The first question is, can the speaker wires running from the amps or receiver to the left and right channels can be of different lengths? Is there any effect on the delivery of the sound if the wires to the spaekers have different lengths?
Second, up to how long can the wires be so that you can get optimum sound delivery?
Your insights on this is highly appreciated.
Please refer to this table:
http://www.roger-russell.com/wire/wire.htm#wiretableRecommended length depends on gauge and resistance. Using 12 gauge wire at 6 ohms, recommended maximum length is 90 feet. Hence, there will be no problem even if the wires are of different lengths, as long as the length of each does not exceed 90 feet. Since 6 meters lang naman ang longest distance mo, av_phile1 is right (as usual) that if you use 12 gauge wire, the difference in length really wouldn't matter.
Personally, I prefer using same lengths. Even if it wouldn't matter, parang lagi kong naiisip na may tabingi sa setup ko pag alam ko na may wires na hindi pantay ang haba.