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<blockquote data-quote="zako" data-source="post: 7624369" data-attributes="member: 629735">If you care about sound staging and imaging, then you shouldn&#039;t run rear speakers unless you employ some kind of advanced processing for them. One standard recommendation is to have then played time delayed L-R difference signal. Having a DSP with surround sound processing (something along the lines of Logic7 or Dolby ProLogic) would take care of this. But without the DSP, you should fade out the rears until your stage is solidly in front of you.Also realize that 20watts is very little power for front speakers. Even the cheapest speakers improve considerably with more power running to them. With the right speakers and good amount of power running to them, you could safely high pass them as low as 60Hz, relieving the subwoofer from playing the higher frequencies. Finally, the subwoofer should not be low passed very high. For most cars, 50-80Hz low pass frequency is the sweet spot. The higher you let the subwoofer play, the less transparent it will be.However, these recommendations are pretty hard to follow with only a 4inch speaker installed in front. Any chance you could move to a bigger woofer?</blockquote>

[QUOTE="zako, post: 7624369, member: 629735"] If you care about sound staging and imaging, then you shouldn't run rear speakers unless you employ some kind of advanced processing for them. One standard recommendation is to have then played time delayed L-R difference signal. Having a DSP with surround sound processing (something along the lines of Logic7 or Dolby ProLogic) would take care of this. But without the DSP, you should fade out the rears until your stage is solidly in front of you. Also realize that 20watts is very little power for front speakers. Even the cheapest speakers improve considerably with more power running to them. With the right speakers and good amount of power running to them, you could safely high pass them as low as 60Hz, relieving the subwoofer from playing the higher frequencies. Finally, the subwoofer should not be low passed very high. For most cars, 50-80Hz low pass frequency is the sweet spot. The higher you let the subwoofer play, the less transparent it will be. However, these recommendations are pretty hard to follow with only a 4inch speaker installed in front. Any chance you could move to a bigger woofer? [/QUOTE]

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