The SPX900 is a highly sophisticated digital reverberation and effects system which offers 50 preset effect programs including accurate simulations of natural reverberation and early-reflections, delay and echo effects, gated effects, modulation effects, a versatile compressor, Aural Exciter®, multiple effects which function as several SPX900 units in one, freeze (sampling) programs and others. With a sampling frequency of 44.1 kHz, it delivers full, flat frequency response from 20 Hz to 20 kHz for exceptionally clean, “transparent” effect sound. The preset effect programs can be edited, re-titled, and stored in any of 49 RAM user memory locations. Individual two-band parametric EQ and dynamic filter parameters are provided for each effect program for precise tonal tailoring.