I went EVEN more retro once, and had my speakers wired up with 50 ohm coaxial ethernet cable. It sounded perfectly normal to me despite dire warnings from people about the cable impedance. So I eventually replaced it with some quality cable...
B&Q 30amp mains circuit cable. 80p a metre I think it was ...
It sounds fine to me. Think those people who obsess about solid silver cables and oxygen free copper, are just spending far too much money for far too little gain. Or, showing off. Take your pick
Current setup:
Speakers: Pair of Wharfedale Linton 3XPs with the caps replaced in the crossover networks with modern equivalents (they were shot), and a pair of ten quid Maplin tweeters bunged in (One of the original tweeters was blown - hell, they were free!). Some complain it sounds a bit trebly. I say 'bollocks sounds fine to me' to them...
Speaker stands: Proper spiked stands bought at a party in Glasgow (!) for 25 quid. Before that, they sat on the floor, tilted carefully at the optimim angle to traverse the full diagonal of the room (it's to do with propagation of bass waves, see...?). Speakers are held onto the stands with ... two packets of Blu-Tak.
Speaker Cable: 30amp household wire, as described.
Amplifier: Toshiba SB-M2 amp, 1980s hi-fi system that was my dad's ... Sounds fine to me. I think it's 40 watts a channel. Nowadays, all it's ever used for is the PC ...
Other discretes: The rest of the Toshiba system - a belt-driven turntable with a knackered belt (where the hell will I get a replacement?) and a hand-made cartridge carrier with Tandy replacement stylus, all of course making it heavier than the original, so the counterweight has 4 2p pieces taped onto it to increase its weight and balance the lot (My brother broke the original cartridge after attempting to Superglue a broken stylus back together... idiot!). A radio with a broken FM Stereo/mono selector, so it has a 1p piece jammed in there to 'lock' it into stereo mode. And a tape deck which works flawlessly, so far