The Rane GE 130 Graphic Equalizer is a single-channel, 30-band, 1/3-octave design in a double rack-space unit, only5 inches deep. Boost/cut range is +12/-15 dB on 45 mm filter slider controls. The active filter sections feature Rane's innovative constant-Q (constant bandwidth) design. This means the bandwidth of each individual filter is guaranteed to be narrow enough to prevent unwarranted interaction between filters, yet wide enough to produce exactly the type of correction curve demanded by even the most unusual acoustic surroundings.