Hmmm, appears to be much more to it...

The Roland CM-220 is a 3-channel system with a large selection of inputs to accommodate anything you might own. Each channel has its own volume and tone controls. Inputs include 1/4" TRS, 1/8" TRS, RCA phono, digital coax, and balanced XLR and 1/4" TRS inputs. There is also a headphone out for silent practicing late at night. Whatever gear you use the CM-220 is ready to go.

Yea, $700... too much for sure

Amazon has the z2300 for $450, and IMO, that is also too much. Maybe because they are discontinued? Is there a replacement?

Also from Logitech is the z623 200w 2.1, THX certified, for $140. It seems to be the replacement for the discontinued z2300. Any thoughts on the z623?