Ok my 2 cents ,I own Polk lsim707, 8 ohm 88 eff..The manual saids 20 to 300 watts to drive them.But everyone who has tested these speakers say ,you will need 300 to 350 watts to drive them.I had used a SS amps Adcom,Carver,and others to drive them.Then one day I hooked up my Cayin A 50 TP MK 11 tube integrated amp to drive them...I used the ultralinrar sett5at 35 wpc.and have found no problem driving them...I have a nice size livingroom 28x32 with Cathedral ceilings...ok I dont put the volume up like I'm in a concert hall,put they play loud.Every article I have read saids ,you need power to drive them...the tubes do a great job and they sound great.
Moving away from inefficient/low impedance speaker in order to move to a Tube Amp
I think this is talked about more on the amplifier side...tubes to solid state or vice versa. But as we all know, going with a tube amp requires some effort in choosing the proper speaker. I have Harbeth C7's, which are a very nice speaker....but I'm not willing to spend the money on a high quality 100 watt tube amp. For those that have been in this scenario, please share some additional steps from your journey. Example 1: You had speaker A, but surprisingly found it worked fine with tubes...Example 2: You had speaker A, but it did not sing with tubes, so you found speaker B, and paired it with Tube amp C..... Cheers -Don