Of initial note is the fact that iP-HS5 uses the same audio drivers from iM-590, so we repeat our prior comments here. Following an 8-10 hour burn-in period recommended by Maximo—a step that some earphone companies have claimed unnecessary—we found that iP-HS5 was sonically balanced in a manner that we found immediately appealing, with roughly equal parts of treble, midrange, and bass -— a little extra oomph at the top and bottom -—rather…
