For a completely portable interface able to handle both line and instrument level signals, plug into the Focusrite Scarlett 2i4 USB Interface. Built with two pre-amplifiers, a high quality headphone amplifier, gain adjustment, and a 48 V phantom power switch for use with condenser microphones, the 2i4 is surrounded by an attractive anodized aluminum unibody chassis for good looks and proper protection. An upgrade of the previous 2i2, the 2i4 now includes a MIDI input and output as well as four unbalanced RCA outputs to deliver full function for any need that may arise.