To make it easy to get an idea about the performance of a product this piece is a perfect example. Start your listening on a moderate volume level as it will build up over the course of the track.
It starts with just bass & cello playing the melody (positioned at the right relatively to the front) and then violin/string instruments fill the soundstage (center and left). Seconds later a tuba adds in, woodwinds and trumpets are added. Level increases and a kettledrum makes a first appearance.
This repeats several times while level increases bit by bit.
So what can you judge? First of all, can you clearly position the various instruments? How good is the separation between bass and cello at the beginning. Is the tuba behind the cello/bass? If you have a clear ‘vision’ of the orchestra in the first minute of the track, does this stay if everything gets more dynamic and levels increase? These dynamics are tough for amplifiers and work hard on a Marantz product to get you a clear well arranged orchestra until the end of this piece of music.