Maybe i'm wrong on this, but i'm not quite sure. I went to get metered about a week ago to try some different setups of my system. First run i hit 145.6 with the sub firing into the trunk. I turned the box around into the car to see if it would be any louder, the port on the drivers side. But i lost 2 dbs. I know the head rest plays a big part in it so i flipped the box over so the port was on the other side. and the same thing only i hit about .5 dbs higher. Now i'm concidering sealing off the trunk but I dont want to go through all the trouble if i'm gonna loose SPL over it. Plus it sounds louder to the ear firing into the trunk. I My goal is the highest number possible. So any advice would be a really big help
is this for competition only?
if so you need to tune your box to the resonant frequency of your vehicle.
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I want to compete, but its also a daily driver. So are you saying that the only major gains i will get with firing into the car is if i tune to the resonant freq?
anyone who competes...will tune the enclosure and everything to the resonant frequency of their car. it's usually up high around 50-60hz. so it's not good for daily driving.
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Offical dealer for the following-
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ROSEN
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XE DESIGNS
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PAC
LITEGLOW
actually they will tune the box to peak at the resonant frequency of the car. Which is generally 5-7 dbs lower than the res freq. How do you determine that. test test test.
spl is acheived by pressurizing an enclosure "the interior of your car" do you think there will be more pressure in a van using a 10" sub, or in a s10 with a 10" sub, the truck is going to hit allot harder because the sub has less area to pressurise, if you face the sub forward and you seal the trunk from the interior, you just cut the amount of area the sub is pressurising. also by just turning the sub forward and not sealing it off, your dealing with allot of cancelation issues with the sound waves.
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How to aim my subwoofer enclosure
Excellent tutorial ^^^
It actually yields more db by aiming the box to the rear of the vehicle. cancellation == unhappy competitor!
if you seal the trunk off from the cabin your rear firing theory wont hold up/. trust me know lots of people who have done this.
sandmanx wrote:How to aim my subwoofer enclosure
Excellent tutorial ^^^
It actually yields more db by aiming the box to the rear of the vehicle. cancellation == unhappy competitor!
you also realise they didnt test with the box firing forward with the trunk sealed off. only way to get rid of the cancellation is to have the sub box firing from the rear wall. this way no bass waves can get behind the driver, if you aim the subs forward, and then seperate the trunk from the interior, you have made the location of the subs the back wall.
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Assuming you want to remove your backseat for a wall, which would also move you from street/novice to modified. And unless you have the equipment to make that jump, it's best to just aim it towards the rear
OK everyone here has read into the as usual and its gone way off topic.... All I needed was to know if you get any gains on the meter from sealing off the trunk with a single 12" sub firing into the car. as oposed to not sealed firing into the trunk.......
Sndsgood. did you get any gains when you sealed your. Have you ever had your subs firing into the trunk before you sealed the trunk?
Yes, you will get gains from sealing the sub off from the trunk if you are hell bent on firing it forward, but whether or not firing forward will yield more output then firing rearward into the trunk. It isn't always about compression of the sound, if it was then I wouldn't get an extra two decibals with my drivers side door open.
sandmanx wrote:Yes, you will get gains from sealing the sub off from the trunk if you are hell bent on firing it forward, but whether or not firing forward will yield more output then firing rearward into the trunk. It isn't always about compression of the sound, if it was then I wouldn't get an extra two decibals with my drivers side door open.
you only get more db's with your door open because you have cancelation.
fix your install.
sandmanx wrote: It isn't always about compression of the sound
Break down what SPL stands for, then rethink that statement.
Mike Roth
The system has arrived.
i had a single re se 12 with 2500 watt's going to it and i was doing 145-147 with it in the trunk. when i sealed off the trunk i went up to 149-150db's. it does help out and if everything is set right it will also seound better. to me atleast
oh and the scores are from the old mic not the term lab
dvboard found your problem sandmanx, you have cancelation issues, so do allot of people this is the reason they say the bass gets louder if they open a window or a door or the trunk, has to do with box placement and box design.
ive allready told you the answer andrew.
i didnt bother putting my box facing the trunk, i knew ahead of time how i wanted the box and what would give me the best of what i wanted.
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