Burngate wrote: ↑
Tue Sep 25, 2018 5:46 pm
If the amplifier driving it is designed for no less than 8 ohms, then it may well die if you connect a 2 ohm speaker.
If the amplifier doesn't die, then it may well kill the speaker.
Use four of the 2 ohm speakers in series
if you have them (total resistance 8 ohms, if the amp is delivering 1W that's 0.25 per speaker - but whether a "good" sound/volume exists is another matter)
Use a 5.6 ohm 1W resistor in series with the 2ohm speaker - but don't expect much volume ....
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm