The supplied wire is 22. The Crack wire is 20.
Interesting- I wound up buying some 22 awg wire, and it's definitely thicker than what I got with my speedball kit. Some way, some how, my speedball came with wire thinner than 22 awg. Which makes me wonder if I should just rewire the entire speedball with 22 awg wire? About 1/2 the wires were already replaced with the 22 awg wire I bought. The 22 awg I bought- doesn't break!
Crack/Speedball, SEX 2.1/C4S, Bryston BHA-1
Sennheiser HD600/Cardas cable, Beyerdynamic T1 2nd Gen, Hifimam HE560/Hifiman balanced cable