I Have a bic pl200 and decided with the way my room is setup to put it nearfield (plus now i should be able to fell the bass better with this small sub). My question is now that its so much father from the main speakers should I set the phase control to 180 instead of zero? I've looked at some sites and it says it will help make bass smoother being that the mains are now 11ft away from the sub. Any help will be great!
Thank you in advance... Oh also if I switch the phase control do I have to rerun Audyessey too???
Phase switch IMO is a useless feature. You only have the option of toggling between 0 and 180 and that too for the very frequency in question i.e. crossover. Continuously variable phase knob is far superior to just a 0/180 toggle switch. I won't make it to the bones of this subject coz it will easily de-track the problem at hand.
Anyway, leave the phase switch at 0 position. You can easily blend the sub near-field with your mains by adjusting the sub distance. In your specific case, you have to delay the sub wrt mains such that the sound from your mains and the sub reach the MLP at the same time. You need an SPL meter to adjust the phase, though. However, you can do it by ear also. It won't be that accurate; but it will land you in the ball park.
First set all speakers to small and set XO frequency that you want (usually it's 80hz). Put your avr in 2.1 stereo mode. Run an 80Hz test tone. Both your mains and sub will play it simultaneously. Now adjust the distance of sub in AVR. As you increase/decrease distance; at some point you will hear the test tone dropping in SPL, which means your mains are going out of phase wrt sub. At another point your test tone SPL will increase. Leave the distance of the sub where the test tone is heard at its loudest. That is where your mains will be in perfect phase with sub wrt to your MLP.
I have tried sub location both near-field and far-field i.e. close to the mains. While near-field provided tremendous LFE response; but I figured it did not offer as great re-directed bass. LFE sounded extremely great but after some listening I found it to be unreal. Far-field yielded better results with realistic LFE effects and far superior blending with the mains.
But having said that, it's all up to you whichever placement sounds good to your ears.