideal cubic feet.
so duel voice coils can be wired in 2 and 8 ohms but not four and a single coil can be wired in 4 but not 8 or 2 ohms, got ya. well im prob going to get the alpine amp sometime within the next month hopefully if i get my next pay check soon. I was reading up on the recommended displacements and they give a range .65 to 1 , would it be better to keep it lower (like you said .74) or high to 1? or it dont really matter just as long as its within the range.
Sorry to keep asking questions, just trying to make sure i get it done right this time.
so duel voice coils can be wired in 2 and 8 ohms but not four and a single coil can be wired in 4 but not 8 or 2 ohms, got ya.
No quite. Dual 4 ohm coils can be wired to a 2 or 8 ohm final load. Dual 2 ohm coils can be wired to a 1 or 4 ohm load. A single 4 ohm coil is just that, 4 ohm.
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05 Sequoia 4x4 Ltd. Phantom Grey Pearl, Weld 20" wheels on Toyo tires, MagnaFlow cat-back, TRD air filter, Amsoil fluids, custom 15" overhead DVD system, Eclipse NAV system w/camera, Sirius tuner, DLS Nobelium components and coaxials, TRU 2-channel amp, 13" eD sub, eD Nine.1 amp, iPod hookup. SilverStar lamps.
sub woofer positioning question
, what some good amps to pair up with these sorts of subs? hopefully not to break the bank ether.
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