That is what makes Spatial Speakers so GREAT! Unlike many speakers, you have to have a "certain" amp for them to sing, and a perfect room, setup and etc. These speakers can almost be plunked down and sound good after a break-in. They sound superb with Tubes, Solid State gear. From CD-Vinyl, and they continue to improve the longer they are played. 40 years in this hobby and I tell you this does not happen often when a speaker designs work well in any room, the gear that is good design, Class A, A/B or Class D. 10 watts-400 watts.