I've now had these earphones for over a year and I remain breathless at how versatile they are. The below list should give readers of this review a good idea of the kind of sound I have been used to in the past as I have owned the following. IEM's: - Westone W40 - Shure 530/535 SE (Red) - Sennheiser IE8/IE80 - Etymotic ER-4S HEADPHONES: - Sennheiser HD 650 - Sennheiser HD 580 - Audio Technica ATH-W3000 - Audio Technica M50 Just prior to buying the SM64’s, I had decided on the Westone W40’s. I'd heard great things about them and got...