I use these at my audio workstation, plugged into an audio interface with a good built-in headphone amp. This is important because these headphones seem to be higher impedance than many other popular headphones, including the ATH-M40x, which I also own. Plugged into my audio workstation, these sound amazing, with very detailed bass and clarity throughout the audible frequency range. The frequency response for these seems pretty neutral, which is perfect for monitoring and audio mixing. However, I wouldn't use these unamplified with consumer electronics (e.g., phones, laptops, mp3 players etc.). They take considerably more power to drive than any of my other headphones, so you'll have to crank your volume up to the maximum setting to get something close to decent sound from them. If you're just planning on using these with consumer electronics, I'd suggest getting the ATH-M40x's instead. The 40x's are lower-impedance, have a more colored response (more bass-heavy) and will save you about $50.