I would not advise doing this. Speaker cables require a much larger gauge conductor than is typically used in an interconnect cable.
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Morrow Audio cables, at least the early ones (I don't know about current versions), used the same thin solid core wire for both ICs and speaker cables, just a few more strands for the speaker cables. I'm still using them in both roles and like them a lot. Many speaker cable users employ quite thin wires very successfully.
I've been on both sides of this one. As to the thin wires I can assure you it does not sound terrible. Far from it. Back when Listener magazine was alive I read the late Harvey Rosenberg's treatise on thin solid core cables, using Radio Shack magnet wire, and gave it a try between speakers and amps at a time when I was using biwired Kimber 8TC between my SET amps and ProAc Response 3 speakers. Two single strands of 28 gauge magnet wire sounded a hell of a lot better as speaker cables than the Kimber, at that time, in my system, to my ears, though I was not alone.
Since then I've tried thin ribbon cable (Omega Mikro) and everything up to 14 gauge stranded. As noted, I'm back to the thin solid core Morrow Audio IC/speaker wires.
As Clio notes, it can be done and successfully. Try it and see.
If you are adapting to binding posts or banana jacks that have standard 3/4 inch spacing, you can use these adapters, costing $16.60 each:
The manufacturer's data sheet can be found here:
As several people have stated, though, gauge is a major concern. If the center conductor of your interconnect is in the area of 26 or 28 gauge, which is the case for many interconnects, a 10 foot run will have a resistance in the vicinity of 0.5 ohms. That will reduce whatever your amplifier's damping factor is to something less than 16.
If your speakers do not have low impedance at any frequencies, especially in the bass region, and if they do not require a lot of power, and if their woofers do not require tight control by the amplifier, and if the run length is not long, you MIGHT get reasonable results with that kind of gauge.