I've used those amps, Fran...they are pretty awesome. They almost sound like tube (or valve, if you are in UK) amps, they have so much warmth, yet they still have lots of clarity as well.

Speaking of tube amps, I have a buddy who plays a Roland E-70 (that's an oldie!) through TWO Fender Twin Reverb amps...stereo.

He had the Twin Reverbs modified to work better with a full range sounding keyboard by having some kind of crossover installed and added two tweeters in each Twin. They are between the main speakers which are also different from stock...they are full-range Celestion 12".

The Twin Reverbs aren't ear bleedingly loud (but very adequate), but like your Cubes, they have oodles of warmth and character, yet the tweeters allow lots of detail.

They do, however, weigh a lot...a big lot!

A buddy of his uses a single Twin Reverb modified in the same way for use with his acoustic guitar.

We should realize from the outset, that we are actually playing the speaker as it is the last link in the chain.

I've used two Cubes back in the day when I did clinics for Roland and the sound was indeed very impressive, but...FOUR CUBES?!?!?

That would clearly be overkill...but WHAT OVERKILL!!!!

Have you ever actually used all four?

Ian