Can upgraded power cords help my setup?

Try it with some with a free trial, so you aren't out much $ if they don't work out or justify their expense.  Especially from those with a free trial AND also suggest in their advertising that power cords will change your life.

Your peace of mind to know whether it actually perceptibly helps in your particular situation is probably worth the few bucks it will cost to find out.

Either way, your real-world experience and opinion might help guide the next person.

Dave (Dlcockrum), thank you kindly. But, no, I didn’t mean to imply that upgrading the power cords on the wireless LS50s would be any less (or any more) likely to be beneficial than in other applications. I was just suggesting that the uniqueness of the design results in little if any predictability of whatever differences may result, and minimizes the relevance of reported experiences that are based on other systems and setups.

Thanks again. Best regards,
-- Al

Very true Al. Thanks.

Best to you,
Dave

I make (and have sold) my own audio power cables. I usually buy materials thru Newark Electronics, MCM, Parts Express (which I used a lot). I get the Watt IEC connectors or hospital grade/similar and order the 10/12 gauge AC wire and snakeskin to make it pretty. Also Shrink tubing is a very good idea. Just solder, or use the screw in connectors to the plugs AFTER threading the snakeskin/shrink tubing (I do one side then thread the tubing/skin after). I test the plugs for shorts, then plug it in and test the AC power connection before bringing it near the equipment. Using a DVM of course. I think I was paying about $40 in parts, the plugs can be as expensive as you'd like. I have no idea why electricity running thru miles of crappy cabling and romex can be altered by a few feet of high grade AC wire/plus but it can be dramatic. I mainly used them for preamps and esp. power amps. I was a dealer for Mondial (RIP, thanks Klipsh), YBA, NAD, Myryad and a few others. I also have an Associates in Applie Electronics. Not saying this to be pretentious, just I have somewhat of a clue what's going on. Hope this helps. 

Just checking to see if you were reading the response.  Good on you for that.