posted
Had a show this Friday night, and it was cccooooooolllllllldddddd, 38 degree's! The batteries did not want to charge up, so we hit 1.4db down from finals, with every thing set the same as finals. I know the air is more dense when cold, and its harder on the charging system too. We have hit this show area before, and have done 1.5db higher also, but during the summer.
Thanks.
-------------------- James Borel We are the Noise. We took on the Beast with a 168.5. Team Planet, Home of the Big Bang. 2000 DBRA World Finals Extreme 9+ 5-10k 5th place winner. 2001 DBRA World Finals Extreme 13+ 7th place winner. Highest score to date, 170.9.
posted
well, i dont have an answer as simple as yes or no, but i do know that when we competed with the jeep if i pumped the a/c before we ran through the lanes my score would be significantly higher. mind you this would be on 85+ dergree days, so the outside would be pretty hot, while the inside was pretty chilly.
-------------------- "WHO NEEDS ACTIONS WHEN YOU'VE GOT WORDS"
Ian Ashton Posts: 1184 | From: Mi | Registered: Jul 2001
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posted
I would guess that there is an optimal temperature that the suspension of the woofer and the coils and the charging system like to be at...and something tells me that it is less then 85 and more then 38 so I am sure that you guys are right. I am also pretty sure that most things are probobly designed to work best at room temperature so if you could keep your car at 72 it would probobly work the best...
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2008 Spring Break Nationals Street B Champion 153.2dB 2008 dBDrag North American Finals 3rd Place Street A 155.0dB
A user of many brands of gear whose name cannot be said Posts: 3172 | From: Canada | Registered: Dec 2000
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posted
1.4 down from finals would be about right. Finals mics were about .9 high and cold temperatures definately affect the suspension on JL's for about another .5!
posted
Ideally, you would want the batteries room temperature, The microphone warm, and the air inside the car cold.
-------------------- Nate Scholten Team Sounds And Motion SS 1-2 3rd place 2004 finals -THE BUILD- ~Our Drinking Team Has A Stereo Problem~ Posts: 4253 | From: Rhinelander,WI | Registered: Dec 1999
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posted
Cold weather affects your port tuning and the "note" of your vehicle. I know you run a sealed setup, but I would imagine that for anyone, you would have to lower the note you play by 2-3 Hz when it is really that cold. Also, was the air in the box warm, or cold also. If it was that cold with a sealed setup, I would think that loosening a sub to equalize the pressure and temperature on each side of the sub would help. Basically if the air inside of the box is "warm" and the air outside of the box is "cold" then the sub won't necessarily move back to its equilibrium position (in this case, the middle) when its not being used. Basically you will have more travel in one direction than the other, that could account for the scores some. And cold air is normally good for readings on the mics. I was at a show where the temp rose about 20 degrees from the morning to the afternoon and everyone lost about a db.
-------------------- Team Shedluv Team Sweep Team Kicker Team JBL
posted
hmmmm wander if keepin ur batteries warm would help should supply a little mire juice i would think or play your sub a little to get them warmed up lol just a thought
-------------------- current sys eXcelon ps709 eXcelon 5.25" components RF power bd1000a1 12" Shocker X-treme Posts: 265 | From: B'ham AL | Registered: Jan 2001
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quote:Originally posted by SPL2000: 1.4 down from finals would be about right. Finals mics were about .9 high and cold temperatures definately affect the suspension on JL's for about another .5!
And what would you know? It's not like you dominated everything you attended this year and people had to make up rules/ go back on their word to stop you from winning and....Oh yeah......That's right......GIVE EM HELL MIKE, and see ya in the lanes next year.........
posted
My 2 cents. When I lived in CO we noticed as temperature dropped it made surrounds less flexible which had a huge impact on SPL. So the cold may not be just affecting your batteries.
Posts: 743 | From: fl | Registered: May 2001
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posted
I have always been told that amps perform their best at about 70 degrees and batteries at room temperature. And the colder the air in the cabin the better. If anyone knows who L&M Electronics are then you would know that they trailer their vehicle in a refreigerated trailer! and they have a metal interior. I was once near when they were having the mic setup in the vehicle and when they opened their car door my nipples got hard!! (they also hit a 172.something!)
posted
All i know is that when temperature decreases, the speed of sound decreases, I don't think this would affect SPL though. As air becomes more dense, the speed of sound increases. Does this mean we want the speed of our waves to decrease to increase SPL?
[ 11-02-2001: Message edited by: Mike De Pace ]
-------------------- Proud owner of a 1987 White Honda CRX.
posted
I always thought, that the denser the air, the harder it is to compress, which in turn makes the amps work harder, and draw more voltage. So, if it's cold, cold hurts batteries, and the way they hold a charge. Now our set up is sealed, which takes more power to start with, but on a ported set up, it might help. Cold should make the mic stiffer to, making it harder to hit high spl, and the inside of an extreme car, in 38 degree weather is like a meat locker. Burrrr. Plus, it was a night show, no sun to warm the car, or batteries.
-------------------- James Borel We are the Noise. We took on the Beast with a 168.5. Team Planet, Home of the Big Bang. 2000 DBRA World Finals Extreme 9+ 5-10k 5th place winner. 2001 DBRA World Finals Extreme 13+ 7th place winner. Highest score to date, 170.9. Posts: 1148 | From: BEREA, KY,USA | Registered: Apr 2000
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posted
When the air is more dense (cold), if you can get your speakers to move to the exact same excursion, you are actually exciting more air molecules than if it is warmer. In almost all aspects, exciting more air is always better for SPL. One thing though, it does take more power to do that, and the cold affects the suspension of your woofers and your amplifiers and batteries. Basically if you have a lot more power than your subs can handle, then you should be able to gain some dB when its cold. If you're already using all of the power that you have, then you could gain (from moving more air) or could lose (subs harder to move), or could stay the same, hard to say. I see the biggest temperature dependance in the Street vehicles. From a 60 degree temperature to an 80 degree temperatue most street vehicles I have witnessed loose around 1 db.
-------------------- Team Shedluv Team Sweep Team Kicker Team JBL
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