Originally Posted by ~n00beR
Isn't the maximum continuious output current for the 634 250mA, and the short circuit current is 350mA.
The clipping is probably because you are driving it beyond the max cont current recomendations
, you've done pretty well to get it to run at that level
Just a thought
n00b
Actually, the clipping comes when the voltage swing cant go any higher. 300mW in 300ohm equals ~32mA, so the buf has a lot more to give.
I did not run this in to my headphones
, it is a resistive load (300 ohm) used to test the power I could get out.