Selection of Hi-Fi Units ?

I have available: Sony 7 Band Graphic Equaliser SEQ-D705 Sony FM Stereo/FM-AM Timer Tuner ST-D705 Technics Stereo Integrated Amplifier SU-Z25 Technics FM/MW/LW Stereo Tuner ST-Z25L The first two form part of a set, missing the amplifier and CD player. The remote control for the system is available, along with coaxial aerial cable, AU bus and system control cables, to allow the units to communicate with each other. The second two form part of a set and I dare say could be used in conjunction with the first two, as the connectors on the back are the common type. All power up fine, and appear to work. 10 for it all.