weather's effect on SPL

[knotdrummer88 10+ year member]

how does stuff like elevation, humidity, and air temperature effect SPL?

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[pro-rabbit 5,000+ posts]

depends on who you ask and how your application is setup.

 

[sacsking916 5,000+ posts]

i can say in my personal experience. higher elevation made my score go down a little. but a little lower to sea level and they raised. i also noticed my woofer, notice i said mine, didnt like when it was hotter outside.

 

[knotdrummer88 10+ year member]

well lets, say were talking just an all out spl machine. a competition vehicle. any general rule of thumb here?

 

[wenn_du_weinst 10+ year member]

a lot of it has to do with air density.

Colder air usually raises your score. If you look at extreme cars a lot of ac's in them

 

[CHEMMINS 10+ year member]

Closer to sea level and colder it is the better....any vehicle. Same concept as intake in your engine.

 

[knotdrummer88 10+ year member]

soooo, lets say for the sake of argument we can have the subs at room temp. what is that like 70 degrees F? something like that, and the air is like just above freezing, would that be good condition(in theory) to achieve a high SPL just based on the the air in the cabin?

 

[sacsking916 5,000+ posts]

soooo, lets say for the sake of argument we can have the subs at room temp. what is that like 70 degrees F? something like that, and the air is like just above freezing, would that be good condition(in theory) to achieve a high SPL just based on the the air in the cabin?

hard to determine, some equipment may perform much better when cold, others may be more likely to fail

 

[stevew007 10+ year member]

my last spl testing. we installed the morning of the show and did a 160.8 in a hot parking lot outside all day.took it home it sat in the garage for 2 weeks nothing touched.we wanted to get a base number before we started deadener. we charged the batts to the same voltage waited for it to drop and hit it with same volume and same freq and it hit a 161.5. this was done back in colorado 5280ft.now according to a few friends that went to finals dbdrag and usaci they gained 1db at the event.but as for a combination of heat and elev I dont know the diff. so i couldent say you could gain 2 db going to lower elev and temp.

then another friend hunter from NM says most people loose db's at finals because they were doing something at shows that they should not have so it drops there score!

PS.

the testing we did at the show and jaffe's meter were dead on.

 

[THATpurpleKUSH 5,000+ posts]

Trying to sqweak out every little bit from that little Autotek huh lol

 

[knotdrummer88 10+ year member]

Trying to sqweak out every little bit from that little Autotek huh lol

haha, no not quite.

Just pure curiosity is all, besides that autotek is a beast. it actually does 1,000,000 watts @ 4 ohms. its fully stable down to .0000000025ohms. I just have the gain turned down right now while I'm breaking in my sub. once it breaks in, Ill get the gain dialed in and start worrying about numbers.

 

[Chaotic_Thought 10+ year member]

From my understanding, temp and elevation alone mean little. The actually difference maker is air density and humidity. However ambient air density and humidity will be relative to location.

Cooler, humid air is more dense and offers less compression than thin dry air. The A/C works great for cooling the air, but it acts as a dehumidifier. So on that assumption, a perfect setup would use a form of radiant cooling with some sort of humidifier?

Yeah, i am guessing here.

 

[hispls 5,000+ posts]

Air density (via cooler air) seems to always help ppl a little. I would strongly suspect lower elevation would help as well. Many reports of running A/C before a run to get the air cool helping. I see a lot of veterans waiting to do runs in evening shows waiting for air to cool off.

 

[THATpurpleKUSH 5,000+ posts]

haha, no not quite.
Just pure curiosity is all, besides that autotek is a beast. it actually does 1,000,000 watts @ 4 ohms. its fully stable down to .0000000025ohms. I just have the gain turned down right now while I'm breaking in my sub. once it breaks in, Ill get the gain dialed in and start worrying about numbers.

fawk, guy who sold me mine said it was the only one //content.invisioncic.com/y282845/emoticons/sneaky.gif.7189749b3a3f769e8815b47e8ae87f88.gif

 

[knotdrummer88 10+ year member]

hm. intresting, thanks all. and thats what i was told too...hmm...this town isn't big enough for the both of us haha