| A preamp is a must. Wheather it be a mixing console or an external unit like the Art Tube MP pictured above. I paid $80 for this simple processor. For a few dollars more, you can get this same piece of equipment with a built in compressor and old style VU meter. A great deal. The unit also has a built in +48V phantom power supply and phase reverse feature. It is a tube preamp and functions on a single 12AX7. Check out ART |