I have ls50s running off a $80 Fosi bluetooth Class D integrated amp bought via Amazon, about 40w/ch, size of a pack of cigarettes. Sound surprisingly good! VEry good even I would say! I was a little shocked when I heard.
They ran very well off a pair of $6000 list price 500w/ch Bel Canto ref1000m monoblocks prior. I have newer ls50 MEtas there now. Was going to sell the original ls50s but they work so well in their new place off a modern amp that cost so little I decided to keep them.
So you just never know. I would not choose to use most affordable tube amps with ls50s. Have yet to hear them sound good that way.
No matter what, you should add a sub capable of filling in below 60 hz or so to as far down to 20 hz as possible always with ls50s for complete results. They are small and cannot deliver muscle in the low bass no matter what. Use white noise (available to stream off internet) and a sound meter app on a smartphone to blend the sub in well. Need not be anything fancy to do that...tools available to most for little or even nothing these days.
They ran very well off a pair of $6000 list price 500w/ch Bel Canto ref1000m monoblocks prior. I have newer ls50 MEtas there now. Was going to sell the original ls50s but they work so well in their new place off a modern amp that cost so little I decided to keep them.
So you just never know. I would not choose to use most affordable tube amps with ls50s. Have yet to hear them sound good that way.
No matter what, you should add a sub capable of filling in below 60 hz or so to as far down to 20 hz as possible always with ls50s for complete results. They are small and cannot deliver muscle in the low bass no matter what. Use white noise (available to stream off internet) and a sound meter app on a smartphone to blend the sub in well. Need not be anything fancy to do that...tools available to most for little or even nothing these days.