Mackie HM-400 4-Channel Headphone Amplifier Radial Engineering the UR816C features digital in/out

the UR816C features digital in/out ports which allow you to connect it (via optical cable) to digital audio devices

Dimensions: W = 6

Most of THR's effects feature VCM effects processors

The HERCULES Auto-Swivel Yoke Hanger GSP38WB PLUS rotates automatically to accommodate different shaped guitars or basses vertically and safely

They’re lightweight and compact and look as professional as they sound

Mackie HM-400 4-Channel Headphone Amplifier Radial Engineering the UR816C features digital in/outFlexible Headphone Amplification Whether you need to expand your home studio headphone monitoring capability or add robust cue mix distribution, the affordable HM Series offers the sound quality, reliability, and flexibility you need to expand your setup. The 19" rackmount HM 400 delivers flexible, robust headphone distribution for studios, practice spaces and more. 4 Channel Headphone Amplifier L R Main Stereo Inputs plus L R Stereo Outputs 7 Segment