Since a short time after i bought this Yamaha decoder in the mid 80s, i never liked it: noise in the back channels along with a bit of distortion and, most importantly, almost impossible to calibrate the surround levels accurately, so...
i do expect to be shocked.

this decoder was still much better than my previous setup, using a home made "Hafler Hookup" surround.

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery