ATH-M40x Studio Headphones & 4-Channel Headphone Amplifier Bundle

This bundle pairs the ATH-M40x studio monitor headphones with the Rockville RHPA4 four-channel headphone amplifier, built for accurate group monitoring in a small studio. The ATH-M40x is tuned flat across an extended frequency range for accurate audio monitoring, with 40mm drivers, a closed-back circumaural design for strong sound isolation, and 90-degree swiveling ear cups for convenient one-ear checks. A detachable cable and collapsible frame keep it practical for both studio tracking and travel.

The RHPA4 takes a 1/4-inch or 3.5mm input and splits it across four outputs, each with independent volume control, and because every output runs two parallel headphone jacks, the amp can power up to eight pairs of headphones from a single mix. USB power means it runs from a computer, wall adapter, or power bank without extra cabling. Together, the flat-tuned headphones and multi-output amp suit a band or production team tracking and mixing together, where everyone needs to hear the same accurate reference at their own comfortable volume.