stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
I have to dig out my old radio shack master catalog, but I recall a xx390 chip (I forget the first two letters of the part number) that is a small a/b power amp of its own, with probably enough wattage I would guess to do the job as the driver.
As I recall it runs on plus and minus power rails like the 540, but I am not sure what it's can handle for peak power supply voltage.
This is a much newer type chip and can likely still be had, I will check my catalog tonite and reply tomorrow.