My dad listens to a lot of records and likes a surround sound experience even if most of his records don’t take full advantage of it. He needs new rear speakers but isn’t looking to spend much money. He’s specifically looking for 8ohm passive speakers but doesn’t have specific needs beyond that. He tends to prefer floor speakers but is okay with bookshelf too if it’s a much better value for money (and ideally if they can easily be wall-mounted). He hasn’t given me a price point in mind. I’m thinking around $150-200 CAD or less but I don’t know for sure. I sent him a link to a $350 pair of bookshelf speakers and he said that’s more than he wants to spend, so definitely less than that.
He likes my Edifier P12’s but they’re only 6ohm. I tried looking if they have an 8ohm equivalent that doesn’t have Bluetooth/preamp/whatever but I didn’t have much luck.

Makes and models would help, but at normal volumes your speakers he likes would almost certainly be fine. I assume he isn’t trying to blast music at party levels.
He does actually sometimes have it pretty loud. His system is in the basement and sometimes he’ll turn it on and go upstairs or even to their sunroom so it gets cranked up pretty high sometimes. Not on 100 or anything but loud enough that it’s uncomfortable to be in the basement if the record is still playing.
Go dad!
Again, details on the amp would be helpful. Make and model so we can recommend something with a high enough sensitivity.
If I find out I’ll mention it.