Ohm load for SET Amps


I've always heard/read/searched that 8-ohm or higher loads are ideal for tube amps.  Speakers are "tube friendly".  I've never really understood why that is the case.  Could anyone with much more experience/wisdom than myself (most, I'd imagine) explain why this is the case?  What would happen if one were to use 4-ohm speakers with a SET amp?

While I have some foundation of physics and electronics, I'm far from an electrical engineer.  

The main reason I ask is because I have a pair of 845 SET's, and would like to consider speakers rated at 4-ohm.  My 845's have 4, 8, 16 ohm taps.

Thanks for any help!
cyberbob

Showing 1 response by audiothesis

What brand are your monos? My Shuguang monos struggled greatly with 4 ohm speakers but were great with 8 ohm. I have found the MastersounD amps to not have a similar issue.