Originally Posted by pinoy ako
1. How do you place the mic after the first measure of ARC? When i used audissey xt32 few months back, i placed the mic left n right and infront of 1st position(1.5ft).
2. Do you measure 5 locations only or should i use all available position? Any advantage if i use all mic position?
The default 5 mic positions is more than adequate for most rooms. I have never done more than 5 myself and have always been happy with my ARC results. People with large HT's with several rows of theater seating may find using the additional mic positions useful.
How large is your listening area ?? How many people usually are there ?? What is the seating situation ??
There are different opinions on the mic positions, but the configuration you describe is fine. The idea is to get a good sampling of the listening area.
First position should always be a the MLP, at ear height, with the mic pointed straight-up, making sure that you have a foot or so clearance from walls or cushions behind. The other positions should be at least 1.5 ft, but 2-3 ft might be better. If there are multiple seats used for listening then you should sample at those positions. If you have just one or two seats used, then work around those seats. I have basically one seat used, since its usually just me listening to music (wife says its too loud) or we share the same seat at the MLP when watching movies together . You need to decide what's best for your room and audience to decide what positions, and how many positions, to use.
I have been using a 'baseball diamond' configuration with very good results. MLP being the pitcher, with positions to the left and right (like 1st and 3rd base) and in front and behind (home plate and 2nd base). I have a small HT --11 x 18 ft-- and use about 2 ft between positions. Works great for me, but make your decision according to your situation. YMMV.