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Old 12-21-2011, 06:58 PM   #1
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Bass without a top on

Looking for some input here. I'm taking my backseat out and installing a toolbox with two subs built in, but I keep second guessing myself on whether or not i should build a ported box or just a standard sealed. I want to hear good solid bass even driving at 55 with the top off. I keep thinking ported box due to the fact that it moves more air, but I'm not sure if the the moved air will be affected by having all the air moving around it.

Just want some other people's input.

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Old 12-21-2011, 07:29 PM   #2
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i did fine with a ported enclosure. it really comes down to what kind of music you listen to, if you listen to rock go with a sealed box and if you listen to rap go with a ported enclosure. either way the sound is going to be muffled by the wind when driving around without the top on.

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Old 12-21-2011, 07:35 PM   #3
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Idk man. I personally dont like bass and I have a nifty little switch just for turning that down
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Old 12-21-2011, 08:29 PM   #4
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i did fine with a ported enclosure. it really comes down to what kind of music you listen to, if you listen to rock go with a sealed box and if you listen to rap go with a ported enclosure. either way the sound is going to be muffled by the wind when driving around without the top on.
I listen to both. I just put my ipod on shuffle and let it play. I expect the sound to be muffled, but I'm going to do whatever I can to get a full range of sound.


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Idk man. I personally dont like bass and I have a nifty little switch just for turning that down
That's cool. I like to turn it up. Hence the thread. Not piss off every one in the neighborhood loud, but a full range in my music.
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Old 12-21-2011, 08:38 PM   #5
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I have a ported 12" and its great with the top down, the base carries really well even on the highway as long as you can turn up the dB!
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Old 12-21-2011, 09:24 PM   #6
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I have a ported enclosure but also running 1500 watts so driving with the top down isn't s problem. I metered 132db at 32hz with the mic on the passenger floor with a soft-top on.
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Old 12-22-2011, 05:50 PM   #7
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Thats what I was hoping to hear. Thanks for the input.
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Old 01-01-2012, 10:22 PM   #8
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I have a ported enclosure but also running 1500 watts so driving with the top down isn't s problem. I metered 132db at 32hz with the mic on the passenger floor with a soft-top on.
Just so you know, 132 db at 32 Hz will induce almost immediate and permanent hearing damage.


Noise Level (dBA)----Maximum Exposure Time per 24 Hours
85---------------------8 hours
88---------------------4 hours
91---------------------2 hours
94---------------------1 hour
97-------------------–-30 minutes
100------------------- 15 minutes
103------------------- 7.5 minutes
106------------------- 3.7 minutes
109--------------------112 seconds
112--------------------56 seconds
115------------------- 28 seconds
118--------------------14 seconds
121-------------------- 7 seconds
124-------------------- 3 seconds
127---------------------1 second
130–140---------------less than 1 second
140--------------------NO EXPOSURE
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Old 01-02-2012, 06:46 AM   #9
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they play a quick "blurp" that lasts less than a second. no one is in the jeep when its turned that far up.
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Old 01-02-2012, 12:54 PM   #10
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Just so you know, 132 db at 32 Hz will induce almost immediate and permanent hearing damage.
And 132db really isn't all that loud by today's standards. Most of the kids running around with their stereos "bumping" are louder than that. I've sat in the front of some competition vehicles capable of nearly 160db and the air moves so fast it's hard to get a breath. I wear ear protection in vehicles like that but have spent a good amount of time in vehicles capable of mid 140s without protection and I can still easily pass a hearing test.
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Old 01-02-2012, 01:24 PM   #11
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I always tell the same story; I've played live rock on stage for about 30 years. I've worn hearing protection for the last 15 years. That was way too late. I didn't notice any problems until the past two or three years. It will catch up with you. The facts from the world of audiology apply to all humans equally. It's up to the individual to pay attention or ignore those facts.


At 91 decibels, your ears can tolerate up to two hours of exposure.
At 100 decibels, damage can occur with 15 minutes of exposure.
At 112 decibels, damage can occur with only one minute of exposure.
At 140 decibels, immediate nerve damage can occur.
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Old 01-02-2012, 01:28 PM   #12
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And 132db really isn't all that loud by today's standards. Most of the kids running around with their stereos "bumping" are louder than that. I've sat in the front of some competition vehicles capable of nearly 160db and the air moves so fast it's hard to get a breath. I wear ear protection in vehicles like that but have spent a good amount of time in vehicles capable of mid 140s without protection and I can still easily pass a hearing test.
For today while your ears are young maybe......Come talk to us in twenty years....oh yeah you'll have to read lips.
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Old 01-02-2012, 01:31 PM   #13
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It's like starring at the sun, you won't go blind by a glance but overtime you will. We don't doubt that prolong exposure to 100+ db will cause hearing damage but you will not immediately go deaf.

But hearing also deteriorates with age. I'm sure all the elderly with hearing problems didn't blast their 8 tracks to get that way.
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Old 01-02-2012, 09:17 PM   #14
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Originally Posted by marshmallow
Looking for some input here. I'm taking my backseat out and installing a toolbox with two subs built in, but I keep second guessing myself on whether or not i should build a ported box or just a standard sealed. I want to hear good solid bass even driving at 55 with the top off. I keep thinking ported box due to the fact that it moves more air, but I'm not sure if the the moved air will be affected by having all the air moving around it.

Just want some other people's input.
I would recommend a sealed enclosure. IMO the bass sounds better for more types of music and the enclosure only needs to be 1/3 to 1/2 the size of a ported enclosure. More room for tools also.

In regards to hearing loss, I'm pretty sure ears can tolerate low frequencies a lot louder than high frequencies. Since jma was taking measurements from the floor, I assume it was bass getting the high DB's.

Edit: just saw 32hz. Obviously deep bass.
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Old 01-03-2012, 12:17 AM   #15
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a low frequency does a little less harm on your ears, now having your top off, pushing 132Db's, you are only getting about 1/3 of that or less.
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Old 01-03-2012, 02:10 AM   #16
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I like my music loud so I can't really lecture anyone on that...but definitely don't take advantage of your hearing.

I'm only 25...younger than many of you posting on this site. I can still easily pass hearing tests, however I also have lost a large amount of my hearing due to being stupid with using equipment at work without hearing protection, listening to my music way too loud, frequenting rock shows in bars every weekend usually standing in front of the speakers, shooting guns without hearing protection, etc.

So now while I still pass those tests...I also say, "What?" every time someone asks me a question...sometimes multiple times before I finally understand them. I also can be sitting there in completely silence and my ears will start ringing (tinnitus) to the point it feels like I'm listening to a high pitched shriek that I can't turn down. Enjoy your music...just don't be too stupid with it guys. I sure wish I'd worn hearing protection a little more often...it gets embarrassing when I'm talking to girls and I can't understand half their questions without having them repeat them at least once. lol

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