Noise floor is evident at high levels of boost/cut.
From the manufacturer:
The PEQ3300 is a 31-band 1/3 octave, single rack space graphic equalizer.
The frequency range of 20Hz – 20KHz is divided into 31 1/3 octave bands at standard ISO 1/3 octave frequency.
This arrangement provides precise and versatile shaping of the response curves of any audio system.
FEATURES
High pass filter switch enables a 40Hz roll-off
Variable high pass filter from 20Hz to 200Hz
The scale switch selects maximum from 6 dB cut/boost to 12 dB cut/boost; the 6 dB position is for better viewing of the detail response curve
EQ insert/ defeat switch allows quick comparison of PRE and POST EQ signal
Overall level control is for easy level matching with the sound system
Center-detent sliders can easily locate the position without cut or boost for setup reference
Separate LED displays for HPF in, 12dB/6dB range, EQ in/out, Peak warning
19″ rack-mounted
