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<blockquote data-quote="audioholic" data-source="post: 3587789" data-attributes="member: 549629">Constructive interferance is called sound wave reinforcement. &#039;Interferance&#039; simply means altering the wave&#039;s original intensity (in this situation). This can result in a cut in output (cancellation), or an increase in output (wave reinforcement). When a smooth, controlled and predictable frequency response is desired, interferance as in cancellation OR reinforcement, is generally a bad thing.To the OP, you are mistaking the terms interferance and cancellation. You will gain in some freqs, lose in others. Over all your output is inevitably going to go up, but your frequency is what will likely suffer.9 out of 10 times when someone tries to justify different sized subs, its &#039;big sub for low freqs, small sub for upper freqs&#039;. The reality is, the subwoofer plays the smallest frequency spectrum of any speaker in your system (probably) and does NOT need to have its frequencies sub-divided again. If your sub cannot play the limited range you are asking of it, something is wrong beyond the diameter of the cone.</blockquote>

[QUOTE="audioholic, post: 3587789, member: 549629"] Constructive interferance is called sound wave reinforcement. 'Interferance' simply means altering the wave's original intensity (in this situation). This can result in a cut in output (cancellation), or an increase in output (wave reinforcement). When a smooth, controlled and predictable frequency response is desired, interferance as in cancellation OR reinforcement, is generally a bad thing. To the OP, you are mistaking the terms interferance and cancellation. You will gain in some freqs, lose in others. Over all your output is inevitably going to go up, but your frequency is what will likely suffer. 9 out of 10 times when someone tries to justify different sized subs, its 'big sub for low freqs, small sub for upper freqs'. The reality is, the subwoofer plays the smallest frequency spectrum of any speaker in your system (probably) and does NOT need to have its frequencies sub-divided again. If your sub cannot play the limited range you are asking of it, something is wrong beyond the diameter of the cone. [/QUOTE]

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