Getting stereo audio into the QH4 is made easy with two 1/4-inch balance inputs that would receive line level signals from your mixer or recording interface. In addition, there is a stereo TRS 1/8-inch Aux input jack for direct connection to your smartphone; you can enjoy music from your device and properly drive studio-grade headphones to loud levels.

As a convenience for accommodating large groups of singers and/or your entire band together in the studio, there is an 1/8-inch Aux Out jack that can be used to daisy chain multiple QH4s together.

The Samson QH4A finishes with a global Mute and Mono buttons--monaural monitoring is great for quickly checking a podcast or recordings with split tracks.

Speaking of handy, the QH4 came to the rescue when I needed a third headphone system here at my studio. I had a singer on the first headphone system and a guitarist on my second system but I needed a third system to accommodate a drummer in another room who wanted to play the mix with a loud click track. I just ran two outputs of my interface into the QH4 placed right next to the drummer--problem solved!

The Samson QH4 is a utilitarian and powerful workhorse in a small package. It works great in my studio and is great value for the money. It sells $69.99 MAP.