This is a cool unit you should check out - I've got one - it's fun to play with. It's got discrete 4-channel pass-thru with front/rear balance control, separate front/rear matrix adjustment controls and built-in phono pre-amp:
http://www.ebay.com/itm/Akai-SS-1-U...ox-/141124007132?ssPageName=ADME:B:SS:US:3160
http://www.ebay.com/itm/Akai-SS-1-U...ox-/141124007132?ssPageName=ADME:B:SS:US:3160