So I've read the complete discussion ranging from limiting the output of a power amplifier (couldn't stress power enough) to feeding it less signal, the simple answer to the solution is to just add a filter in case a lesser signal causes any glitches. Also, you can mess around with the 2R2 as shown earlier by a respected member but I really doubt that you'll be able to find the resolution you want.

http://www.7pcb.com/