connect 2 different wire gauge to pos and neg speaker terminal

Thank you Jim.  Al is known for his knowledge and willingness to help others.  He is also much better in explaining things.  Al, have you ever been a teacher?

One last thing. Over, I think it is on the Directionality of wire thread, someone posted a link to a largely mathematical article from, I believe it was the Journal of Physics, that described how energy travels down a conductor. The article was used by the posted to support the popular idea that energy travels completely OUTSIDE the wire, not inside the wire. Yet, that very article - in the first couple of paragraphs - states very clearly that energy is traveling both inside the wire AND outside the wire. The mathematics for both energies are subsequently described. I already acknowledged that (some energy travels outside the conductor) might be true a couple of weeks ago. Furthermore, based on that evidence, the mathematical evidence, I hereby declare this current argument a tie. The peer review tribunal can take a break.

Chalmersiv, the answer to your question is of course not predictable with any kind of certainty, in part because cable effects are dependent to a significant degree on the technical characteristics of what is being connected.  And in the case of a speaker cable, among other things on how the impedance of the speaker varies as a function of frequency, as well as the nominal impedance of the speaker, and perhaps in some cases also on the amplifier's output impedance and on how much feedback its design incorporates.

But as I mentioned earlier the inductance of a speaker cable can be drastically degraded (i.e., increased) if the + and - conductors are not in very close proximity.  Although whatever significance that may have will depend on the impedance of the speaker at high frequencies, and also on the length of the cable.  And I note that the description of the T-14 cites low inductance as one of its key features, while the description of the Q-10 does not.  That despite the fact that the materials used for their conductors and dielectrics are apparently the same.

So for that reason, together with what has been said earlier about the + and - conductors having essentially equal importance, I would recommend against using any of the cheaper wires you listed for the negative conductors.

What I would suggest that you try, if you already haven't, is using BOTH the T-14 and the Q-10 in parallel.  And in each case with the conductors that are enclosed within a given cable jacket being used for BOTH + and - (which if I understand your last post correctly may not have been what you were doing), rather than for just one polarity.  Also, I'm not sure if I understand whether your Q-10 is configured with a sufficient number of connections for biwiring, but if not use it in parallel with the T-14 for the bass connections, and use the additional T-14s alone for the mid/hi connections.

On another note:  Jim & Kijanki, thanks again for the nice words.  Kijanki, in response to your question, no, I have never been a teacher, and I have not ever had any particular desire to be one.  But in my career working in a corporate environment I have always found it advantageous to be able to communicate in as clear and precise a manner as possible.

Also, speaking of being knowledgeable, I'll mention that Jim's (Jea48's) knowledge of all things electrician-related continually amazes me.  And I've certainly learned more than a few things from his posts over the years.  As well as having had the pleasure in various threads here of the two of us successfully resolving more than a few problems people have had with their systems.

Best regards,
-- Al
 

Am I the only one that detects a self congratulatory and self serving tone in that last post? Especially in view of the fact he went to such lengths to answer a question he clams he didn’t even understand. More high hilarity on the forum. The fun never stops 😀