It would probably work even better if you'd used ordinary single fine multicore wire. The screen on the coax will probably reduce the signal you are getting.
You could try twisting the screen around the inner core at the opposite end though.
Main system: MMs/ADCs/Deccas/Low output MC's/various SUT's/various arms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT/Swiss Idler jobs. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC, stepped attenuator or valve pre-amp/Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big and smaller dual concentric speakers and full range speakers, amongst others. And too much more to list!