posted
That pic is kinda fuzzy. Could you clarify the orientation of the subs? Are they facing towards the cab or the back of the trunk?
Posts: 3 | From: Heidelberg. Germany | Registered: Jul 2008
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posted
Well I am trying to build a trunck car that can hit 150 db and so far we have got it to a 148.8...My problem is that it hits so hard that the gains move on the amps which means it won't hit so hard. What can I do to get that to stop and yes we have tried tape and it just is not working...I have to hifonics 2608 amps
-------------------- TEAM MAXXSONICS 98' Chevy Blazer (Green) 2 Ascendent Audio 12" 2 Hifonics 2608d 1/0 gauage wires 3 Kinetic batteries Love for this sport Respect for others
Go big or Go home 2008 29.9 class lost to Adam T(8th place) 2009 39.9 class lost to Adam T (3rd place) And I do not have any problem with that at all...I love the sport... Posts: 58 | From: Oshkosh, WI | Registered: May 2009
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posted
fire the subs and port forward and seal it off from the trunk... or bend a paper clip to fit in the slot on the gain knob, then bend it till there is a piece flat on ether the top or side of the amp and tape it there so the paper clip can't move and nether can the gain... ghetto but should work
Posts: 322 | From: Brantford, Ontario | Registered: Oct 2007
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posted
Wax. I've heard of some stereo shops putting wax on the amp's pots. If the knobs have been turned, then the customer or his buddies was messing with it, and they no longer have to do free warranty checkouts when stuff gets blown up. try some different types of wax.
Posts: 5494 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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quote:Originally posted by Tooloud_4_me: Well I am trying to build a trunck car that can hit 150 db and so far we have got it to a 148.8...My problem is that it hits so hard that the gains move on the amps which means it won't hit so hard. What can I do to get that to stop and yes we have tried tape and it just is not working...I have to hifonics 2608 amps
I help out with this car a lot, And after I reset the amps, I will probably dabble some silicone in the gain pot. This way it will pull out in a single clump when done. We alread had taped the pots down, but something happend this last weekend. Havent confirmed yet that it was gain or a speakerwire, or what exactly, but we will figure it out.
-------------------- PROUND MEMBER OF TEAM MAXXSONICS SOUNDMEKANIX STREET A RELIVED 2006 US POINTS CHAMP. 2006 FINALS 4TH ST B. (155.8) 2007 149.9 Bassrace Broke at finals 2008 149.9 2nd place at regionals. Posts: 278 | From: oshkosh, wi | Registered: Mar 2006
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The amps were on the box but then we moved them because the ports on the amps where you screw them down broke off...lol...now they are in the wheel well and like Thee Michael Hughes said something happened this weekend because I was only able to hit a 146. To give credit where it is due Thee Michael Hughes did design this and my father in law helped build it...So thanks to everyone...trust me I wouldn't be where I am now with my system without them...We did find out that pushing the box back and having it fire into the cabin helped us gain some. Just need some advice at how to get it to 150 or more...and of course getting things to stop vibrating as much...
-------------------- TEAM MAXXSONICS 98' Chevy Blazer (Green) 2 Ascendent Audio 12" 2 Hifonics 2608d 1/0 gauage wires 3 Kinetic batteries Love for this sport Respect for others
Go big or Go home 2008 29.9 class lost to Adam T(8th place) 2009 39.9 class lost to Adam T (3rd place) And I do not have any problem with that at all...I love the sport... Posts: 58 | From: Oshkosh, WI | Registered: May 2009
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quote:Originally posted by dtbrown: Having the port center is louder for sure. I think it's something to do with the the way the subs where loading.
In my car,when I tried a center ported enclosure,I lost 1.8db.I was definately louder,with a driver side ported enclosure.
-------------------- MR. SEARS (LOUD) LIL WHITE CAVY TEAM HIGH X-CURSION STEVE(TEAM CAPTAIN) TEAM DD 2009 SS-NW AND STREET C(THEY'RE HERE) 2008 TRUNK MODIFIED WORLD RECORD HOLDER (153)12v certified legal TL 2008 2007 PRO TRUNK WORLD FINALS (150.9<150.2)12v 2006 PRO TRUNK 1x WORLD RECORD HOLDER(151.2)12v 2005 NSPL TRUNK STOCK WORLD RECORD HOLDER(148.1)12v 2005 1x NSPL TRUNK STOCK WORLD CHAMPION 12v 2004 2nd PLACE TRUNK STOCK WORLD FINALIST (141.6)12v 1989 Installed my first system Posts: 1588 | From: Elizabeth City,NC | Registered: Feb 2006
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quote:Originally posted by Mr.Sears one 15 sub from hell:
quote:Originally posted by dtbrown: Having the port center is louder for sure. I think it's something to do with the the way the subs where loading.
In my car,when I tried a center ported enclosure,I lost 1.8db.I was definately louder,with a driver side ported enclosure.
In my test is with a flared port not a slot port. Center in our test with a flared port was loudest. But every application is different.
Posts: 1770 | From: elgin | Registered: Jan 2003
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quote:Originally posted by Mr.Sears one 15 sub from hell:
quote:Originally posted by dtbrown: Having the port center is louder for sure. I think it's something to do with the the way the subs where loading.
In my car,when I tried a center ported enclosure,I lost 1.8db.I was definately louder,with a driver side ported enclosure.
In my test is with a flared port not a slot port. Center in our test with a flared port was loudest. But every application is different.
Definately agreed in that it's different per vehicle and application.
Without sealing it I found centered and pushed back firing forward was loudest. I gained over 1.5db by sealing it forward (which also includes sealing the rear deck). Any time I flipped the box around I lost 2+.
-------------------- Team DefJ Team High X-Cursion Team DC Team Stetsom USA
2 DC lvl 5 10's, Stetsom 14k2d 151.6 DbDrag Posts: 614 | From: Auburn, NY | Registered: Jan 2008
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quote:Originally posted by Mr.Sears one 15 sub from hell:
quote:Originally posted by dtbrown: Having the port center is louder for sure. I think it's something to do with the the way the subs where loading.
In my car,when I tried a center ported enclosure,I lost 1.8db.I was definately louder,with a driver side ported enclosure.
In my test is with a flared port not a slot port. Center in our test with a flared port was loudest. But every application is different.
Definately agreed in that it's different per vehicle and application.
Without sealing it I found centered and pushed back firing forward was loudest. I gained over 1.5db by sealing it forward (which also includes sealing the rear deck). Any time I flipped the box around I lost 2+.
And to show how different when sealing it off from the trunk it lost and when pushed further inside the trunk it gained close to 2db. Maybe because you where using 15's or something and probably due to different car. And you where using a lot more power then us and a lot louder and that could be a factor.
Our set up is just very efficient for doing almost 150db with 2 12's and only 2000-2200w @ 45hz. If I remember right with 1100w it does 145-146db. We haven't touched it since so if we can put some more work into it maybe get some more.
Posts: 1770 | From: elgin | Registered: Jan 2003
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So we finally got a chance to play with the car more. So we walled the box off the box to the trunk using mdf and "L" brackets to secure wood to box and car. And used gorilla tape to seal cracks. This is a test to see if results are worth doing a nice looking wall or not.
Gain from walling off was .4-.5db gain which put us up to a 150.3db consistent with 2000w clamped power but one hz down to 46hz from previous 47hz.
Put 4000w and did 152db at 47hz. Didn't have time to tune port and we found out our rear battery wasn't getting a charge so we'll have to come back and retest with full battery and change up some wiring.
And at lower frequencies we gained almost 1db over their best score.
Over all good gain but it's not perfect and there is still more to gain since when we open the trunk and burp it still loose .5db or more. That shows that the box is still using the trunk to load some.
But the really bad thing is when you close the back seat and seal the subs up again we now lose 8db so seats need to be down to be loud. Posts: 1770 | From: elgin | Registered: Jan 2003
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posted
are their any other vents from the trunk to the cabin? maybe on the rear deck, or off the the sides of the passthrough? or in the doorjams?
Posts: 5494 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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quote:Originally posted by D-Bass: are their any other vents from the trunk to the cabin? maybe on the rear deck, or off the the sides of the passthrough? or in the doorjams?
Yah but sealed those off too. Box needs to be stronger for sure. A lot of gains but for having fun with out trying to hard we're pretty happy with results.
Posts: 1770 | From: elgin | Registered: Jan 2003
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-------------------- Michael A. Nauta TEAM CACTUS SOUNDS Proud former member of TEAM KICKER 2000-2001 Street 3-4 2002-2004 Super Street 1-2 NW 2006-2009 Street A 2010 ??????????????????
quote:Originally posted by murilo@soundigital.com.br: And is a impressive score for a trunk, why dont you burp it at competitions? I would love to see it, with like 8-10kW.
Keep in mind that this is not a spl box but a street music box. If we make a spl box we could easily gain 1db if not more. This is just a project for a loud street beater not competition car. And subs can't handle much more then 6k total for a burp since it's tuned to 46hz. 8-10k the subs would probably fly out of the gap at that 46hz with that much power. lol
I'm just sharing this info because not many people have gotten a trunk car to do around a 150db with 2000w. Spl set up probably people have gotten much louder. I hope this helps other peoples projects.
Posts: 1770 | From: elgin | Registered: Jan 2003
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A daily enclosure tuned to 46hz? Alot of music is just gonna destroy those woofers with much more power on music. Maybe a 35-38 tuning would be better for daily? Loud set-up though.
-------------------- -Donald Hebig -All Out S.P.L. Saskatchewan's dB Drag event promoter -Check the Termpro homepage partners for the companies I support. Posts: 2600 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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So we finally got a chance to play with the car more. So we walled the box off the box to the trunk using mdf and "L" brackets to secure wood to box and car. And used gorilla tape to seal cracks. This is a test to see if results are worth doing a nice looking wall or not.
Gain from walling off was .4-.5db gain which put us up to a 150.3db consistent with 2000w clamped power but one hz down to 46hz from previous 47hz.
Put 4000w and did 152db at 47hz. Didn't have time to tune port and we found out our rear battery wasn't getting a charge so we'll have to come back and retest with full battery and change up some wiring.
And at lower frequencies we gained almost 1db over their best score.
Over all good gain but it's not perfect and there is still more to gain since when we open the trunk and burp it still loose .5db or more. That shows that the box is still using the trunk to load some.
But the really bad thing is when you close the back seat and seal the subs up again we now lose 8db so seats need to be down to be loud.
Jeff is that white box a audiocontrol piece?? If so what model number. Sorry to thread jack. By the way very loud score for only 2000w
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