I went to a company for a walk thru.

Almost 20 speakers in the ceiling.

A toa amp with the 8 ohm output connected. To a radio shack speaker selector. With a 2wire going to each of 4 zones.

Could these be 8 ohm speakers wired in series or are they 70v speakers playing through the 8ohm output.

Can a 70v speaker play thru a 8 ohm output?