The Good The Koss PRO DJ100s have a decent sound for a good price. The headphones have an analytical, though not harsh, sound that makes them suitable to budget audiophiles and recording musicians. The headphones seem well-constructed.
The Bad The headphones can make your ears sweaty and are uncomfortable to wear for hours at a time. The headphones aren't able to dig up very much bass and aren't suited to the Monster Beats crowd. The stereo/mono switch is a little bit gimmicky.
The Bottom Line While we can't see many DJs using them, the Koss PRO DJ100s are a decent set of headphones that will expose the detail in your music.
Koss ProDJ100 (Black)
DJ headphones are enjoying a renaissance at the moment buoyed by the street smarts of the Monster/Beats range and a proliferation of cheap music-creation software on portable devices.
Now anyone can be a bedroom (or bathroom, or train, or elevator, or even club) DJ armed with just an iPhone and a $5 app. The dinky earbuds you get with your device can't even cut it for simply listening to music, so trying to check your new mix with them is just a joke.
Enter the Koss Pro DJ100 headphones, which cater to DJs on a budget while still offering many extra features. For example, the Pro DJ100s include a mono/stereo switch on the right earcup designed to give a full mix from one ear for monitoring purposes, DJ-style.