Mackie HM Series, 4-Channel Headphone Amplifier Rackmount 4-ch x 12 Headphones (HM-400)

This headphone amp is very functional in the system I have

I’ve been waiting for years to buy one of these.Now that it’s here I absolutely love it. Now everyone can grab a set of headphones and hear the production! I would definitely recommend this product to anyone wanting a professional headphone rackmount!Great product. Thanks for helping me live the dream!

Use for band as wired IEMs and also feeds wireless IEMs. I send the feed from the mixer's main or from the mixer's sub/aux into the stereo input and can pan accordingly for each individual output channel (up to 3 input channels for each output channel). The amp is very loud - great job Mackie!

I can't find the seller anymore. It was listed as in very good condition and that it "may have some cosmetic blemishes", which would be fine. But I was sold one with a broken channel. Seriously, the third channel just doesn't work. Can't believe amazon lets things like this slide. For the past few months i've thought I was at fault, and I could get it working by troubleshooting, but I took it to an electronics repair shop and he told me that yes, the preamp board is busted. The return window closed ages ago.

Very good headphone amp clean and clear

As expected from Mackie - low noise, great sound, great features and plenty loud.

Like everything Mackle makes, works great with Grado headphones