Home recording studios have become a fact of life with more and more finished products going straight from the spare room to the distributor. As a result there is a need for flexible, professional headphone monitoring sufficient for a number of performers, all at a reasonable cost. Basic headphone amps offer one set of stereo inputs and volume-controlled headphone outputs, however more options are needed in the studio. For example, it may be necessary to connect more than one stereo source - possibly the aux. or monitor output from the mixer plus the stereo output of a tape deck or CD player. It may also be necessary to insert reverb or EQ on certain headphone channels, and to interconnect two headphone amps for additional performers. Naturally, there needs to be a level control for each headset, clean, accurate reproduction and plenty of power.