The credits, at the end of the movie had the Quintaphonic Sound and QS Logos. I made a point of staying to see it. In fact, if someone has the laserdisc of the movie, it's there in the closing credits.
FWIW .....It's on the Bluray edition , which offers the original Quintaphonic mix as a discrete 5.0 format .....
and additionally a discrete 5.1 version which is a different mix.