DBX 231 Professional Graphic Equalizer

The DBX 231 Professional Graphic Equalizer features a user-friendly interface with in-depth output and gain reduction metering, two 31-band channels of 1/3-octave equalization, a switchable +6 or +12 dB boost/cut range, 20mm faders, and a +12 dB input gain range.

The input

• Connector: 1/4 “TRS XLR (mother) (2-pin FireWire)
• Type: electronic balance or imbalance, RF (radio frequency) filter
• Impedance: balanced 40K, unbalanced 20KM Minimum input level: > +21 dBu, balanced or unbalanced
• CMRR (common mode rejection ratio): >40 dB; the typical value of 1KHz is >55 dB.

The output

• Connector: 1/4 “TRS (male) XLR (pin 2 hot end)
• Type: balanced or unbalanced impedance, RF (radio frequency) filter
• Impedance: balanced 100, unbalanced 50

System characteristics

• Bandwidth: 20 Hz–20 KHz, 0.5 +/– 1 dBF Frequency response: 10 Hz to 50 kHz; +0.5/-3 dB Dynamic range: 108 dB
• Signal-to-noise ratio: 90 dB
• Internal crosstalk: <  -80 dB, 20 Hz-20 KHz
• Total harmonic distortion and noise: < 0.004%

The Professional Graphic Equalizer function of the switch

• EQ bypass: bypass the graphic equalizer in the signal pathway.
• Low end resection: 131/215:50Hz, 12 dB low pass filter
• 231:40Hz, 12 dB low-pass filter
• Range of choice: the choice of + 6 dB or + 12 to enhance or reduce

Power supply

• Working voltage: 100 v/AC, 50 Hz/60 Hz, 120 v/ 60 Hz, 230 v/AC, 50 Hz/60 Hz
• Power consumption: 131/215:12W
• 231:15W
• Power supply connection: IEC power socket