I have a 40 foot HDMI cable (thick bugger too) that I got from Monoprice that I put in when I finished my basement. Works like a charm with no extra signal boosters or anything.

be sure to put the cable in place and test it before finishing the drywall or whatever. I've heard some people test cables while they are still rolled up, and then they don't work after putting them in place.

Farewell - June 4, 2020