Currently I have a very cheap soundbar hooked up to my television and a girlfriend who really doesn’t see the point in having more than that. My dad has a couple of speakers he is no longer using, so I figured maybe I can find a cheap solution to get those hooked up to the TV. The speakers have an impedance of 4 Ohm so most A/V receivers don’t like it. I was wondering if I can get something like a Topping MX3 and connect that via optical to my TV. Question is, how can I find out if the MX3 (or a similar product like the Loxjie A30) do well at 4 Ohm? I can’t really seem to find it and I don’t know anything about passive speakers.