Need help with subs and amp setup
10-04-2011, 05:37 PM
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Need help with subs and amp setup
Hello guys and ladies . 1st let me apologize in advance for my user name.... Its the same in every forum i use and it makes it easier for me to remember lol....
Ok so here goes..... A buddy of mine has a 2009 f150 extended cab.
He removed the rear seats and had some friends build him a custom fiber glass box to hold four dual 4ohm kicker l7's and he is pushing these with a power ackoustik 5500 mono block d amp.
When the box was near completion (everything except paint) , they test fitted it in the truck and the box sounded great. Now after it has been painted, installed and wired up correctly it sounds like garbage! Just for comparison : I have a single 12'' slim pioneer with a 600 watt/300rms amp in my chevy and in my opinion mine seems to be hitting harder.
His box is ported, but what i believe happened was : The box flexed so much that the air is now being pushed out the seams of the bottom of the box and this is why it is not hitting hard??? When i put my hand under the box i can feel air . Any advice? Could the speakers be blown? How can i test it?
I will take pics and post dimensions soon.
Ok so here goes..... A buddy of mine has a 2009 f150 extended cab.
He removed the rear seats and had some friends build him a custom fiber glass box to hold four dual 4ohm kicker l7's and he is pushing these with a power ackoustik 5500 mono block d amp.
When the box was near completion (everything except paint) , they test fitted it in the truck and the box sounded great. Now after it has been painted, installed and wired up correctly it sounds like garbage! Just for comparison : I have a single 12'' slim pioneer with a 600 watt/300rms amp in my chevy and in my opinion mine seems to be hitting harder.
His box is ported, but what i believe happened was : The box flexed so much that the air is now being pushed out the seams of the bottom of the box and this is why it is not hitting hard??? When i put my hand under the box i can feel air . Any advice? Could the speakers be blown? How can i test it?
I will take pics and post dimensions soon.
10-04-2011, 09:44 PM
#2
Hello guys and ladies . 1st let me apologize in advance for my user name.... Its the same in every forum i use and it makes it easier for me to remember lol....
Ok so here goes..... A buddy of mine has a 2009 f150 extended cab.
He removed the rear seats and had some friends build him a custom fiber glass box to hold four dual 4ohm kicker l7's and he is pushing these with a power ackoustik 5500 mono block d amp.
When the box was near completion (everything except paint) , they test fitted it in the truck and the box sounded great. Now after it has been painted, installed and wired up correctly it sounds like garbage! Just for comparison : I have a single 12'' slim pioneer with a 600 watt/300rms amp in my chevy and in my opinion mine seems to be hitting harder.
His box is ported, but what i believe happened was : The box flexed so much that the air is now being pushed out the seams of the bottom of the box and this is why it is not hitting hard??? When i put my hand under the box i can feel air . Any advice? Could the speakers be blown? How can i test it?
I will take pics and post dimensions soon.
Ok so here goes..... A buddy of mine has a 2009 f150 extended cab.
He removed the rear seats and had some friends build him a custom fiber glass box to hold four dual 4ohm kicker l7's and he is pushing these with a power ackoustik 5500 mono block d amp.
When the box was near completion (everything except paint) , they test fitted it in the truck and the box sounded great. Now after it has been painted, installed and wired up correctly it sounds like garbage! Just for comparison : I have a single 12'' slim pioneer with a 600 watt/300rms amp in my chevy and in my opinion mine seems to be hitting harder.
His box is ported, but what i believe happened was : The box flexed so much that the air is now being pushed out the seams of the bottom of the box and this is why it is not hitting hard??? When i put my hand under the box i can feel air . Any advice? Could the speakers be blown? How can i test it?
I will take pics and post dimensions soon.
10-05-2011, 02:16 AM
#4
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Originally Posted by htx86chevy
The box flexed so much that the air is now being pushed out the seams of the bottom of the box and this is why it is not hitting hard??? When i put my hand under the box i can feel air .
Last edited by Tonelocs47; 10-05-2011 at 02:22 AM.
10-05-2011, 12:19 PM
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that makes alot of sense. So I guess we will try to seal up all the gaps and try to reduce as much air loss possible...
just an Update though: we went and bought a single ported box from the audio shop just to test out the individual speakers and rule out the speakers being blown and even with this new box they sound like trash. the speakers rattle and sound blown..... is their anyway to repair this or are we SOL? all 4 sound the same. even hooked the speakers up to my amp in my truck to rule out any wiring issues that his truck might have been causing.... any advice? did he just loose 1200.00 on speakers?
just an Update though: we went and bought a single ported box from the audio shop just to test out the individual speakers and rule out the speakers being blown and even with this new box they sound like trash. the speakers rattle and sound blown..... is their anyway to repair this or are we SOL? all 4 sound the same. even hooked the speakers up to my amp in my truck to rule out any wiring issues that his truck might have been causing.... any advice? did he just loose 1200.00 on speakers?
10-05-2011, 12:30 PM
#6
With 4 speakers, especially in a single chambered box, it is an absolute MUST, to have all the speakers wired properly. If one of them is out of phase, it will cancel the others. Make sure they're all wired properly ... and like toneloc said, make sure everything is sealed, except the ports.