I believe both as I(a few months back)I was running my prepro thru the 26(for movies)
and,AND I FORGOT to turn the vol.down on the 26(high noon)

,put on a cd,WHAT THE FFF.
IT WAS SO LOUD FOR A SPLIT SECOND.tHE AMPS WENT INTO PROTECTION MODE+
saved my speakers 3 woofers,one mid+one tweeter per side.I just sat there for a bit and did a quick
analysis of what I had done.Turned the 26 down to O,rechecked all speakers

.
So for sure BOTH+ now I 4Xcheck pre before putting on any music after watching a movie.
BACK TO THE FUTURE PART2

.