Like Don, I have the Z623 on my desk, and used the Z2200 for years. I still use the sub from the Z2200 when I need one on gigs. You can't go wrong.

Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact