Long Speaker cables

for 25' long cabling I have had great results with networked designs by MIT.
MH750Magnum for speakers
Magnum M1 for unbalanced interconnects

Regarding noise immunity of long interconnects: balanced cables are typically superior in that respect; must be compatible with your equipment of course.

I have been using Mogami W2941 for the longest period of time.These cables are constructed of eight conductors.If configured as a stereo pair (4+4)they equal 10ga.I use them as 30ft.internal biwire which equals 13ga.at the spkr.end.I recently compared them to a 35ft.$4000.00 pair of MIT biwires and sold the MIT's they're that good.Other good choices from Mogami are the W2916(6 cond),and the W3104(4 cond).Many sources to purchase from,and reasonably priced.W2941 is around $7.50ft.W2919 $5.80ft.,and W3104 $4.07ft.Excellent value,used by many recording studios.

I just went through a similar change in my system. I had to change out from a 9' pair of Audience Au24. I made some speaker cable out of 10ga red enameled magnet wire. I bought a spool of it and then cut four 17' lengths and made two braided pairs with bare wire ends. So far I have been very underwhelmed by the sound I am getting. I would guess I have about 25-30 hours on them and I have not heard any improvements. I will give them at least 100 hours before passing final judgement but I don't expect too much. I don't know what would be in the wire that would need break in or dielectric run in.

Sorry that this doesn't provide any suggestions but I thought I might pass on my recent experience for a very similar situation.

Jim