a difference of 25 feet with 16 gague wire
It depends on the impedance of the speakers; but 25 feet should not be a problem as long as your speakers are not less than 4 ohm, if your speakers are rated at 4 ohm you might want to use 14 gauge wire as 25 feet is considered the maximum length for 16 gauge wire..either way 14 gauge or 16 gauge wire with 4 ohm speakers and above should not damage your amp, 16 gauge wire may effect performance a little...if you are talking about different length wire to each speaker then you should use 12 gauge wire to the longer length and 16 gauge wire to the shorter length.....and even then you may notice some differance in preformance but that would keep it to a minimum...
You are not going to notice any difference at all at the length of 25 feet. If you are going to have 100 feet length then I would advice using a 14 gauge wire. It is not going to have any affect on your amp. Only the speaker resistance will have an affect on your power amplifier. Hope this will help you out.
Yes, but you will not notice it. Keep the same length on BOTH channels. Go with heavier gauge (stranded and labeled as speaker) wire on long runs too. Buy a 12 gauge spool at RadioShack.
