Professional 31-band equalizer

Extended information

"Single 31 Band Graphic Equalizer
The dbx 3031 Graphic Equalizer is a high performance multifunctional unit designed to deliver all the flexibility and power that professional users demand. Featuring long-throw precision sliders, switchable high- and low-pass filters, balanced / unbalanced connectors, and ultra low-noise performance, the 3031 is more than equal to any critical audio task requirements. The 3031 offers 31 ISO standard center, 1/3 octave constant Q frequency bands in a single package. Selectable 6 or 12 dB of boost/cut gives the user superior signal processing control, while the use of low tolerance components yields accurate frequency centers. Features variable high pass and switchable low pass filters. The unit also includes a passive bypass system that completely removes the equalizer from the audio path when power is off. Also included is an active bypass that allows comparison of the equalized signal with the original.

XLR, barrier strip, and 1/4 inch tip-ring-sleeve connectors make the unit easy to integrate into any type of balanced or unbalanced audio system.

Housed in a rugged 2U EIA standard 19"" cold-rolled steel chassis, the 3031 will stand up to years of abuse, making it a valuable asset for permanent installations or touring companies.

Recording studios, broadcast facilities, sound reinforcement engineers, musicians, and sound contractors alike will find that the straightforward design and versatile signal control options make the 3031 a powerful audio tool.

dbx uses only the highest quality, low tolerance components, ensuring excellent reliability and uncompromising sound quality. From permanent installations to sound contracting, critical audio to sound reinforcement, the dbx 3031 delivers total performance.

Features
ò31 ISO standard center 1/3 octave constant Q frequency bands
òVariable high pass and switchable low pass 12dB/octave filters
òElectronically balanced inputs, servo balanced outputs
òXLR, barrier strip, and TRS connectors
òSwitchable 6 or 12 dB boost/cut
ò-12/+15 dB of input gain
òPassive bypass removes equalizer from signal path when power is off
ò8 segment LED headroom bar graph
òChassis ground lift capability
òToroidal power supply
"

Technical specifications

dbx 3031 Specifications Frequency Response: 20 Hz to 20 kHz, ˜0.1 dB (all faders flat)
Control Centers: 31 ISO Standard, 1/3 octave bands per channel from 20 Hz to 20 kHz: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, and 20k.
High Pass Filter (LO CUT): 12 dB/octave, variable from 25 Hz - 200 Hz.
Low pass filter (HI CUT): 12 dB/octave,15 kHz.
Nominal Control Range: ˜6 dB or ˜ 12 dB cut/boost
Noise Level: <-92 dBu @ ˜6 dB boost/cut range (faders flat, test bandwidth 22 Hz to 22 kHz)
Input Impedance: 75K ohms balanced, 50K ohms unbalanced
Maximum Input Level: +22 dBu (ref.:0.775 Vrms)
Output Impedance: 100 ohms balanced, 50 ohms unbalanced
Maximum Output Level: +22 dBu (ref.:0.775 Vrms)
Dynamic Range: 114 dB
Headroom Indicator: 3 to 42 dB, 8 segments.
THD + Noise: <.003% (at 1 kHz, +4 dBu input, test bandwidth 22 Hz t 22 kHz).
Power Requirements: 100, 120, 230, 240 VAC 50/60 Hz, 30 watts