BEHRINGER POWERPLAY PRO-XL HA4700 4-Channel Headphones Amplifier System | Rover Store, Inc.
Amazon.com: BRST AC in Power Cord Outlet Socket Cable Plug Lead for Behringer Powerplay Pro-XL HA4700 Power Play Headphones Distribution Amp Amplifier : Electronics
Behringer Powerplay Pro-XL HA4700 4-Ch Headphone Mixing/Distribution Amplifier - Used