The TUBE-TECH ME 1B Midrange Equalizer contains a low frequency boost section for peaking, a mid frequency attenuation for dipping as well as a high frequency boost section for peaking. The filter section is of the the passive type followed by a tube based push-pull amplifier to restore the gain. Input and output are balanced as well as fully floating. Input and output transformers come with a static screen between the primary and secondary wirings. Product Features Passive equalizer Tube based push-pull amplifier 5 low frequency peaks: 0.2, 0.3, 0.5, 0.7 and 1 kHz (0 to +10 dB) 11 mid frequency peaks: 0.2, 0.3, 0.5, 0.7, 1, 1.5, 2, 3, 4, 5 and 7 kHz (0 to -10 dB) 5 high frequency peaks: 1.5, 2, 3, 4, 5 kHz (0 to +8 dB) Frequency response @ -3 dB: 5 Hz to 40 kHz Low noise: < -80 dB @ -10 dB gain No insertion loss Clickless In/Out switch