Crazy 8s Drums Posted May 26, 2018 Report Share Posted May 26, 2018 In sedans, for example, one may think that directing the ports into the cab would produce the greatest volume...but that isn't always the case. Sometimes the ports facing into the trunk can result in the whole trunk acting as an enclosure of larger space and result in even louder volume. Every car is different, and box design and speaker design. Lots of variables in this. This is where some of the art resides...finding out what works best in your car. Orion XTR amplifiers Skar subs Link to comment Share on other sites More sharing options...
guero187 Posted May 26, 2018 Report Share Posted May 26, 2018 my truck is the same way. a lot louder with windows down. and I only have 1 zv5 12 in there . have wondered why as well Link to comment Share on other sites More sharing options...
movepage Posted May 27, 2018 Report Share Posted May 27, 2018 Hi, I am not a SPL master but think it all goes with physics at that level - subs need space to vibrate and available air to move. So having the hatch open may drive more free air in to the front of your woofers , ————————————————————————————————————— HU - Alpine - CDA-9887R Changer - Alpine - CHA-S624 Amp - RF - R600x5 Front Speakers - RF - P165-SI + Alpine SPG-10C2 Rear Speakers - RF - P1650 Sub - RF - P2D4-10 on Vented Box Link to comment Share on other sites More sharing options...
Jessica Posted May 27, 2018 Report Share Posted May 27, 2018 pictures would help in this situation. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
alex912005 Posted May 27, 2018 Report Share Posted May 27, 2018 All cars are louder with a door open, with a window open or even 2 open. I think it's because when it's all sealed up with everything closed, the subwoofers are somewhat under pressure, limiting their movement. When you open a door, suddenly the subs are under less pressure and can move more, making them a little louder. There's also that thing called "the hot seat", when the car is all sealed up on the passenger side with the door open on the driver's side. This way the passenger (victim) feels a lot higher dBs than the driver, making him jump out the car like the seat was hot. There are cars that do 160 dB all sealed up on the dash, but if you open a door and meter in the kick, the score goes up 3 dBs or more, the equivalent of double the RMS. There's also this EXO video where JP's girlfriend broke Scott Bowman's golden rule, which is to never open the door at max volume, because the sudden change in pressure could make the subwoofers bottom out or unload, which would damage them. My Build Log Link to comment Share on other sites More sharing options...
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