Stereo graphic 1/3 octave 31-band EQ. 2 rack space unit. Excellent condition mechanical and cosmetic (like new), never rack mounted, light studio use only. All controls and switches cleaned. Super low noise 90db noise floor! Pro-grade performance, excellent parts and design, similar to Rane or 10-series DBX; this is a better offering from Samson than the current (2008) S-series. #9+ condition