Looking for 6 ohm bookshelf speakers under 9.75" tall

I'm looking for passive speakers for a kind of tight space (9.75" H max). I found ones I like but I'm a little confused about the impedance. They're rated 4-8 ohm but I'm used to speakers having only 1 value, not a range. My receiver only goes down to 6 ohm. Thoughts on these speakers, plus any recommendations?

https://www.miccatron.com/micca-mb42x-g2-bookshelf-speaker/