Whats Wrong?

namelessjoker · Posted: Mon Apr 04, 2005 9:01 am Post subject: Whats Wrong?

I have just installed my new sound system...It includes 2 Audiobahn alum12q..and an audiobahn A18001dq.....The subs are 6ohm duel VC and the Amp is 1800watts rms at 1ohm....at the moment i am running at 1.5 ohms for about 1600watts.....The subs are in a Sealed box that meets the specs in the book..... also have a 1.2cap.....WILL NOT GET LOUD!!!!!!!!!!!!!!!!!!....WHAT AM I DOING WRONG?

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[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

what do you mean by they won't get loud?
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Rocksteady · Posted: Mon Apr 04, 2005 2:52 pm Post subject:

Have you tweaked your HPF & LPFs?

Could the speakers & SW be "out of phase" with your system?

It should sound awesome with all those watts... I hope you get it straightened out...

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ToggleHead · TWEAKGURU Joined: 03 Mar 2004 Posts: 4360 Location: Jersey

watts dont really mean volume...just power to speakers..... yeah you need to be more specific about will not get loud.....

Do the speaker travel alot?
Is the amp getting hot?
Are they bridged mono?
Are they run in series or parallel?
Head unit....size enclosure....etc
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mk000000 · TweakNOOB Joined: 29 Dec 2004 Posts: 78 Location: Philly

Bigger speakers = louder, just make sure you dont sacrifice qualitly

mk000000 · TweakNOOB Joined: 29 Dec 2004 Posts: 78 Location: Philly

lets not forget, if its a 1000 bone BOSE system, the above statement need not appky

ToggleHead · TWEAKGURU Joined: 03 Mar 2004 Posts: 4360 Location: Jersey

namelessjoker · Posted: Tue Apr 05, 2005 10:05 am Post subject:

When I said it wouldnt get loud i meen that when i turn it up i can barly hear it....theres a little rumble but not much...i have turned the stuff on the amp up and everything.... the only thing i can think of is when they hooked the speakers up in the box they were hooked up wrong...guess i should have done it myself.. I will check that out tonight... Can that be the problem?? Anything else that could cause this?

[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

How are the subs wired?
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ToggleHead · TWEAKGURU Joined: 03 Mar 2004 Posts: 4360 Location: Jersey

even if they were wired wrong...chances are with everything all the way up you would get some serious volume.....this sound so far like an amp problem....most likely in the wiring....
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namelessjoker · Posted: Tue Apr 05, 2005 1:37 pm Post subject:

The amp is a Brand new A1800!DQ mono block amp...with cooling fans...havent used it enough for it to get hot...they are wired parallel....the head unit is a JVC...dont remember the model....Box is a sealed wedg box...not sure on the Cubic inches.... I think that the it may only be hooked up to you voice coil in the box....im at work atm but I will take them out and look at them when i get home.....but you think it could be the amp?

namelessjoker · Posted: Tue Apr 05, 2005 1:44 pm Post subject:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=64571&item=5765610055&rd=1

Its one of these only last years model....everything is the same.

[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

HOW WAS THE SUBWOOFERS WIRED......

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namelessjoker · Posted: Wed Apr 06, 2005 8:37 am Post subject:

Well lastnight when i got home i took the subs out of the box and found that only on voice coil was hooked up......I had the subs wired with the +'s togeather and the -'s togeather going to the amp.... so i hooked up both voice coils while i hade them out of the box and when i put them back in and turned it on i found that one of the subs wasnt working..... i played with it for another 3 hours and that sub just wouldnt work...

Wiring looked like this http://www.usspeaker.com/parallel_wiring.gif

fussnfeathers · Lord of the Tweak Joined: 14 Dec 2004 Posts: 2763

Actually, the way they were originally hooked up is proper. For parallel hookup, the pos's and neg's are hooked together. You might want to try serial hookup, with the pos of the first sub hooked to the neg............I had a diagram here somewhere, it's hard to picture from a text post.

Anyway, with dual voice coil, hooked to a mono amp, here's basically what you do:

Hook on positive on each sub to the positive on the amp, connect the negative on that same coil to the positive on the other coil of each sub (meaning, sub one, + terminal on the first coil to + on amp, - on first coil to + on second coil), then the - connection on the second coil to the amp. Do this with both speakers, and you're using both coils on both subs.

Personally, I think you got ripped on the subs and box.........dual coil subs are best in single-sub config, for a dual, triple, or quad sub box, you're best served by single coil subs, that can be run the same way off a mono amp, without the power loss.
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namelessjoker · Posted: Wed Apr 06, 2005 10:56 am Post subject:

I have looked through a few diffrent forums and most people say that the Alums being 6ohm its best to run them in a set of 3 and with a mono amp stable to 1ohm.....i have 2 subs and the amp it stable to 1ohm but its at 1.5 atm....i didnt get riped on the subs and the box because i only gave $75 for each sub and the box is just a old one i built for some subs i had in my truck...moved to a t-bird so need new box...
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fussnfeathers · Lord of the Tweak Joined: 14 Dec 2004 Posts: 2763

Well, that's half your problem there. The box you have isn't designed for those subs, nor for the space in the back of your car. Replace the box, wire them in series (minimum ohm load, max thump), and you'll be good.

Ya just can't take any sub and throw it in any box, in any car, ya know.........they have to match.
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[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

wb131988 · TweakNOOB Joined: 03 Feb 2005 Posts: 194 Location: UK

Yer I had to wire my two Alpine R's in series to a A8001DT and OMG it sounds so sweet all thanks to you guys helpin me in these forums. THANKS GUYZ!

[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

wb131988 · TweakNOOB Joined: 03 Feb 2005 Posts: 194 Location: UK

sorry, I meant in parrallel. all the +'s together to the + on the amp, and all the -'s together to the - on the amp (2 DVC drivers in parallel into 1 ohm to gain max output from the amp) correction approved

namelessjoker · Posted: Wed Apr 06, 2005 6:57 pm Post subject:

well guys....i checked all the wires and i found everything was great...untill i saw how the cap was wired.....it had the amp grounded to it and it grounded to the frame... Then i noticed that the guage on the amp was showing 11.1 volts....i changed those wires and then it shows 12.1.....i also picked up a new sub because the other was not working.... When i hooked it up and got everything put back it is now sounding good.....as soon as i get my 3rd sub im making my new box....yeah i know i cant just use any old box to put new subs in.... Thats just a temp till i get my 3rd sub...lol buying the new one today should have been my 3rd....guess i need to wait another 2 weeks or so. thanks for your help guys....
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namelessjoker · Posted: Wed Apr 06, 2005 7:02 pm Post subject:

Oh i forgot to let ya know that I totaly made it look cool as crap!!!! I made kind of a false wall... Only i didnt use wood or anything like that.... I used a dark blue velvit... Spans from the top of my trunk to the bottom and side to side...only thing you can see is the nice silver of the alums and the light from a 6" 12v black light tucked out of site... SWEAT A$$!!!!....will change when i get the new box tho...will post pics as soon as my cam stops suckin balls!
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[TN] Nathan · ALMIGHTY PWNER! Joined: 14 Feb 2002 Posts: 7406

I think two subs should be adequate.
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ToggleHead · TWEAKGURU Joined: 03 Mar 2004 Posts: 4360 Location: Jersey

i know what he means though...there is something about three of tose audiobahns that rules..... go for it man...=D
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