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<blockquote data-quote="helotaxi" data-source="post: 435664" data-attributes="member: 550915">A ported midbass in a Besel alignment will exhibit a perfectly flat response to the tuning freq and roll off at 12dB per octave below that.&nbsp; There will not be a peak in the response.&nbsp; Midbasses will not respond to porting the same way that subs will.&nbsp; Subs get their peak from 1) mistuning and 2) cabin gain.&nbsp; The midbass MUST be tuned correctly and does not get much from cabin gain because of the higher frequency involved.&nbsp; The volume of the enclosure is important but the tuning frequency is even more important for a flat response.&nbsp; There is only one combination of volume and tuning that will yeild a flat response for a given driver.&nbsp; You must match the driver to the space you have available and the frequency you need.&nbsp; If you are set on using a certain midbass, your crossover frequency will be set by what the driver can do.&nbsp; You can&#039;t arbitrarily pick a crossover freq and then expect a given midbass to be able to work with that freq.&nbsp; Also, not all misbasses are suitable for porting, just as not all subs are.&nbsp; You MUST pick the right midbass for the job.As for cancellation, learn about basic acoustics and come back.&nbsp; Unless there is sufficient space between the drivers especially subs for the wave form to get out of phase, there can be no cancellation.&nbsp; Cancellation at higher freqs has nothing to do with speaker aiming and everything to do with phasing as do all cancellation issues.&nbsp; There are cancellation nodes for different frequencies at different locations all around the car.&nbsp; You can find a spot in the car for every frequency of the spectrum where it is totally cancelled and one where it is perfectly in phase.&nbsp; That point will be different for every freq.&nbsp; Aiming of the speakers does not affect where that point is.&nbsp; The reason you aim a high freq speaker is not phasing related.&nbsp; Most speakers exhibit a better frequency response on-axis rather than off-axis.&nbsp; By getting the high freq drivers more on-axis to the listener, the frequency response improves.Basically you are talking about stuff you don&#039;t understand.</blockquote>

[QUOTE="helotaxi, post: 435664, member: 550915"] A ported midbass in a Besel alignment will exhibit a perfectly flat response to the tuning freq and roll off at 12dB per octave below that. There will not be a peak in the response. Midbasses will not respond to porting the same way that subs will. Subs get their peak from 1) mistuning and 2) cabin gain. The midbass MUST be tuned correctly and does not get much from cabin gain because of the higher frequency involved. The volume of the enclosure is important but the tuning frequency is even more important for a flat response. There is only one combination of volume and tuning that will yeild a flat response for a given driver. You must match the driver to the space you have available and the frequency you need. If you are set on using a certain midbass, your crossover frequency will be set by what the driver can do. You can't arbitrarily pick a crossover freq and then expect a given midbass to be able to work with that freq. Also, not all misbasses are suitable for porting, just as not all subs are. You MUST pick the right midbass for the job. As for cancellation, learn about basic acoustics and come back. Unless there is sufficient space between the drivers especially subs for the wave form to get out of phase, there can be no cancellation. Cancellation at higher freqs has nothing to do with speaker aiming and everything to do with phasing as do all cancellation issues. There are cancellation nodes for different frequencies at different locations all around the car. You can find a spot in the car for every frequency of the spectrum where it is totally cancelled and one where it is perfectly in phase. That point will be different for every freq. Aiming of the speakers does not affect where that point is. The reason you aim a high freq speaker is not phasing related. Most speakers exhibit a better frequency response on-axis rather than off-axis. By getting the high freq drivers more on-axis to the listener, the frequency response improves. Basically you are talking about stuff you don't understand. [/QUOTE]

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