Best wire to connect amplifier binding posts?

Use the following link to figure out gauge:
http://www.csgnetwork.com/wiresizecalc.html

This link has minimal voltage 120V, but all you need to know is output power of your amp.

For example if your amplifier delivers 200wpc, you should specify 2 amps. Use the following Ohm's Law formula Power = product of Voltage and Current thus specifying 2 amps you figure out gauge for 240Watts.

If you have large power amp to avoid large gauge of single conductor i'd recommend to use stranded wire to avoid skin effect. The skin effect tolerances you can view from the following chart: http://www.powerstream.com/Wire_Size.htm and if the tolerance level is high for a specific gauge you'll calculate, using single conductor wire will be more efficient vs. stranded but just by very small notch.

I use DH labs Silver Sonic T-14. Why? Because I have a bunch of it on hand and it's easy to work with.

Skin effect at audio frequencies is a total non-issue. You really don't see the effects until you're up into the MHz+ bands.

Just make sure the wire you use is of good quality and of sufficient gauge to support the anticipated power plus a little extra....

-RW-

RW is partially right with exception to wide bandwidth amps that may actually suffer from such.

I love the sound of solid core copper and always use it in my amps and speakers. Simply sounds better to my ears. Less fuzz and better focus and imaging based on my experience. I build 3 runs of solid core 14-16 gauge teflon coated wire twisted together and like to shield vs not shield.

Makes great speaker cable and power cords also!