Hi Hifiberry, I have a very old BOSE 501 V Series speaker that I want to use again for my rasberry pi 3 project. I am not sure if it can be use with Hifiberry amp. My speakers detailed as below.
2 stand speaker
It says compatible with receiver or amplifier rated 4-8 ohms,
10-200w/ch. Impedance 6 ohms I.E.C.
Power rating 100W/CH