Quote:
Originally Posted by Baddad
Hi Leon, 
Make sure you maintain the correct polarities. (Red or marked wire to the red/marked terminals Can be different colour sometimes.) Getting it wrong will not damage anything but it affects the sound. The diaphragms of the speakers should be all in sync. If they are out of sync the stereophonic effect suffers.
Cheers |
I think that deserves a qualification... if you reverse the polarity of one (and only one) of the speakers, the stereophonic effect suffers at frequencies - mid bass and above. In the bass and sub bass frequencies you will not notice this effect but you will notice a loss in the perceived power of the bottom end of the system to the tune of 6db due to phase cancellation in this part of the audio spectrum. (Assuming the speakers are placed equi-distant from the listening position)
In a situation which is applicable to professional audio, the loss of the stereo effect would be meaningless to 95% of the audience but the loss of control of (acoustic) power distribution would be unsatisfactory to the majority. Sadly, few PA's are set up well enough for this to be noticeable, let alone a problem.
In any event, you can run a couple of kW down a 6mm^2 conductor over any run length you are likely to consider (domestically) without running in to any problems. If you want to save yourself some money, just cut up a 240v extension cord. Being mindful to cut the male plug end off first.