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Originally posted by PeteS:
I will throw in my 2 cents on this.

Sanding and polishing at this point is usless it's not going to yeild any large gains snd any tear out he does would destory that work.

Rounding will help some not going to get you any huge gains. To see 2Db gain in rounding would mean that there is a diffrent issue that needs to be looked at.

I'd drop 2 subs and plug the holes for the other 2 SOILD. Fill the seams and sand out if ya need to. Use the same amount of amps ya got right now. See what happens. This would give ya a clue if more air space is needed for the subs. I would assume that with 1/2 the cone area and 1/2 the power the number will not change like you would think. This will tell you 100% with out the hours of shrinking the box time after time weather the air space will work with 4 subs. Ya might even be surpised that 2 subs is as loud as 4 subs. I know shrinkng a box sucks.

Be careful with to much port, you can cross the line where more port in not a good thing.

When you burp it what do the subs do....do they play in to the box...play out of the box or do they move the same amount in and out ? That can give you a very good idea on what area needs to be addressed.

Have you sat in the van and played it to get a feel of how it sounds and feels ? What is the air in the port like ? Does the port have pressure or vacume......no flow at all ?

One of the most important thing I have learned was how to tune a baffel. Not as far as it affects the tuen of the box but how the subs react to the thickness of the baffel. A baffel thagt is to thick will hurt your score more then you would belive. I also learned that a straigh circle is about the worste thing to do when you have a think baffel. When ya build a thick baffel think Areo port

I'm sure if ya relook at this there is a simple mistake that has casued you so much grief.

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More port in an astro with 4 18's is better and 40 cubes is too big for the woofers he has so knocking it down to two he would most likely blow up some stuff. As far as the baffle is concerned it depends on the subs and the enclosure in general. Mine is loud with a 9" thick baffle.

I hope you get to that 160 there's probably just something you're overlooking that is holding you back. I had that problem 5 years ago when all I had to do was run a ground wire from the battery to the back and gained 5 decibals. So it might be something simple like that.

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Team Cactus Sounds
Team XS Power

Posts: 2394 | From: WI | Registered: Jun 2004  |  IP: Logged | 

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Originally posted by SpL AuDiO1:
ok so wait i just sold three pair of the crunch ground pounders and i used a switched 12v when i coulda just hooked the leds to the signal wire i for some reason thought it would hurt something guess i shoulda tried ok well keep the updates coming gav

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I hope it won't hurt anything, I'm waiting to here back from Mike or some of my team members about this type of connection.

I checked today with my DMM and even with the lights connected the way they are. the meter still ready 1 ohm, so I guess I'm ok.

[ 05-29-2009, 09:47 AM: Message edited by: Gavin ]

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Team D.I.Y
TEAM MAXXSONICS (Feel the Power!)
TEAM Cactus Sounds (Japan)
LFG Fareast.
He may not come when you want but, he's always right on time!

Posts: 1878 | From: Fukushima, Japan | Registered: Mar 2005  |  IP: Logged | 

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Originally posted by bigbarry:
I know that this is late in the post but I wanted to know in building your foundation for the box did you have to liquuid nail in laying your mdf down or screws/ brackets?

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BB, it's never to late to ask a question, I just gotta remember!! lol aaaaaaaaaaah ok, Being that this was my FIRST build, I over did it. Glued and screwed. You would dam near have to cut the floor out right now!

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Team D.I.Y
TEAM MAXXSONICS (Feel the Power!)
TEAM Cactus Sounds (Japan)
LFG Fareast.
He may not come when you want but, he's always right on time!

Posts: 1878 | From: Fukushima, Japan | Registered: Mar 2005  |  IP: Logged | 

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Originally posted by bigbarry:
So how would you advise me to start my build?

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GET ADVICE FROM SOMEONE WHO HAS YOUR CAR and in your class!! Not yelling, just trying to stress that point! if you can, get pictures and ask questions. I spoke to so many people, it wasn't funny! many people had different ideas on what I should do, but I feel that the best advice I got was TAKE YOUR TIME AND TEST after each SMALL change. test test test! and this came from TOP people.

Also remember, just because the car is the same, the freq may not be the same. Every car is a little different. I hope that helped a little.

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Team D.I.Y
TEAM MAXXSONICS (Feel the Power!)
TEAM Cactus Sounds (Japan)
LFG Fareast.
He may not come when you want but, he's always right on time!

Posts: 1878 | From: Fukushima, Japan | Registered: Mar 2005  |  IP: Logged | 

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quote:

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Originally posted by SpL AuDiO1:
hey gav hows the build going? any updates?

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Sorry boss, the astro has been put on hold for a minute, I'm trying to build my demo car for another competition for smaller cars. As soon as I get that done, its back to the astro dor sure!

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Team D.I.Y
TEAM MAXXSONICS (Feel the Power!)
TEAM Cactus Sounds (Japan)
LFG Fareast.
He may not come when you want but, he's always right on time!

Posts: 1878 | From: Fukushima, Japan | Registered: Mar 2005  |  IP: Logged |