This document is the owner's manual for the Yamaha Q1027, a professional-grade 27-band graphic equalizer designed for concert sound reinforcement and studio recording. It features high-quality performance with low distortion and includes controls for phase switching, ground switching, and input attenuation.
The guide details front panel operations such as power management, equalizer adjustments, peak indicators, and the use of a built-in 40/80 Hz high-pass filter. It also explains rear panel connections including balanced/unbalanced inputs and outputs, phase alignment switches, and voltage selection for general models.
| Number of bands | 27 1/3-octave equalizer bands |
|---|---|
| Input impedance (balanced) | 8 kiloohms |
| Output impedance | 40 ohms |
When set to OUT, it isolates the equalizer section and passes input signals straight to the output, allowing the unit to function as a buffer amplifier.
For general models, set the Voltage Selector switch on the rear panel to your local mains voltage (110-130 or 220-240AC) before plugging in.
The phone jack takes priority over the Cannon socket for both input and output connections.