Subwoofer frequency response

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asi9

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I was listening to a cd the other in a friend of mine's car. She has the basic "rap system", with the 15" subwoofers in the trunk and a 4,435,146,750 watt power amp. Anyway, we were listening to some rock/metal cds. These typically sound like shit in this type of system.... because of the subwoofer all you hear is low end muck. Then we put in one of my favorite cds and and I noticed that it didn't have much low end muck at all. The bass guitar was barely coming through the subs, which kept it from being muddy, and the only thing the subwoofers were really punching on was the KICK DRUM. It sounded awesome!!! If was really clear sounding, and underneath it all you could feel that "doo... doo-doo... doo..." from the kickdrum.

How do subwoofers work? I mean, what are the frequency response ranges, what the hell do those "d-bass" things on sterios do, etc? I wanna know how I could mix it to where the subwoofer mainly pushes the kick drum, if possible.

Fun fact : the funny thing about this is that is that one of the worst sounding cds with the low end muck was a major label release (the band's name is From Zero) that was recorded on an $800,000 budget. The one that was well balanced and really had the kick that kicked was the very same bands independent album they had before they got signed... which they had mixed themselves. :D
 
ooh subwoofers

Chances your friend has a selector on his amp that allows him to select the frequency or if he has a cheaper amp he won't have a variable frequency selector (also called a crossover). If he does not have one chances are the amp will cut off the bass at 80hz. This means that when you mix put the kick drum under 80 hz and the bass guitar over 80 hz. Most subwoofers respond from 50-125hz. 10" subs are usually set to 125 hz, 12" to 80hz and 15" subs are really good at producing those low notes that are around 50hz. Hope this helps :)
 
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