We have to attach some "IFs
" to our comments. If he is using reasonable sized wire, and if he is using something in the range of common Consumer Audio Systems, then likely he won't hear a difference.
However, If he has a massively expensive, and truly transparent and revealing system, then he MIGHT
here a difference.
But for the moment I'm going to assume his system is somewhere in the spectrum of common consumer systems.
The thing you want to avoid is excess spending on the speaker wire. In a recent discussion, someone posted a question about his system. He detailed the system and indicated he has a 40w/ch NAD C320BEE which is their smallest model. But he also indicated he had this very expensive cable -
£7.50/meter, when constructed into a common length cable (3m/10ft), and terminated with QED Banana Plugs, the cable comes to £52.50 for EACH Cable, so £105/pair, which is $132/pair at current exchange rates. I'm OK if he wants to spend that kind of money on speaker wire, but likely that wire did no better job that $0.36/foot wire like this -
In another thread, someone was complaining because they couldn't afford a relatively modest £500 Stereo Amp because it was going to cost him another £500 for wire and cable. Our suggestion to him was - DON'T SPEND £500 ON WIRE AND CABLE.
While others will deny it, there is a reasonable sense of proportion. You do not put $500 speaker wire on a $500 Amp. Better to spend $900 on the amp and $100 on the wire. Though realistically, you could spend $975 on the Amp and $25 on the speaker wire.
Generally, most people spend well under 5% of the total system cost on ALL
wire and cable. So, keep thing reasonable. If you happen to have a $5000 system, then you can probably afford to also spend $500 on wire and cable, you can afford it, but you really only need to spend around $100 to $200 depending on your specific configurations.
I use a percent of system cost, though others disagree, but the goal is to keep thing from getting grossly out of proportion.
Generally, sanity and bounds of reason must rule the day.