dbx 1215 - Dual-Channel 15-Band Graphic Equalizer with Switchable 6 or 15 dB Boost/Cut Ranges and RF Filtered Inputs/Outputs in Black Finish

The dbx 1215 Dual-Channel 15-Band Graphic Equalizer is engineered to address the needs of high-demand sound reinforcement environments while providing user-friendly controls for precise audio adjustments. This unit combines professional-grade performance with straightforward functionality, making it an essential tool for both live sound and studio applications. The 1215 offers dual channels of equalization, each featuring 15 2/3 octave bands, allowing for detailed frequency shaping and signal optimization.

One of the standout features of the dbx 1215 is its selectable boost/cut range, which provides either ±6 dB or ±15 dB adjustments. This flexibility allows for fine-tuning of the audio signal, catering to different requirements and preferences. The unit includes high-quality 45 mm faders for precise control, and switchable 40Hz/18 dB per octave low-cut filters to eliminate unwanted low-frequency rumble or noise. The equalizer's inputs and outputs are equipped with RF filters to minimize interference, ensuring clear and uncolored audio reproduction.

The 1215 is designed with versatile connectivity options, including XLR, barrier strip, and 1/4" TRS connectors, providing ease of installation and integration into various audio systems. The inputs are electronically balanced/unbalanced with RF filtering, and the outputs are servo balanced/unbalanced, ensuring reliable signal transmission and noise-free operation. The unit also features chassis and signal ground lift capabilities to quickly isolate and address hum or ground loop issues.

Constructed to be both durable and efficient, the dbx 1215 is housed in a robust 2U steel and aluminum chassis. It includes a magnetically isolated transformer and power-off hardwire relay bypass with a 2-second power-up delay to protect the unit and connected equipment during power cycles. The system's internal power supply transformer provides consistent performance across various operating voltages, including 100VAC, 120VAC, and 230VAC, with a power consumption of 24 watts.

Performance-wise, the dbx 1215 excels with a frequency response extending from <10Hz to >50kHz, ensuring it handles a wide range of audio signals accurately. It boasts a dynamic range of 109 dB to 115 dB and a signal-to-noise ratio of 90 dB to 97 dB, with total harmonic distortion plus noise (THD+Noise) of less than 0.005%. Interchannel crosstalk is minimized to less than -80 dB from 20Hz to 20kHz, contributing to clear and detailed audio performance.

The front panel of the 1215 includes essential indicators and controls. The output level is displayed via a 4-LED bar graph with readings at -10, 0, +10, and +18 dBu. Additional LEDs indicate EQ bypass status, clip detection, low cut activation, and the selected boost/cut range. The recessed function switches for EQ bypass, low cut filter, and range selection are conveniently located for quick adjustments.

Overall, the dbx 1215 Dual-Channel 15-Band Graphic Equalizer offers exceptional audio quality, versatile functionality, and reliable performance, making it a valuable addition to any audio setup requiring precise equalization and signal management.

Features

• Dual-channel 15-band graphic equalizer with 2/3 octave bands
• Selectable ±6 dB or ±15 dB boost/cut range for precise gain adjustments
• 45 mm faders for accurate control
• Switchable 40Hz/18 dB per octave low-cut filters to reduce low-frequency noise
• RF-filtered inputs and outputs for noise-free operation
• Versatile connectivity: XLR, barrier strip, and 1/4" TRS connectors
• Electronically balanced/unbalanced inputs and servo balanced/unbalanced outputs
• Chassis/signal ground lift capability to isolate hum and ground loops
• Internal power supply transformer with power-off hardwire relay bypass and 2-second power-up delay
• Frequency response from <10Hz to >50kHz, ±0.5/-3dB
• Dynamic range of 109 dB to 115 dB
• Signal-to-noise ratio of 90 dB to 97 dB
• Total harmonic distortion plus noise (THD+Noise) <0.005%
• Interchannel crosstalk < -80 dB from 20Hz to 20kHz
• Front-panel indicators for output level, EQ bypass, clip, low cut, and boost/cut range
• Dimensions: 19 x 7.9 x 3.5 inches
• Weight: 8.5 lbs; Shipping weight: 9.5 lbs

Specifications

Inputs

• Connectors: 1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip
• Type: Electronically balanced/unbalanced, RF filtered
• Impedance: Balanced 40kΩ, unbalanced 20kΩ
• Max Input Level: >+21dBu balanced or unbalanced
• CMRR: >40dB, typically >55dB at 1kHz

Outputs

• Connectors: 1/4" TRS, male XLR (pin 2 hot), and barrier terminal strip
• Type: Impedancebalanced/unbalanced, RF filtered
• Impedance: Balanced 200Ω, unbalanced 100Ω
• Max Output Level: >+21dBu balanced/unbalanced into 2kΩ or greater, >+18dBm balanced/unbalanced (into 600Ω)

System Performance

• 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: 90db 97db
• THD+Noise: <0.005%
• Interchannel Crosstalk: <-80dB, 20Hz to 20kHz

Function Switches

• EQ Bypass: Bypasses the graphic equalizer section in the signal path
• Low Cut (recessed): Activates the 40Hz 18dB/octave Bessel highpass filter
• Range (recessed): Selects either +/- 6dB or +/- 15dB slider boost/cut range

Indicators

• Output Level: 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu
• EQ Bypass: 1 LED: red
• Clip: 1 LED: red
• Low Cut: 1 LED: red
• +/-6dB: 1 LED: yellow
• +/-15dB: 1 LED: red

Power Supply

• Operating Voltage: 100VAC 50/60Hz, 120VAC 60Hz, 230VAC 50/60Hz
• Power Consumption: 24W
• Mains Connection: IEC receptacle

Physical

• Dimensions: 19 x 7.9 x 3.5 inches
• Weight: 8.5 lbs
• Shipping Weight: 9.5 lbs