loach71

THE BGW SPA-3 is a fine amp. You will most likely need to change the system configuration jumper block AND remove AND replace the filter tuning capacitors and resistors to get the right crossover points for a KHorn. This means a major disassembly of the SPA-3 and solder work on the main control PCB. If you are not familiar with this amp it is very easy to make a mistake. Tim

The JBL 2470 will need threaded throat adapter to work on the EV SM120A. I personally don't like the sound of the phenolic diaphragms -- hence I recommend you get some of the Radian replacement diaphragms for these drivers. I've used most of the JBL 1 inch compression drivers with the EV SM12A horn -- and they do sound very good. I like the sound of this combination better than the stock Klipsch driver and horn..