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Car Audio Discussion
General Car Audio
Adding more Midbass ... double 6.5" or single 8" ... ? ... Ported or Sealed ... ?
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<blockquote data-quote="audioholic" data-source="post: 7396915" data-attributes="member: 549629"><p>No, usually IB works out better than sealed for car audio mids. Again, most car audio mids are mounted in doors, which are not truly infinite baffle, but approach it close enough that they pretty much perform as they would in a true IB situation. So once you take those mids and place them in smaller, sealed enclosures, excursion drops, which mostly hurts low frequency response.</p><p></p><p>Aperiodic membrance can be made to emulate either a (relatively) large sealed box, or even IB, so they tend to work well. But they are complex for the average beginner to tackle.</p><p></p><p>Ported midbass is something I dont have much experience with (beyond listening to them), but with the correct specs for your speakers, and a good calculation program, you can usually get a response that is 'peaky' in the midbass region, but with a wide enough passband that it will work well (because dedicated midbass drivers usually only play a relatively narrow passband anyway). If you port a midrange driver to exaggerate midbass, usually the top end rolls off and flattens out to still give good midrange (not just all midbass), but getting the appropriate magnitude of midbass exaggeration becomes the critical factor. A good proccessor can help with that however.</p><p></p><p>The difficulty you are having getting a good way to accurately plot the midbass response curve is exactly the difficulty I was talking about earlier when I said that ported midbass setups tend to be a bit tricky for beginners.</p><p></p><p>Ive had a couple beers already today and feel I might be getting a bit beyond what I should be discussing in my present condition, so I'll shut up now. //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif Maybe keep_hope_alive will pop in and give some insight into the topic as well. He is much more well versed on this topic than I am anyway.</p></blockquote><p></p>
[QUOTE="audioholic, post: 7396915, member: 549629"] No, usually IB works out better than sealed for car audio mids. Again, most car audio mids are mounted in doors, which are not truly infinite baffle, but approach it close enough that they pretty much perform as they would in a true IB situation. So once you take those mids and place them in smaller, sealed enclosures, excursion drops, which mostly hurts low frequency response. Aperiodic membrance can be made to emulate either a (relatively) large sealed box, or even IB, so they tend to work well. But they are complex for the average beginner to tackle. Ported midbass is something I dont have much experience with (beyond listening to them), but with the correct specs for your speakers, and a good calculation program, you can usually get a response that is 'peaky' in the midbass region, but with a wide enough passband that it will work well (because dedicated midbass drivers usually only play a relatively narrow passband anyway). If you port a midrange driver to exaggerate midbass, usually the top end rolls off and flattens out to still give good midrange (not just all midbass), but getting the appropriate magnitude of midbass exaggeration becomes the critical factor. A good proccessor can help with that however. The difficulty you are having getting a good way to accurately plot the midbass response curve is exactly the difficulty I was talking about earlier when I said that ported midbass setups tend to be a bit tricky for beginners. Ive had a couple beers already today and feel I might be getting a bit beyond what I should be discussing in my present condition, so I'll shut up now. [IMG]//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif[/IMG] Maybe keep_hope_alive will pop in and give some insight into the topic as well. He is much more well versed on this topic than I am anyway. [/QUOTE]
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Adding more Midbass ... double 6.5" or single 8" ... ? ... Ported or Sealed ... ?
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