I don't know but I am sure it's possible to switch put speakers, take the current one out and have a look at it and measure it, there are plenty of. 5-6" speakers that would work. I am pleased with mine the way it is against the windshield it has a nice surround effect to it like that. They aren't bad for the money and are built like a tank lol. And are very loud with most radios
I still haven't ruled that one out especially knowing how well they sound and they are available at the Pilot truck stop that I pass on my commute to and from work.
A tank for sure.