Hi, I was wondering if any ESQ owners out there know the exact model of the sequencer expansion for the ESQ? A potential seller thought that the SQX-1 is for the ESQ, but the instructions say to "turn off the Mirage before installing the cartridge." Can anyone out there clarify if this is supposed to be for either the ESQ, Mirage, or both? Thanks in advance for your responses. Cheers!

I think the SQX-1 is the proper unit, since a lot of the functions of the ESQ-1 work with the Mirage.
I've got a few pieces of old Ensoniq Gear, and I've found this particular site extremely helpful. http://www.op.net/~mikeh/ensoniq.html