Question Heos amp

It will not drive three pair of 8 ohm speakers in parallel.
There are ways around that.
1. If you use impedance matching volume controls for each pair that would let you set the impedance to show 4 ohms to the Heos Amp. It would also let you control the volume of each pair individually.
2. If you connect the speakers to an Impedance matching speaker selector that would work.
3. If you connected two pair in series and the last pair in parallel with the first two pairs that would be safe.