Elysia xfilter 500, Stereo Equaliser, 100% Class-A topology, True stereo link, High and low shelf filter, Resonance-capable highpass and lowpass filter, Two parametric mids with switchable Q, Additional passive high band, Stepped potentiometer (computer-selected), Special low tolerance capacitors, Continuous mass shield, Frequency range: < 10 Hz - 400 kHz (-3.0 dB), Noise: 20 Hz - 20 kHz - 98 dBu, Dynamic range: 20 Hz - 22 kHz 120 dB, Maximum level input/output: +21 dBU, Input impedance 10 kOhm, Output impedance 68 Ohm, Includes: xfilter 500 module without frame, Construction: API Series 500 format