jeepbass1 Posted February 24, 2015 Report Share Posted February 24, 2015 So serious question time why does my system 147.2 when it is 70+ degrees outside and hits a 146.1 when it is 25 degrees outside... anyone have any answers to this.... this is sealed score at the dash....Also I noticed a 1.1 db drop on outlaw scores.....From my understanding electrical resistance is directly proportional to temp changes meaning there should be less resistance at a lower temp greater resistance at a higher temp.... Im Just wondering if the greater air density is the issue... Link to comment Share on other sites More sharing options...
rockFord_Expedition Posted February 24, 2015 Report Share Posted February 24, 2015 For the same reason you can work better in 70 degree weather over 25 degrees. It's fucking cold. Too cold for your electrical to work at it's peak. Just a guess though, kind of. Old School/New School RF Build March 2015 SOTM Winner How to crimp large wire Link to comment Share on other sites More sharing options...
jeepbass1 Posted February 24, 2015 Author Report Share Posted February 24, 2015 Im wondering if the issue has to do with higher air density at a lower temperature and lower air pressure v.s. lower air density at higher temperature and higher air pressure? Link to comment Share on other sites More sharing options...
SteveOrtiz1985 Posted March 2, 2015 Report Share Posted March 2, 2015 From my experience and understanding it is both. More so with the air density. The electrical components do perform better at a nominal temperature (not sure exact range but do know it is above freezing). The air density is the biggest factor. However, Cold air is not more dense than warm air!!! The primary factor in this is humidity, humidity adds "weight to the air and in turn the molecules move more slowly in cold weather. Humidity is moisture (water) and water freezes at 32 degrees. When temperatures are around this area the air becomes more dense. Adversely, if it is too cold (let's say 0 degrees) there is little to no humidity and this variable should be null. I haven't done any actual testing in subzero weather but I would like to. (This last sentence is technically a theory, I have not seen any information to prove it) Link to comment Share on other sites More sharing options...
HHR Ed Posted March 19, 2015 Report Share Posted March 19, 2015 The change in air density is so small with these temperature differences that it does not change anything in 99.9% of the vehicles out there. Peak frequency may shift depending on temperature. What is more of a factor is the pliability of equipment and the vehicle itself. Woofer's can be a bit more rigid in cold temperatures. Also, body panels tend to contract and stiffen up. If your box and car were tuned in the summer time, the added rigidity and contraction in the winter may change the way in which sympathetic vibrations of body panels work with your woofers. Harmonics play a crucial role in street type interiors, change something as little as a door seal and score can change drastically. Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
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