While Donny is, of course, correct, I will have to agree with Joe. I own two of them and they have been the best small speakers I have ever had. Unless you are in an auditorium, you needn't worry about enough volume.
Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact