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Everything In Music Since 1958
Everything In Music Since 1958

DBX Professional 1231 Dual Channel 31-Band Equalizer

by DBX
Original price $643.92
Original price $643.92 - Original price $643.92
Original price $643.92
Current price $519.00
$519.00 - $519.00
Current price $519.00
♫ In stock
About Inventory Status


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In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


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Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Get Professional Grade Filtering With The DBX Professional 1231 Dual Channel 31-Band Equalizer

The dbx 12 Series were designed to meet the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls. The 1231 provides standard features like dual-channels, 31 1/3 octave bands, ISO frequency centers, /- 12 dB input gain range, and switchable 40Hz/18 dB per octave low-cut filters, but also includes other insightful features. These include 45 mm faders; selectable /-6dB or /-15dB boost/cut range for precise gain adjustments; XLR, barrier strip, and 1/4'' TRS connectors for installation ease; balanced inputs and outputs for quiet operation; and chassis/signal ground lift capabilities for quick hum isolation. The visionary design of the dbx 12 Series makes your job easier.

The dbx 12 Series Equalizers were precision engineered to provide years of maintenance-free operation in any application. 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 2 second power up delay were steps our engineers took to ensure compatibility for all installations. Only the best components were utilized, yielding a 10Hz to 50kHz frequency response, greater than 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 this attention to detail is contained in a 3U steel/aluminum chassis.


  • Switchable boost/cut ranges of +/-6 or +/-15 dB
  • Electronically balanced/unbalanced inputs
  • Servo balanced/unbalanced outputs
  • RF filtered inputs and outputs
  • XLR, Barrier Strip, and 1/4 inch TRS connectors
  • -12dB/+12dB input gain range
  • 18dB/octave 40Hz Bessel low-cut filter
  • Chassis/signal ground lift capability
  • Internal power supply transformer
  • Power-off hardwire relay bypass with 2-second power-up delay


SPECIFICATIONS

  • Input Connectors: 1/4 inch TRS, female XLR (pin 2 hot), and barrier terminal strip
  • Input Type: Electronically balanced/unbalanced, RF filtered
  • Input Impedance: Balanced 40 kOhm, unbalanced 20 kOhm
  • Max Input: +21dBu balanced or unbalanced
  • CMRR: 40dB, typically 55dB at 1kHz
  • Output Connectors: 1/4 inch TRS, male XLR (pin 2 hot), and barrier terminal strip
  • Output Type: Impedance-balanced/unbalanced, RF filtered
  • Output Impedance: Balanced 200 ohm, unbalanced 100 ohm
  • Max Output: +21dBu balanced/unbalanced into 2 kOhm or greater; +18dBm balanced/unbalanced (into 600 ohm)
  • Bandwidth: 20Hz to 20kHz, +0.5/-1dB
  • Frequency Response: 10Hz to 50kHz, +0.5/-3dB; +/-15dB range; +/-6dB range
  • Dynamic Range: 109dB; 115dB
  • Signal to Noise Ratio: 90dB, 97dB
  • THD+Noise: 0.005%
  • Interchannel Crosstalk: -80db, 20Hz to 20kHz
  • Bypass Switch: Bypasses the graphic equalizer section in the signal path
  • Low cut Switch: (recessed): Activates the 40Hz 18dB/octave Bessel high-pass filter
  • Range Switch (recessed): Selects either +/- 6dB or +/- 15dB slider boost/cut range
  • I/O Meter: 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu
  • Indicators: EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6dB (Yellow); +/-15dB (Red)
  • Operating Voltage: 100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60Hz
  • Power Consumption: 24W
  • Power Connector: IEC receptacle
  • Dimensions: 5.25 inch H X 19 inch W X 7.9 inch D (13.4cm x 48.3cm x 20.1cm)

Manufacturer: DBX
Model: 1231
SKU: I052303-N-2-WHXE
UPC: 691991400049


We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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