i was playing the "Woofer Cooker" and all of a sudden i hear a big SNAP and metal vibrating against metal and i get out of the blazer and look at the sub and amp, and they are PERFECTLY fine... so i get back in and crank it back up.... i still hear the vibration so im looking around inside the car to find out what it was.... I hear it AGAIN except this time the vibrating went away and i heard a large THUMP behind me
turns out the rack on top of my blazer detatched itself due to all the vibration and pressure....
sure did scare the poo out of me though
(im running a 15 inch adire audio tempest w/ a JBL 600.1 @ 4 ohms giving it roughly 300-350 wrms)
Replies (7)
compvr15s on 06/9/2005 16:46:48
LOL have to love that, how is it mounted to the roof? is it bolted through the roof or is there some type of snapping device to hold it on, if its bolt through i would put some thin weather stripping or something to pad that area and then rebolt with some threadlock, and hope is stays intact... back when i had my grand prix my system atcually ripped my mirror off my windshield and took a chunk of the windshield with it, very impressive how bass can do some much damage but we still love to play our music loud...
UKinstaller on 06/10/2005 01:49:22
i blew the luggage rack off of my rodeo with two JL Audio W7 12's with a JL 1000.1 amp. it was vicious.
-UK
lessismorespl on 06/11/2005 22:56:18
I had an Explorer Sport for a comp vehicle w/ 4 Digital Designs 9512e's running off 4 Ample Audio Exonic 3000X's and after about 3 or 4 comps, we started to hear this crazy rattle, and it was the rack on top of the truck coming lose. It actually started shaking the door handles lose also.
I think it is amazing how much SPL can be generated w/in a vehicle. I remember when the SPL Dynamics vehicle from Finland first hit 170 dB's, if you were within 20 ft of the vehicle it felt like a earthquake, people said they could feel it from as far 50 ft.
ssallstar598 on 06/13/2005 16:36:05
WOW.... 170 dBs.... man..... think your heart would skip a beat and start beating to the beat of the music? lol
Beau640 on 06/13/2005 16:48:27
Heh. I know this is going to sound realllyyy stupid....but what reads how much DBs you are putting out? Do capacitor's LEDs tell you? or is there another tool that is used?
ssallstar598 on 06/13/2005 19:35:02
it is a sound pressure level sensor... you can buy a really cruddy one at radio shack for 50 bux but it only reads up to 70 dBs...
the term lab mic which is used in comps i believe is thousands of dollars... you can find several dB readers (they are competition standards but they are close enough to give you a good idea of what you would hit in a comp)
the capacitors leds do nothing but tell the voltage.... which is usually gonna be 12 - 14.5 volts on a 1 farad cap...
lessismorespl on 06/13/2005 20:11:14
There are 2 main meters used to measure SPL, 1 is the Audio Control(there are several versions) and then there is the Term-Lab which is probably the most accurate and is used in all of the major events.
In competition, you are not allowed to set inside your vehicle, w/ the exception of some of the lower classes, and even the lower classes the cutoff is 140 dB's, if you are setting inside the vehicle and hit over 140 dB's, it is recorded as 140. This rule is in almost every sanctioned competition rule book and code of ethics. Yoyu also must use an official CD which is mostly sine waves and sweeps of 30 secs.
You can buy Audio Control Epic-150 or the newer version Epic-160, it is fairly accurate up to 160 dB's, it also has bass enhancement, line driver, and sub-bass freq controls, as well as a voltage meter to track your overall voltage. You can find them as low as $150, most authorized dealers charge $200+ This is probably the most accurate on the market for measuring dB's w/out a professional measuring device. You can buy the cheap ones at Radio Shack, but they are only accurate up to 130 dB's and that one runs like $99, and it is not accurate at all. My Epic-150 measured my car on a 30 sec. sine sweep at 141.2, the Term-Lab measured in on the same sine sweep at 140.8, so it is accurate. Radio Shacks biggest meter rated to be accurate up to 130 dB's could not read my car b/c once it went over 130 it went haywire and started giving off readings of 160-178......which is not physically possible w/ my present system and the way it is set up.
less
turns out the rack on top of my blazer detatched itself due to all the vibration and pressure....
sure did scare the poo out of me though
(im running a 15 inch adire audio tempest w/ a JBL 600.1 @ 4 ohms giving it roughly 300-350 wrms)
Replies (7)
compvr15s on 06/9/2005 16:46:48
LOL have to love that, how is it mounted to the roof? is it bolted through the roof or is there some type of snapping device to hold it on, if its bolt through i would put some thin weather stripping or something to pad that area and then rebolt with some threadlock, and hope is stays intact... back when i had my grand prix my system atcually ripped my mirror off my windshield and took a chunk of the windshield with it, very impressive how bass can do some much damage but we still love to play our music loud...
UKinstaller on 06/10/2005 01:49:22
i blew the luggage rack off of my rodeo with two JL Audio W7 12's with a JL 1000.1 amp. it was vicious.
-UK
lessismorespl on 06/11/2005 22:56:18
I had an Explorer Sport for a comp vehicle w/ 4 Digital Designs 9512e's running off 4 Ample Audio Exonic 3000X's and after about 3 or 4 comps, we started to hear this crazy rattle, and it was the rack on top of the truck coming lose. It actually started shaking the door handles lose also.
I think it is amazing how much SPL can be generated w/in a vehicle. I remember when the SPL Dynamics vehicle from Finland first hit 170 dB's, if you were within 20 ft of the vehicle it felt like a earthquake, people said they could feel it from as far 50 ft.
ssallstar598 on 06/13/2005 16:36:05
WOW.... 170 dBs.... man..... think your heart would skip a beat and start beating to the beat of the music? lol
Beau640 on 06/13/2005 16:48:27
Heh. I know this is going to sound realllyyy stupid....but what reads how much DBs you are putting out? Do capacitor's LEDs tell you? or is there another tool that is used?
ssallstar598 on 06/13/2005 19:35:02
it is a sound pressure level sensor... you can buy a really cruddy one at radio shack for 50 bux but it only reads up to 70 dBs...
the term lab mic which is used in comps i believe is thousands of dollars... you can find several dB readers (they are competition standards but they are close enough to give you a good idea of what you would hit in a comp)
the capacitors leds do nothing but tell the voltage.... which is usually gonna be 12 - 14.5 volts on a 1 farad cap...
lessismorespl on 06/13/2005 20:11:14
There are 2 main meters used to measure SPL, 1 is the Audio Control(there are several versions) and then there is the Term-Lab which is probably the most accurate and is used in all of the major events.
In competition, you are not allowed to set inside your vehicle, w/ the exception of some of the lower classes, and even the lower classes the cutoff is 140 dB's, if you are setting inside the vehicle and hit over 140 dB's, it is recorded as 140. This rule is in almost every sanctioned competition rule book and code of ethics. Yoyu also must use an official CD which is mostly sine waves and sweeps of 30 secs.
You can buy Audio Control Epic-150 or the newer version Epic-160, it is fairly accurate up to 160 dB's, it also has bass enhancement, line driver, and sub-bass freq controls, as well as a voltage meter to track your overall voltage. You can find them as low as $150, most authorized dealers charge $200+ This is probably the most accurate on the market for measuring dB's w/out a professional measuring device. You can buy the cheap ones at Radio Shack, but they are only accurate up to 130 dB's and that one runs like $99, and it is not accurate at all. My Epic-150 measured my car on a 30 sec. sine sweep at 141.2, the Term-Lab measured in on the same sine sweep at 140.8, so it is accurate. Radio Shacks biggest meter rated to be accurate up to 130 dB's could not read my car b/c once it went over 130 it went haywire and started giving off readings of 160-178......which is not physically possible w/ my present system and the way it is set up.
less
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