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<blockquote data-quote="helotaxi" data-source="post: 4246858" data-attributes="member: 550915">There&#039;s a huge difference between rear speakers and rear fill.&nbsp; Running rear speakers (typically 6x9 coaxes) amped to match the front speakers without any processing will totally kill the imaging, staging and frequency response.&nbsp; Properly set up rear fill, is just that though:&nbsp; fill.&nbsp; It should be filtered (high and low pass), attenuated (you shouldn&#039;t be able to tell that there is sound coming from behind you), delayed (you are trying to recreate the ambiance from a large room) and mono (any stereo separation is lost during the reflection off the rear wall of the &quot;room&quot;).&nbsp; Without considering those things, it just won&#039;t sound right.&nbsp; The train of thought with this type of setup is that you are trying to recreate a home STEREO (not theater) and the room that it is in in your car.I subscribe to a different school of thought that says &quot;any ambiance will be captured on the recording, and by adding any of my own I&#039;m deviating from the concept of &#039;high fidelity&#039;.&quot;&nbsp; For that reason I don&#039;t run rear speakers, though I migh be doing a 5.1 system in the next vehicle which is a whole different shooting match.</blockquote>

[QUOTE="helotaxi, post: 4246858, member: 550915"] There's a huge difference between rear speakers and rear fill. Running rear speakers (typically 6x9 coaxes) amped to match the front speakers without any processing will totally kill the imaging, staging and frequency response. Properly set up rear fill, is just that though: fill. It should be filtered (high and low pass), attenuated (you shouldn't be able to tell that there is sound coming from behind you), delayed (you are trying to recreate the ambiance from a large room) and mono (any stereo separation is lost during the reflection off the rear wall of the "room"). Without considering those things, it just won't sound right. The train of thought with this type of setup is that you are trying to recreate a home STEREO (not theater) and the room that it is in in your car. I subscribe to a different school of thought that says "any ambiance will be captured on the recording, and by adding any of my own I'm deviating from the concept of 'high fidelity'." For that reason I don't run rear speakers, though I migh be doing a 5.1 system in the next vehicle which is a whole different shooting match. [/QUOTE]

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