White Instruments-4700 1/3 Octave Equalizer
The 4700 and two channel version, 4700-2, are digitally controlled, R-C active, 28 band, one-third octave graphic equalizers with adjustable high and low-pass filters and 10 memory presets. They are constructed with a full front panel to control every aspect of the equalizer's operation. Factory installed remote control, network and back lighted LCD display options are available. A bypass switch on the rear panel performs a hardwire bypass of the equalizer by connecting the input(s) to the output(s). A mute relay mutes the output(s) on power-up/down to protect the sound system. The servo-balanced input(s) and output(s) (terminal Strip connections) can be operated, unbalanced, without a change in level or dynamic range. Level(s) are adjusted in 0.5dB steps. 
Crossover & Pink Noise Options:
The 4700 (but not the 4700-2) can be equipped with either a crossover network card or a pink noise generator card. These options must be installed by White Instruments at the factory. The crossover options include 2 or 3-way, Bessel, Butterworth or Linkwitz-Riley with 6, 12, 18 or 24dB/octave characteristics.