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**HomePageOEMfreeSOFTWARE** · 01-16-2007, 08:55 PM

or to put the aforementioned in laymans terms,
sealed = tighter bass
ported = boomier bass

Not at all if you know what you're doing

For a car you need to take into consideration cabin gain, which increases relative SPL at about 6db/octave under a certain frequency which is determined by the size of the cabin.
Usually a low Q sealed enclosure will give you the flattest frequency responce in a car, ie a larger sealed box than normal. Are you guys that think ported designs sound boomy going purely by systems you've heard in cars? If you are it's because cabin gain probably hasn't been corrected for, so you'll have been listening to a system thats got way too much output under 150Hz; hence boomy sounding.
To give you an idea how much difference this can make my HT room is quite small (12.5x10.5x8 ft) and the room gain is about +20db's at 10Hz, with the gain starting at 100Hz or so. I designed my sub to mirror this curve, hence flat output into infrasonics

droy I'll try and dig up some specs on those woofers and give you an idea where to start [thumbup]

01-16-2007, 08:55 PM	#11
HomePageOEMfreeSOFTWARE Join Date Oct 2005 Posts 516 Senior Member	or to put the aforementioned in laymans terms, sealed = tighter bass ported = boomier bass Not at all if you know what you're doing For a car you need to take into consideration cabin gain, which increases relative SPL at about 6db/octave under a certain frequency which is determined by the size of the cabin. Usually a low Q sealed enclosure will give you the flattest frequency responce in a car, ie a larger sealed box than normal. Are you guys that think ported designs sound boomy going purely by systems you've heard in cars? If you are it's because cabin gain probably hasn't been corrected for, so you'll have been listening to a system thats got way too much output under 150Hz; hence boomy sounding. To give you an idea how much difference this can make my HT room is quite small (12.5x10.5x8 ft) and the room gain is about +20db's at 10Hz, with the gain starting at 100Hz or so. I designed my sub to mirror this curve, hence flat output into infrasonics droy I'll try and dig up some specs on those woofers and give you an idea where to start [thumbup]
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