Dog pissed on speaker

Get, and, only play, A Salty Dog, by Procul Harum. My best advice.

Your speakers will by a whiter shade of pale...

No need to tell you, he ain't nuttin but a hhoownd dog!

I have no recommendadtions but I appreciate the humor. Sorry to laugh while you are in pain, OP.

I literally laughed out loud when I opened up the recent discussions email and first thing I read was this thread title. 😂 

A bit fussy to do, but an electric varmint fence unit plus a moist pad he'd have to stand on to pee would be a very real disincentive.  Next time, a small female dog might be a better choice.

The easy way would be to get a couple of 'scat mats' from Amazon and put them in front of the speakers. They come in two forms - one just makes loud shrill noises if an animal steps on them and the other actually delivers a shock to them.

Search "electric no pee mat for dog" on amazon

Maybe your dog can hear better than you and he is trying to tell you something - get rid of the speakers.