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Car Audio Discussion
General Car Audio
If you are planning on buying some bookshelf speakers for under $150
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<blockquote data-quote="PV Audio" data-source="post: 6583379" data-attributes="member: 554493"><p>That's because the T15 is only ported to try and get a bit more bass response, when the cabinet is far too small for that driver to be ported. All that the port is probably doing is raising the enclosure resonance and giving it a HUGE peak in impedance at higher than wanted frequencies, which is likely causing the weakness. Either that or they crossed the speakers over near the end of their frequency response ranges which causes a null when listening on axis (cheap 1st order butterworth x-over). A 2nd order linkwitz-riley would probably have helped, but the enclosure should just be sealed anyway. What they should have done is to put a zobel network in there with it since they're going to be crossing that midrange over pretty high up there since I would be surprised if that tweeter could even yawn below 3000hz but then the high frequencies out of that mid would start beaming and it'd still sound like ****. OR I could be wrong and they're crossing the tweeter over too low which is causing a gap in the midrange in which a series notch filter might help to bring up the output to a smoother level instead of a huge dip then a spike. I could just be wrong on all counts //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</p><p></p><p>I'm sorry if this doens't make logical sense, I think out loud all the time. I'm just typing out loud //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif</p></blockquote><p></p>
[QUOTE="PV Audio, post: 6583379, member: 554493"] That's because the T15 is only ported to try and get a bit more bass response, when the cabinet is far too small for that driver to be ported. All that the port is probably doing is raising the enclosure resonance and giving it a HUGE peak in impedance at higher than wanted frequencies, which is likely causing the weakness. Either that or they crossed the speakers over near the end of their frequency response ranges which causes a null when listening on axis (cheap 1st order butterworth x-over). A 2nd order linkwitz-riley would probably have helped, but the enclosure should just be sealed anyway. What they should have done is to put a zobel network in there with it since they're going to be crossing that midrange over pretty high up there since I would be surprised if that tweeter could even yawn below 3000hz but then the high frequencies out of that mid would start beaming and it'd still sound like ****. OR I could be wrong and they're crossing the tweeter over too low which is causing a gap in the midrange in which a series notch filter might help to bring up the output to a smoother level instead of a huge dip then a spike. I could just be wrong on all counts [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] I'm sorry if this doens't make logical sense, I think out loud all the time. I'm just typing out loud [IMG]//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif[/IMG] [/QUOTE]
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If you are planning on buying some bookshelf speakers for under $150
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