Sandisk Sansa Clip+ 8gig is it possible for Rockbox to over drive the internal amp?

Since my Sansa clip+ seems to have died on me.  I got to wondering.   I often ran it full volume under the OEM firmware when I had it attached to several iHome speakers.  When I was running it with Rockbox I was running it around 30 to 40 Volume, which is almost full volume.  I noticed that with Rockbox, it seemed that I could make it louder than the original OEM firmware could.  Since it was the sound that finally went bad on it.  I’m starting to wonder if it’s possible that I accidentally allowed rockbox to over drive the internal amp and shorten it’s life.  Do any of you know if that is possible with Rockbox?