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View Full Version : SPL advice needed for my hatchback



BassAddictJ
10-30-2006, 10:12 AM
Question is, which way should the sub and port be faceing for the best SPL result in this style of hatchback.....the hatch isnt angled hard like CRX's and some other jap hatches, see the links at the bottom for pics of what it looks like.

i have a single TC4HP, about 3000w, and within the next week or two i'm ging to go measure my cars resonation frequency.

should it go sub up port towards the front. do areo ports have any signifigant advantages besides saving space? i'm looking for a non wall type application. My hopes are to kick some *** in street C, so SPL heads i'd love ur advice on how to do this.


exact same looking hatches as mine:
http://cgi.ebay.com/ebaymotors/VOLKSWAEN-GOLF-TDI-GLS-HATCHBACK-DIESEL-MANUAL-TRANS_W0QQitemZ220039796482QQihZ012QQcategoryZ1529 2QQcmdZViewItem

http://www.edmunds.com/media/news/column/letterstotheediors/02.feb/00.vw.golf..f3-4.500.jpg


i'll get internal pics if you guys need.....

2000LaDe
10-30-2006, 10:14 AM
either sub up or forward and aero port back

BassAddictJ
10-30-2006, 07:30 PM
cool

any other opinions guys ???

mazdakid
10-30-2006, 07:48 PM
i have a hatch and so far mine is loudest with sub up and port facing drivers side in the back

BassAddictJ
10-31-2006, 04:56 PM
i like ur setup btw mazdakid........ur hatch is more angeled than mine...but so far between you2 guys and some other people ive asked they all recommend sub up port back.......

lilmaniac2
10-31-2006, 04:58 PM
at finals in street a a guy did over a 153 with a vw golf... sub up port to pass side i think

SQBubble
10-31-2006, 09:01 PM
at finals in street a a guy did over a 153 with a vw golf... sub up port to pass side i think

waww, with what sub and power??

PowerNaudio
10-31-2006, 09:04 PM
just for better use of space with the seat up not folded down. i would place the sub up and port up aswell. that way there wont be anything in the way of the port or sub. so max air movement. for both the sub and port. or you could make a small enclosure for testing purposes and try every wich way since you are going to compete. then you should try diffrent types of enclosure to see what works best. to be the best you have to do tests. but i would go with sup up port up.

SQBubble
10-31-2006, 09:12 PM
just for better use of space with the seat up not folded down. i would place the sub up and port up aswell. that way there wont be anything in the way of the port or sub. so max air movement. for both the sub and port. or you could make a small enclosure for testing purposes and try every wich way since you are going to compete. then you should try diffrent types of enclosure to see what works best. to be the best you have to do tests. but i would go with sup up port up.

i think sub up and port up would be nice for spl but wont sound good at all...imo

PowerNaudio
10-31-2006, 09:13 PM
i think sub up and port up would be nice for spl but wont sound good at all...imo

id like to know how did you figure it wont sound good.

mazdakid
10-31-2006, 09:54 PM
i havent had mine on a meter, but this car and my last hatch didnt get as loud with sub and port up

PowerNaudio
10-31-2006, 10:05 PM
thats why i also sugested trying diffrent styles of enclosure. what works on one car may not work the same in a diffrent car. the reason i sugest the port up on that car is because its a small area for an enclosure, so placing the port back would mean that the enclosure would have to be limited to leaving enogh clearance for the port. i know allot of people dont care about that clearance. but it is nesesary. so by having the port up. you can squeze a bigger box in the limited space. i dont have any prefference on the style of enclosure, im just looking at the area avalible and what would be "best" for the install. i cant say that it will be the "best" posible solution for this particular vehicle. but it just seems like the most sutable for the avalible space.

mazdakid
10-31-2006, 10:12 PM
you dont need that much port clearance all the time, i just had mine 2" away and it was fine

PowerNaudio
10-31-2006, 10:14 PM
you dont need that much port clearance all the time, i just had mine 2" away and it was fine

what where the port dimensions?

mazdakid
10-31-2006, 10:30 PM
5.5" wide

PowerNaudio
10-31-2006, 10:37 PM
so youre basicaly changing the tuning that the enclosure was designed for by having it so close. yeah it may sound good or ok. but im sure if you give it over 5.5" of clearance it would sound the way it was designed for.

klepto
10-31-2006, 10:40 PM
My mag and port are facing towards the hatch. Port is on drivers side, sub is on passenger side. Sounds great, all though i am not concerned with hitting hte most deebeez possible.

BassAddictJ
11-01-2006, 08:45 AM
hmmmm...interesting......rightn ow my daily box has sub and port on same side...ill try letting that fire up and see how it sounds for shits and giggles and compare it to how it soudns when firing back....there's like 3inches clearance at most between the sub and the hatch door. now if i fire it up there will be more room and i can slide it closer to the back, or close to the seats with the seats up (and there being a gap between the back hatch door and the box). if it gets louder ill figure out a way to build a sliding port baffle to change my tuning freq to what i need for comps, thatd be nicer then building a whole new box....IF it sounds louder that way...need a meter....

again, my hatch isnt shallow angeled (45 degree ish), more of a 90 degree angle ish.....hopefully my new top willc ome soon aso i can **** around with it and see whats best.....