that looks very much like one I picked up some 15 years ago at Gateway Electronics (www.gatewayelex.com). I currently use it in the shack but have in years past used in the car. The one I have in my vehicle now is a little round jobber that sort of gives me a retro feeling like I should driving a van in the 1970'ssoncorn said:I found it.
The speaker looks like this.
But with Maxon branding.