The Coleman Audio Phone Mix DI is an easy to use interface to blend instrument signals to headphones or use it as a great DI.
Now with the Phone Mix DI you can hear your clients music on the control room monitors instead of a pair of ear buds or the phone's speaker. Easily patch into your system with a pair of mic cables. You also get a great DI box for recording instruments and a headphone output to practice along with the music on the device without disrupting the session in progress.