The Yamaha YDG2030 Digital Graphic Equalizer was a professional 2-channel 30-band digital EQ designed for precision sound shaping in both live sound and studio environments. It retained all the essential functions of traditional analogue graphic equalisers while incorporating modern digital enhancements that expanded its utility, reliability and control.
At the heart of the Yamaha YDG2030 was a 2-channel 30-band EQ section operating in 1/3-octave bands from 25 Hz to 20 kHz. The system offered both ±12 dB and ±6 dB gain ranges, giving users accurate and flexible tonal control. Each channel also featured independently programmable high-pass and low-pass filters, along with four fully programmable notch filters per channel with variable centre frequency and bandwidth. These were ideal for managing problematic resonances and feedback with surgical precision.
The Yamaha YDG2030 delivered exceptional audio fidelity, with a 110 dB dynamic range, frequency response from 20 Hz to 20 kHz, and total harmonic distortion of less than 0.007 percent. This level of clarity was achieved through 20-bit A/D and D/A converters running at a 44.1 kHz sampling rate, ensuring maximum signal integrity for demanding professional audio applications.
The Yamaha YDG2030’s graphical LCD interface and rotary encoders made it easy to edit and recall settings with speed and accuracy. EQ curves and related parameters could be displayed simultaneously, simplifying programming and live adjustments. A sweep function was also included to quickly identify and correct problematic frequencies, allowing users to boost across the entire spectrum and isolate trouble spots with precision.
In addition to core EQ functionality, the Yamaha YDG2030 featured a programmable delay per channel ranging from 0.7 to 714 milliseconds, useful for speaker alignment and time-domain correction in complex audio systems. Users could store up to 40 complete EQ setups in internal RAM memory, with access available via front panel keys, MIDI control or the Y-485 network interface.
The Y-485 interface allowed multiple units to be controlled remotely using Yamaha’s QS1 Digital Equalizer Control Software. It supported up to 31 units in a single loop and was designed for reliable long-distance control, making it ideal for large-scale installations and scalable reinforcement systems.
Professional balanced XLR inputs and outputs on the Yamaha YDG2030 ensured dependable connectivity. Independent ±20 dB and ±4 dB level selectors were provided for both inputs and outputs to accommodate a variety of signal requirements. Other features included a parameter link function for stereo ganging, a flat key to instantly reset all values to zero, and full emphasis on digital operation.
The Yamaha YDG2030 was a significant development in the evolution of graphic equalisers. Compact, powerful and economical, it combined trusted EQ formats with enhanced control and performance, delivering a high standard of audio quality and versatility for any professional sound application.
Features
- 2-channel 30-band graphic EQ with ±12 dB or ±6 dB gain
- 20-bit A/D and D/A converters with 44.1 kHz sampling
- 110 dB dynamic range with low distortion (<0.007%)
- High-pass, low-pass, and 4 notch filters per channel
- Channel delay from 0.7 ms to 714 ms for alignment
- 40-program internal memory with recall via panel, MIDI or Y-485
- Graphical LCD interface with rotary encoder control
- MIDI and Y-485 network control for multi-unit systems
- Feedback-seeking sweep function for precise EQ correction
- Balanced XLR inputs and outputs with adjustable I/O levels