Bose does not claim to simulate stereo, however, it does claim nearly equal distrubtion of sound level in mono. The Groove Tube SFX claims it does provide stereo throughout the venue, but I find this difficult to conceive without checking it out first hand.

As for adding a sub, I hope it has sufficient bottom end so a sub is not needed. If this indeed the case, and/or the lows and be adjusted on the keyboard, it would be a dream come true for small venues and nursing home jobs.

Gary

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Travlin' Easy