Perhaps a foolish question, but .....

Adam, you can always inexpensively use two "Y" adapters when you listen to the Mono Box Set, then just remove them when you listen to everything else.

Mapman,

This because the CD is produced with the same content in both left and right channels, therefore you will get an image precisely centered between a pair of speakers. This is of course the same effect as a mono cartridge feeding the same signal into both the left and right channel of a stereo phono preamp.

Good Listening

Peter

Thanks Mofimadness .... seems like a simple solution.

Adam...you're welcome. Very easy and cheap to do.

Hah I used to use mono switch a lot when was listening to early Beatles stereo releases. Mono switch helped a lot to mask poor stereo mastering back then.