I just received my Elac Uni-Fi UB5 speakers, which are 4ohm speakers. My understanding is that they are compatible with an amp that has between 40-140 watts per channel at 4 ohms.

I've ordered an amp that meets the wattage requirement, but it won't be arriving for another week. Since my speakers are already here, I'm pretty excited to try them. My friend has a Yamaha RX-V379 receiver and offered to let me try my new speakers with it, but I'm concerned that it might damage my speakers. The specs for the Yamaha amp says that they have Dynamic Power per channel of 160W at 4 ohms. This is 20 above the top end of the 40-140 watt range for the Uni-Fi UB5 speakers

Will the Yamaha amp damage the speakers, even if I don't go to full volume? Or is it safe to try it out?

Also, what do I need to do to properly break in the speakers?

Edit: I just read the amp manual and it says that it has settings for 8 ohms and 6 ohms. Didn't see 4 ohms. Does that mean I can't use it?

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