I'm in essential agreement with Bob. Although I would say give it a try, and see if the resulting sound is satisfactory to you.
The balance control will allow you to compensate for the slight volume difference between the two speakers that may occur due to their different distances from the listening position. However the arrival time difference (which cannot be compensated for with the balance control) is likely to be more significant, and will result in what are called comb filtering effects on that part of the signals which are common to the two speakers (the mono component of the signals). I believe the subjective result of that will be a slight cloudiness or loss of clarity. But see how it sounds to you -- all of that may be minor enough to be acceptable.
I wouldn't worry about the cable length difference, unless the difference is really extreme and your speakers have very low impedances at some frequencies, which might increase the significance of the differences in resistance and inductance between the two sets of cables.
I don't know what "butt connector" refers to either.
Good luck!
-- Al
The balance control will allow you to compensate for the slight volume difference between the two speakers that may occur due to their different distances from the listening position. However the arrival time difference (which cannot be compensated for with the balance control) is likely to be more significant, and will result in what are called comb filtering effects on that part of the signals which are common to the two speakers (the mono component of the signals). I believe the subjective result of that will be a slight cloudiness or loss of clarity. But see how it sounds to you -- all of that may be minor enough to be acceptable.
I wouldn't worry about the cable length difference, unless the difference is really extreme and your speakers have very low impedances at some frequencies, which might increase the significance of the differences in resistance and inductance between the two sets of cables.
I don't know what "butt connector" refers to either.
Good luck!
-- Al