The DBX 1231 Dual 31 - Band Graphic Equalizer is a top - notch audio device. It offers dual channels and 31 1/3 octave bands with ISO frequency centers. With a +/- 12 dB input gain range and switchable 40Hz/18 dB per octave low - cut filters, it provides standard yet essential features. Moreover, it has several great extras. The 45 mm faders allow for smooth control, and you can select between +/- 6dB or +/- 15dB boost/cut ranges for precise gain adjustments. It comes with XLR, barrier strip, and 1/4'' TRS connectors for easy installation. Balanced inputs and outputs ensure quiet operation, and the chassis/signal ground lift capabilities help quickly isolate hum. The dbx 12 Series is ingeniously designed for hassle - free use. Precision - engineered, it promises years of maintenance - free operation. The magnetically isolated transformer, electronically balanced/unbalanced inputs and servo balanced/unbalanced outputs, RF - filtered inputs and outputs, and power - off hard - wire relay bypass with a 2 - second power - up delay guarantee compatibility in all installations. Using only the best components, it has a 10Hz to 50kHz frequency response, over 90dB SNR (ref +4dBu), less than 0.005% THD + Noise (1kHz at +4dBu), and interchannel crosstalk of less than - 80dB from 20Hz to 20kHz. All these features are packed in a 3U steel/aluminum chassis. Key features include switchable boost/cut ranges, electronically balanced/unbalanced inputs, servo balanced/unbalanced outputs, RF - filtered inputs and outputs, various connectors, specific input gain range, low - cut filter, ground lift capability, internal power supply transformer, and power - off relay bypass. Technical specs cover input and output connectors, types, impedance, max input/output, bandwidth, frequency response, dynamic range, signal - to - noise ratio, and more.
Using the DBX 1231 Dual 31 - Band Graphic Equalizer is easy. First, connect your audio source to the input connectors (1/4' TRS, female XLR, or barrier terminal strip). Then, connect the output to your amplifier or speakers using the appropriate output connectors (1/4' TRS, male XLR, or barrier terminal strip). You can adjust the input gain within the - 12dB/+12dB range according to your needs. Use the range switch to select either +/- 6dB or +/- 15dB for slider boost/cut. The low - cut switch activates the 40Hz 18dB/octave Bessel high - pass filter to reduce low - frequency noise. Keep an eye on the I/O meter to monitor the signal level. When using it, make sure the operating voltage matches your power supply (100VAC 50/60Hz, 120VAC 60Hz, or 230VAC 50/60Hz). For maintenance, keep the device clean and dry. Avoid exposing it to extreme temperatures or humidity. If there's any issue, check the power connection and the bypass switch first. If the problem persists, it's best to contact a professional technician.
