Mackie HM-400 4-Channel Headphone Amplifier option-group-EM-300-500-G4 Achieve perfect mounting every time

Achieve perfect mounting every time using the integrated bubble level

Mac systems require a Mac Pro computer with PCI Express slots

ADJ American DJ 12ft PowerCon - 3-Pin DMX Combo Cable

They're clean-sounding

Once in position

Mackie HM-400 4-Channel Headphone Amplifier option-group-EM-300-500-G4 Achieve perfect mounting every timeMackie HM 400 4 Channel Headphone Amplifier The 19" rackmount HM 400 4 Channel Headphone Amplifier offers an incredible amount of versatility and excellent sound quality in a single rack space. Perfect for professional applications including studios, Houses of Worship, practice spaces, and more. The HM 400 features a main input with level control plus stereo outs, aux inputs and EQ per channel with 12 total headphone outputs. Features: L R Main stereo