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<blockquote data-quote="Toxic Tuan" data-source="post: 6497846" data-attributes="member: 558678">Actually, the tuning frequency is entire dependent on the environment.&nbsp; Slowly are people starting to realize this.&nbsp; Think about quarter wave, wave development and port resonance.&nbsp; There are peaks that must be considered when tuning.Let me give you another example.&nbsp; If a vehicle&#039;s resonance frequency is at 40 hz, we can expect a gain at around 40 hz.&nbsp; If a customer asks to get bass that is around 40 hz but still retain a good reponse, then we must take the following action.&nbsp; Design a good overall linear response knowing that the actual output will have an environmental gain at 40 hz already.&nbsp; If we don&#039;t take that into consideration and continue to tune the enclosure at 40 hz, we will end up with an extremely peaky enclosure with an extreme peak.&nbsp; These 2 peaks are constructed by the port resonance and vehicle resonance.&nbsp; This would be a horrible design.&nbsp; That&#039;s not the end of the story.&nbsp; Now, if we were very unluck and the vehicle geometry were to be in alignment with a quarterwave gain, then we have a tripple spike at 40 hz.&nbsp; This would be just as bad as a single note gain bandpass design.&nbsp; I haven&#039;t even begun talking about other elements involved...but as you can see, this will create many problems.In all honesty, many enclosure designers or as I call them calculators, do not understand, hear the different, or measure the actual response to know this.&nbsp; But that is where the true advanced designers separate themselves from the pack.&nbsp; Just take a look at Pete from PWK.&nbsp; His designs uses a particle collision derivative that accounts for even more aspects.&nbsp; As a matter of fact, by looking at some of his designs...many people would scratch their heads as in theory...it shouldn&#039;t work...but it does and there is a scientific explanation behind it that has not yet been revealed to the public.&nbsp; Let&#039;s just say that it make LEAP the thing in the past.&nbsp; It has even made DD, one of the best woofer company, a believer.&nbsp; //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifI hope that makes sense.Tuan</blockquote>

[QUOTE="Toxic Tuan, post: 6497846, member: 558678"] Actually, the tuning frequency is entire dependent on the environment. Slowly are people starting to realize this. Think about quarter wave, wave development and port resonance. There are peaks that must be considered when tuning. Let me give you another example. If a vehicle's resonance frequency is at 40 hz, we can expect a gain at around 40 hz. If a customer asks to get bass that is around 40 hz but still retain a good reponse, then we must take the following action. Design a good overall linear response knowing that the actual output will have an environmental gain at 40 hz already. If we don't take that into consideration and continue to tune the enclosure at 40 hz, we will end up with an extremely peaky enclosure with an extreme peak. These 2 peaks are constructed by the port resonance and vehicle resonance. This would be a horrible design. That's not the end of the story. Now, if we were very unluck and the vehicle geometry were to be in alignment with a quarterwave gain, then we have a tripple spike at 40 hz. This would be just as bad as a single note gain bandpass design. I haven't even begun talking about other elements involved...but as you can see, this will create many problems. In all honesty, many enclosure designers or as I call them calculators, do not understand, hear the different, or measure the actual response to know this. But that is where the true advanced designers separate themselves from the pack. Just take a look at Pete from PWK. His designs uses a particle collision derivative that accounts for even more aspects. As a matter of fact, by looking at some of his designs...many people would scratch their heads as in theory...it shouldn't work...but it does and there is a scientific explanation behind it that has not yet been revealed to the public. Let's just say that it make LEAP the thing in the past. It has even made DD, one of the best woofer company, a believer. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] I hope that makes sense. Tuan [/QUOTE]

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