The Behringer POWERPLAY PRO-XL HA4700 is a headphone amp that makes a perfect addition to your studio setup. This professional headphone amp has 4 quiet, powerful channels that can drive loads down to 8 ohms and offer improved sound performance, comprehensive signal routing, and mixing functions. Each section offers mono/stereo operation, balancing, left/right mute, LED output meter, high and low EQ, balance and volume controls in one rack space. Servo-balanced, gold-plated XLR and 1/4" TRS I/O include 3 headphone outputs per channel, 2 XLR and 2 - 1/4" TRS inputs, and 2 XLR and 2 - 1/4" TRS outputs.