Is this a silly thing to do?

At present I have my homre AV in my main room, but after digging out my old turntable found my Kenwood 9060 AV amp is poor compared to an old Arcam Alpha 8 amp in stereo.

What I want to know is the reverse of the, one amp-2 pairs of speakers connection box. if I leave the cinema side alone but connect my CD player and TT to the A8, can I then wire it to my Mission 702e speakers as well.

I have my 702e bi-wired with speaker plugs that support two cables each, and only have four cables going to four plugs in each speaker.

Can I not just connect another four cables from the A8 to the 702e on each channel to have the A8 bi-wired as well.

Obviously I hope never to have both amps going together.

Cheers