posted
waz up,i have 3 mtx "10" T5 12ohm's wired in parrel in a sealed box.briged to a mtx 2300x @4ohm's mono and cant hit 140 .and i got a RF QEQ-1 eq too. also have a .5 cap and red top battery with 4 gauge wire runing most of the way to my amps.and this is all in a 94 camaro.the highest i ever hit was 139.7 and i keep blowing my subs too.the amp is rated at 600x1 rms and the sub trio holds 1500 watts peak and i blow them 4 times.
posted
You gave a Camaro and are only hitting that with that car? Is that legal or outlaw? Where was the mic at?
There could be a voltage problem. I know some one that has a similar car and I think the same amp. But he dont have the extra stuff you have and is having problems. What kinda votage you getting AT the amp under load? Also what do you have the gains and xover set at? Where are the subs placed at and is the box premade or did you make it?
------------------ _____________________ Member of "Team Underconstruction" Can you say 172dB outlaw 160's+ legal in a yugo? We can:-) 1999 USAC Finals Qualifier Usac Sactioned Judge -----Judged----- 1999 Spring Break Nationals 1999 Midwest Regional 1983 Camaro-152dB old system..new system on the way. -Irc Chat Room- chat.talkcity.com ports 6667,6668,6669,7000 Room Name #auto-audio I am the room coordinator for this room. Stop by sometime and say hi...We are busy after 9:00cdt usually.
posted
its legal 139.7.the box was custom built at sound advice. and is placed in the top of the big dip in the back and ams are under neth with a fan to keep things cooled down.i only went to db drags a idbl the mic placements are the same lower right coner of windshield. my 4-gauge power goes to the top of the back seat and 8 gauge the rest of the ways . for the eq setting gains and freq are a 3/4 of the way up and same for my amp and thunder eq too give or take a little .and thats probaly my promblem i dont know that much abuot setting eq settings and setting on the amps.box is a unkown amount of cubic feet.it hits very good and very low 50 and under only and i dont know what freq. to hit either .
posted
Run four guage all the way to the amp, first.
Second- You blow your subs because you are playing a great deal of distortion across them, turn your gains down a little and they will play cleaner and louder.
Third- Three tens is a LOT smaller than three twelves, so don't expect to hit what 1ldlincoln can do.
Four- Good luck:-)
Try using a oscilliscope when you set your gains. If you don't know how to do this, post a message asking it. But that will more than likely give you at least a stable sub setup.
------------------ ShadowStar
143db Standard Cab Ranger
Posts: 2579 | From: Somewhere In the Northeast | Registered: May 1999
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posted
Well shadow is quite right. Sound like distortion is killing the subs. Other thing is friend of mine had 2 DD 15's not the new ones I forget what model. Had a custom box that was not all that and the area he had the subs in the car just didnt work. I think he redid the box and I know he moved the subs and the spl went up. But I would do what shadow said...
------------------ _____________________ Member of "Team Underconstruction" Can you say 172dB outlaw 160's+ legal in a yugo? We can:-) 1999 USAC Finals Qualifier Usac Sactioned Judge -----Judged----- 1999 Spring Break Nationals 1999 Midwest Regional 1983 Camaro-152dB old system..new system on the way. -Irc Chat Room- chat.talkcity.com ports 6667,6668,6669,7000 Room Name #auto-audio I am the room coordinator for this room. Stop by sometime and say hi...We are busy after 9:00cdt usually.
posted
I think i got a voltege problem maybbe i need to change the alternator or rewind it because when im in idle the system always cut outs and the voltage drops down into the redzone and sometimes when the bass drops the voltages goes down a massive amount of current and even when its reved up at 1500 rpms and still drops at red and then cuts out well if you have any answers i would really appreciate it
posted
Well that sounds like the same problems my friend was having. He never did try and fix it he got rid of the car and now has a truck. Good Luck
------------------ _____________________ Member of "Team Underconstruction" Can you say 172dB outlaw 160's+ legal in a yugo? We can:-) 1999 USAC Finals Qualifier Usac Sactioned Judge -----Judged----- 1999 Spring Break Nationals 1999 Midwest Regional 1983 Camaro-152dB old system..new system on the way. -Irc Chat Room- chat.talkcity.com ports 6667,6668,6669,7000 Room Name #auto-audio I am the room coordinator for this room. Stop by sometime and say hi...We are busy after 9:00cdt usually.
posted
I would say that a cap would be one of the FIRST things that I did. Set the levels to stop blowing subs.
Also- Take a multimeter reading across the B+ and ground terminals of the amp, and load it up (play loud) does the voltage drop considerably? If it does, then you have what is called ADD (alternator deficiency disorder) and you should buy a cap. Does the voltage stay at 14.4 v with the stereo off (or somewhere above 13.5 volts?)
ShadowStar
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Computers are a lot like air conditioners.. Open Windows and they become useless..
The day Microsoft makes something that doesn't suck is the day they make vacuums.
Posts: 2579 | From: Somewhere In the Northeast | Registered: May 1999
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posted
Shadow..he kinda answered that...Said that the voltage on the cars meter went into the red. And if I remember right that is droping below 12 volts. If his problem is that bad a cap will help BUT the problem is not solved and it is like a bandaid on a underlying problem.
------------------ _____________________ Member of "Team Underconstruction" Can you say 172dB outlaw 160's+ legal in a yugo? We can:-) 1999 USAC Finals Qualifier Usac Sactioned Judge -----Judged----- 1999 Spring Break Nationals 1999 Midwest Regional 1983 Camaro-152dB old system..new system on the way. -Irc Chat Room- chat.talkcity.com ports 6667,6668,6669,7000 Room Name #auto-audio I am the room coordinator for this room. Stop by sometime and say hi...We are busy after 9:00cdt usually.
posted
You might consider asking you local Car Audio Dealer about the Russian capacitor that just hit the market. Its 15 fared. Thats right 15 and it retails for $495.99.
The last competition I went to I hit in the low 140's with a single stroker 15. The only one who beat me had Three MTX Blue Thunder 10's and he hit 146.6
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Posts: 190 | From: Newburgh, Ny 12550 | Registered: Jun 1999
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posted
Check on the dimensions of your box. Remember its just (L" x W "x H") / 1728 = cu ft. If your system only sounds loud at very low freq, and drops off by 50 hz, you might want to alter the box to adjust (raise) the tuning freq. My friend hits 140 with 2 10's in a ported box tuned to 40 hz. Since you don't know much about eq settings, try to locate someone who does and ask for their help. Get a cd with the diff hz signals and see if you can get louder by playing a diff hz. Did the stereo shop just build the box, or did they install the whole system? You (much less an installer) should have no trouble hitting 140's once your voltage problem is fixed and your box is tuned.
One last suggestion, go to a shop with a different meter and see what it says. I've seen the same cars vary by 6 dbs at two different shows within two weeks of each other!
Posts: 291 | From: Dublin VA USA | Registered: Sep 1999
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posted
Yeah pro, but you know how inaccurate those can be.. Sometimes they work..
If the voltage went TOO low, the car idle would drop, and the car could shut off... I thought perhaps using a multimeter would give him a better idea of what really happens.
Didn't mean to be redundant.
I don't think a 15 f cap would help you if a 1 farad cap wouldn't help... Your electrical system might need some help.. How about having your alternator rebuilt (not too expensive a thing..) and regrounding your electrical system? This could help root out some problems, and it never hurts.
Also.. 140 is a pretty reasonable number for three tens.. Maybe they just won't go any louder? Perhaps you need more power? See if you can get a hold of a bigger amp (borrow it..) and run your subs with it.. See if you get any gain at all.
But get your electrical system checked out, dude.. Buy a new battery too At least inspect the old one.
ShadowStar
------------------
Computers are a lot like air conditioners.. Open Windows and they become useless..
The day Microsoft makes something that doesn't suck is the day they make vacuums.
Posts: 2579 | From: Somewhere In the Northeast | Registered: May 1999
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posted
waz up, i got my hands on a voltmeter and with the car off its 12.5 everywhere
car runingand system on put not playing music, no a/c or lights on and it reads 13.5 at batt at amps and cap
system at 65% it drops to 12.5 at amps and cap and batt.
O, ya a kid had the same amp speakers and seald small box hitting 143 in a mitushish eclipse.so i know a sett up like this can hit low to mid 140,s
sound advise build a sealed .75 cubic ft per speaker. and i installed everything else and no iam not a professional but i installed some decent streos systems in my 18 years
and plan to go to installer institude and get my mecp. thanks
posted
Well as far as the voltage drop goes if it dont go below 12 volts it is still not a absolute no no...But there still is quite a drop there. I would look to stabilise that voltage.....first and then go from there...
------------------ _____________________ Member of "Team Underconstruction" Can you say 172dB outlaw 160's+ legal in a yugo? We can:-) 1999 USAC Finals Qualifier Usac Sactioned Judge -----Judged----- 1999 Spring Break Nationals 1999 Midwest Regional 1983 Camaro-152dB old system..new system on the way. -Irc Chat Room- chat.talkcity.com ports 6667,6668,6669,7000 Room Name #auto-audio I am the room coordinator for this room. Stop by sometime and say hi...We are busy after 9:00cdt usually.
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