The 50X has a 6 pole motor instead of the 4 pole motor in the H220 which will lead to higher torque. The impeller magnet will also have a lower diameter so air and particles can get out of there easier which should fix the air noise problems and make the pump less prone to failure. But it's still basically an evolution of the H220 pump.
I already got me a travel guide for TaiwanBut first CeBit, although many manufacturers aren't there anymore I think...
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