The Manley Passive Stereo EQ is a 2-channel, 4-band equalizer, with high-pass and low-pass filters. The Manley Passive Stereo EQ does not use active circuitry, there are 5 high-pass filters with bypass and 5 low-pass filters with bypass, each band can be bypassed or set to boost or cut and is capable of a boost up to +20
dB without clipping; the modular design allows future upgrades.