bthmedicinetree,
I worked as an electronic technician for 10 years servicing organs, synths, and amps. You will find some folks that might disagree with me, but I wouldn't waste my money buying monster cables. 99.9 percent of the time they won't make any difference, especially on input cables going into mixers and amps. The whole concept of the Monster cable is mostly hype.
You will get some folks who will tell you about the impedance of the wire and how it could affect the frequency response of the input signal. In theory if the impedance is just right and the frequency of the input signal is just right, that could be true. In real life any good quality shielded cable works just fine throughout the hearing range of the human ear.
If you were pumping out very high wattage between the amp and your speakers you need enough strands of wire to handle the current. A Monster cable in that instance might be called for.
I have in the past, used common speaker wire with plugs purchased at Radio Shaft and made my own cables. I've never had bad results on both the input side of the amp and the output side. They aren't even shielded. Once in a great while if you are close enough to a radio station broadcast tower you might pick up a little radio. Even this happens sometimes with shielded wire.
Many of us use the Logitech speaker systems. I quite sure the cables going to and from the amps are not shielded.
Tom
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Thanks,
Tom