Wondering if anyone on here would know the best/cheapest way to get some audio pumping through it?
Andrew, just for a moment, let's assume it does work.
1) Is there just one speaker?
2) How would you plan to use it? I mean, what do you want? Radio? Ipod? Smartphone? CDs?
Here's why I ask. Almost all music is recorded in stereo, and almost all sources reproduce music in stereo. That means a Left and a Right channel... and that means 2 speakers. The only source I can think of that uses mono, (1 channel, thus only 1 speaker), is AM radio.
So depending on what audio you plan to pump through it, you'll likely need 2 speakers. In a stereo setup, it is not advised to use unmatched speakers. You want the Left channel audio perfectly matched to the Right channel audio. Perhaps you can find another Electrovoice ZX5-90 on Craigslist or somewhere like that.
But if you want stereo and cannot find a matching speaker, you'll really need to get a matching pair. Fortunately, we can point you to an excellent pair for $200. But first, please tell us what you want to do.