Speaker Cable Questions


Opinions please:

(a) For lengths of approximately 25 feet, is 10 gauge wire preferred over 12 gauge? I suppose 10 gauge is always preferable to 12, or is it?  

(b) Everyone on this forum knows how expensive "quality" cables are. While I haven't checked extensively, I have yet to see any of these quality cables available in 25 foot lengths. if they were I would have to mortgage the house  to buy into them. So the question here is what are the "best" (somewhat subjective I know) cables at 25 foot lengths? (cost no object answers as well as costs commensurate with an Musical Fidelity M6si amp welcome).
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Sorry - 12/2 is just a reference to "12 gauge/2-conductor" extension cords, that classic HD orange cord.  There are also (and maybe more prevalent today) 12/3 cords that also have that separate ground wire and connection.  The 12/2 cord is usually just a little bit more affordable and all you need for speakers.  Also, you probably would do just fine with 14/2 at your 20-25' range and save a little more.  I've used soldered spade lugs and screw-type banana plus in the past and both worked well (the soldered lugs never came undone while a couple of banana screws will probably loosen over the years).
You can find AQ Type 8 around here and there as bulk…a great sounding cable bargain. Blacker blacks…middier mids…highs that won't kill your dog…a tone that says, "you're a wonderful person with great taste."