Originally Posted by: PRSplaya... If I use the stereo trick, could I run the line out from my computer to the effects return of the amp, or is there a better way?

The whole idea is nothing more complicated than feeding a wide range of frequencies to the speaker at levels that give it a bit of a workout. You could get the same benefit by just playing through it for a while. By feeding full-range music through an amp to it, you can set it up, walk away for a day or three, and get the job done without effort over a short period of time.

And you don't need Mega-Power. The heater winding of a tube amp power transformer puts out 6.3 Volts AC. Fed to an 8 Ohm speaker, that's going to be a whopping 5 Watts! Even a 4 Ohm speaker would only draw 10 Watts. Do the break-in with the speaker sitting on its own on a bench top. Place it on the magnet, facing up, so that there is no air trapped between the cone and a flat surface. You want to let it move freely. And you don't want a cab to make it project sound efficiently. A few days of loud 60 Hz hum will guarranteed make you muy loco.