Get the Mackie HM-800 8-channel headphone amp here: https://www.sweetwater.com/store/detail/HM800--mackie-hm-800-8-channel-headphone-amplifier
Get the Mackie HM-400 4-channel headphone amp here: https://www.sweetwater.com/store/detail/HM400--mackie-hm-400-4-channel-headphone-amplifier
And get the Mackie HM-4 headphone amp here: https://www.sweetwater.com/store/detail/HM4--mackie-hm-4-headphone-amplifier
No matter what you're monitoring, Mackie's HM series headphone amplifiers will deliver studio-quality sound. Premium analog circuitry ensures maximum headroom and low noise. And the HM series can endure a great deal of punishment, thanks to Mackie's Built-Like-A-Tank construction.