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<blockquote data-quote="thylantyr" data-source="post: 1236397" data-attributes="member: 560358">Assuming your woofer allows good performance tuned low and across the midbassregion then nothing happens to the 45hz - 70hz region. But when you play both tones atthe same time you may have SQ issues. You may have some form ofmodulation distortion. But this happens to any subwoofer system playingtwo notes at the same time where the frequency different is alot.For example, lets say you played a 20hz sine wave then feed the woofersome midrange frequencies, perhaps someone talking. The voice will bemodulation akin to you talking into a spinning fan blade. The voice is modulated,sorta like a stobe light effect. When the cone has to move alot, higher excursion,it can&#039;t do &#039;delicate&#039; [lower excursion] upper frequencies when it&#039;s trying to do both.The best bass subsystem is really a two or three part design. One wooferto play upper bass, one woofer to play lower bass and the crazy wooferto do 10hz - 20hz. When you split the job amongst two or three woofers youlessen the effects of modulation, big boost to SQ.</blockquote>

[QUOTE="thylantyr, post: 1236397, member: 560358"] Assuming your woofer allows good performance tuned low and across the midbass region then nothing happens to the 45hz - 70hz region. But when you play both tones at the same time you may have SQ issues. You may have some form of modulation distortion. But this happens to any subwoofer system playing two notes at the same time where the frequency different is alot. For example, lets say you played a 20hz sine wave then feed the woofer some midrange frequencies, perhaps someone talking. The voice will be modulation akin to you talking into a spinning fan blade. The voice is modulated, sorta like a stobe light effect. When the cone has to move alot, higher excursion, it can't do 'delicate' [lower excursion] upper frequencies when it's trying to do both. The best bass subsystem is really a two or three part design. One woofer to play upper bass, one woofer to play lower bass and the crazy woofer to do 10hz - 20hz. When you split the job amongst two or three woofers you lessen the effects of modulation, big boost to SQ. [/QUOTE]

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