My ultimate reference for what speakers should sound like is what live performances should sound like. . . in theory. Unfortunately live performances I have attended never sound like what they should. But then, my experience is limited by the Teatro Alla Scala, the Sala Giuseppe Verdi at the Conservatorio DI Milano, The Royal Albert Hall, The Basilica Di San marco in Venice, Notre Dames in Paris, and the Tomsom Hall in Toronto. . . although I do admit that the 16th century portcature in Groznjan (Istra) near Trieste comes very close to sounding right.
So in the end. . . I just follow my ears and hope for the best.
So in the end. . . I just follow my ears and hope for the best.