Hi there The56Kid, this is not the ideal place in a QQ Poll but have read the last few comments and am just curious of a few details about your speakers and configuration and would like to maybe help you more enjoy old Quads with drums and such in the rears on your surround sound system.,
there's quite a few great old Quads with such mixes and it'd be a shame to miss out on hearing them possibly thru trying something and that could resolve the issue with a bit of tweaking and so on.
How much smaller are your rears are than your fronts?
Are the fronts floorstanding type and the rears bookshelf size?
Also, what low frequency are the various speakers rated to roll off or comfortably handle?
The manufacturers specs may not be 100% accurate but they would give a guide I guess.
Are you running a subwoofer?
If so, what do you have the crossover for low frequencies set to? 80hz? 100hz? 120hz? 60hz?
Setting up the gear in a different way may bring benefits for these and possibly all surround mixes you listen to on your system.
Oh and these Sony Japan Quad SACDs already have a syntyesised Centre and LFE channel which may help 'fill in the gaps' with systems that have, say, imbalanced Front Left & Front Right setup and/or speakers in the rear that cannot handle low bass.
What model is your AVR, speakers and sub please?
All the best, Adam