If I wanted to make my own speaker cables, is this a good choice for wire?

Interesting that you went from discussing speaker cables to interconnects, with no mention of what you are planning to connect with these cables.

If you are interested in tinned copper wire, you might also take a look at this wire from a well-regarded company.   OTOH, there are many other bulk cables for consideration, depending on your goals.  Tinned copper has its attractions and its uses, which IMO are generally a nice full midrange with a colorful, warmish tone, and full-sounding bass, and that it is best suited in power cords, speaker wire, and interconnects, in that order.  It is just ok in the high frequencies and in resolution.  It does seem however to be one of the few bulk cable choices that can be used, as-is, for PCs, SCs, or ICs.  I have made multiple cables with the Duelund wire, Jupiter  Condenser wire, and old stock Western Electric wire and they all have their own characteristics and strengths, IMO/IME.

if you shared your specific equipment and specific sonic goals, plus your general budget range, you might get more meaningful answers instead of everyone’s generic go-to cables.

Ok then, nice set-up. I did ICs with the previously linked 16awg Jupiter wire, and with Duelund 20awg, both have nice tone and are pretty good overall but are  bettered IMO by my Furutech u-p2.1 ICs.

For SCs, with 100wpc, and depending on the length of your run, you might like the larger 12awg wire mentioned by @needfreestuff .  Duelund makes a twisted pair 12awg in a single cotton casing, just like the 16awg you were looking at.  However if you are trying to buy just one wire to make both SCs and ICs then either the 16awg Duelund or Jupiter would probably be best.

Use connectors from pure copper or silver when possible - plating over the copper/silver is ok. For bananas, the KLE plugs that @williewonka likes should sound nice.  Good luck

It appears the marketing department has hacked into the engineering department’s technical text once again! That Cardas 101 discussed by @esarhaddon does indeed look pretty good but I do find the write-up interesting in that they call the cotton filler material the dielectric and the actual wire insulation a “poly jacket.” Mind games.

The problem with bananas, RCAs, and AC outlets has always been the need for a spring type elastic resistance, which copper is not very good at because it is a softer metal that deforms upon repeated loadings (i.e., plugging in and unplugging).   This is why most bananas, RCAs, and AC outlets are commonly made from an alloy of copper, which of course will be less conductive than copper.  Tellurium copper seems to be the best at about 93% of IACS (Copper is 100-101% IACS), while other alloys sometimes have much lower conductivity like Phosphor Bronze at 19% IACS.  Spades are different since they are actually connected by mechanical compression from the binding posts and have no need for elasticity, which is why it is not uncommon to see pure copper spades.

Interestingly, I thought the KLE bananas used to advertise being silver plated pure copper but after reading the technical write-up in their brochure, it was not so clear to me.  There is a lot of dancing around and referencing IACS but I did not see anywhere that they came right out and said exactly what the pin material is made from, except that it has silver plating and is apparently above 100% IACS in conductivity.  I am sure they are very good, but I get skeptical when I read a technical description that appears to dance around the subject.

@esarhaddon 

I get it, and no slight was intended, at all.  Cardas makes good wire. I was just pointing out the promotional rhetoric in their document that ignored the “poly” dielectric yet referred to the cotton filler as the dielectric, since most DIY’ers prefer cotton.  Marketing slight-of-hand.

@esarhaddon -all good

@tubeguy76 - the post by @stager2  is true, CAT cable can be used to make really good sounding speaker cables.  Here is an older articles explaining one alternative but there are easier methods, I have no idea which would sound best.

I have tried so many wires over the years and currently own PCOCC stranded (Furutech), PCOCC solid core (Harmonic Technology), solid core braided silver (HGA), and others here that I occasionally swap out just for fun.

I can honestly say, that I doubt there are audibly meaningful differences between cables made with ETP copper (100% IACS), OFC copper (101% IACS) and PCOCC copper (102%? IACS).  As an example, even the highly rated Iconoclast speaker cables do not use any type of "perfect surface", "continuous cast", or other fancy processed copper.  The best you can get with their cable line is either OFE (Oxygen-Free Electrolytic Copper - 99.99% pure) or SPTPC (Silver-Plated Electrolytic Tough Pitch Copper), which reminds me of my former DH Labs cables (I remember liking the T-14).  

However, I do seem to perceive differences between solid core and stranded cables and also between dielectrics, with cotton or foamed PE being my favorites.  It is hard to argue with the HT speaker cables that are multiple, small gauge, solid core, strands of individually insulated (with foamed PE), PCOCC copper, resulting in a fairly heavy aggregate gauge of 9 awg or 11 awg, depending on the cable. 

The only thing I have here that I like as well as the HT cables are DIY, multi-strand, solid core copper in cotton cables that are configured in a star-quad geometry with two separate runs for bi-wiring.  The HF run is made from 20 awg wires (four per side) for a 14 awg aggregate per pole, and the LF runs are made from 16 awg wires (also four per side) for a 10 awg aggregate per pole.  For whatever reason, those cables simply sound natural to me and are currently connected to my system.

Not sure why the 47Labs cables are favorites of many but I do understand the preference for solid core copper wire.

,