EQ-215 Constant-Q graphic equalizer. EQ-215 is dual 15-band 2/3 octave equalizer. Low frequency function remoces noise completely, protecting bass speaker. SPECIFICATIONS: • Frequency Bands:2×15 2/3 Octave,ISO Spacing • Input:RF Filtered S ervo-Balanced Input • Input Impedance:20KΩ Unbalanced 40KΩ Balanced • Output Impedance:330Ω.Typical • Frequency Response:20Hz~200KHz,+/-1dB • Noise:>-102dB • THD:0.005% • Channel Separation:Better Than 50dB • Range Of Filter Control:+/-12dB Select • Max. Output Level:+21dB