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Speaker wiring for low impedance
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<blockquote data-quote="BoogerMan" data-source="post: 8491237" data-attributes="member: 668837"><p>Short answer: it causes sound cancellation. If you are referring to the guys that have like 8s or 10s in their door panels, that's a different story. They aren't running different sized subs in their box. They will have all 12s or all 15s or all 18s etc.</p><p></p><p>Long answer:</p><p></p><p>If you have two sound sources creating the same sound at the same time/amplitude/etc, there is of course a large change of cancellation. Wave cancellation is when waves of equal energy collide in such a way as you effectively dimish their energy. You can have cancellation without the sound waves being completely cancelled. Some freqs will be diminished, some may even be amplified due to wave reinforcement (same freq/amplitude waves close enough together to reinforce each other, opposite of cancellation).</p><p></p><p>The bottom line is the result will be an uneven frequency response, and one that likely will be all over the place. An EQ could adjust for it somewhat, but not completely.... and I really dont see the advantage of trying to do it.</p><p></p><p>You are simply trying to reproduce a bandwidth of frequencies accurately. A sub in a sealed enclosure gives a nice smooth flat response along the entire bandwidth usually, where as a ported box peaks output at a certain point, dropping off drastically below but remaining relatively flat above this freq (why low tuned boxes can have excellent SQ, contrary to what some people believe). So, why add another speaker of another size/brand/whatever that's going to complicate things?</p><p></p><p>The only real way Ive heard of mixing sub sizes effectively was with a fairly compex xover setup so each sub size played its own frequency band. But you also have to consider how well each sub will perform in its particular bandwidth, how well they will blend together, the transfer function of the vehicle and its huge impact on the sound, etc. Things get very complicated.</p><p></p><p>From</p><p></p><p><a href="http:////forums/subwoofers/91716-mixing-sub-sizes.html" target="_blank">http://www.caraudio.com/forums/subwoofers/91716-mixing-sub-sizes.html</a></p><p></p><p>But hey, if it sounds better to you, then who cares what we say //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif everyone has a preference and opinion.</p></blockquote><p></p>
[QUOTE="BoogerMan, post: 8491237, member: 668837"] Short answer: it causes sound cancellation. If you are referring to the guys that have like 8s or 10s in their door panels, that's a different story. They aren't running different sized subs in their box. They will have all 12s or all 15s or all 18s etc. Long answer: If you have two sound sources creating the same sound at the same time/amplitude/etc, there is of course a large change of cancellation. Wave cancellation is when waves of equal energy collide in such a way as you effectively dimish their energy. You can have cancellation without the sound waves being completely cancelled. Some freqs will be diminished, some may even be amplified due to wave reinforcement (same freq/amplitude waves close enough together to reinforce each other, opposite of cancellation). The bottom line is the result will be an uneven frequency response, and one that likely will be all over the place. An EQ could adjust for it somewhat, but not completely.... and I really dont see the advantage of trying to do it. You are simply trying to reproduce a bandwidth of frequencies accurately. A sub in a sealed enclosure gives a nice smooth flat response along the entire bandwidth usually, where as a ported box peaks output at a certain point, dropping off drastically below but remaining relatively flat above this freq (why low tuned boxes can have excellent SQ, contrary to what some people believe). So, why add another speaker of another size/brand/whatever that's going to complicate things? The only real way Ive heard of mixing sub sizes effectively was with a fairly compex xover setup so each sub size played its own frequency band. But you also have to consider how well each sub will perform in its particular bandwidth, how well they will blend together, the transfer function of the vehicle and its huge impact on the sound, etc. Things get very complicated. From [URL="http:////forums/subwoofers/91716-mixing-sub-sizes.html"]http://www.caraudio.com/forums/subwoofers/91716-mixing-sub-sizes.html[/URL] But hey, if it sounds better to you, then who cares what we say [IMG]//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif[/IMG] everyone has a preference and opinion. [/QUOTE]
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