User manual PIONEER GR-209

[. . . ] If the voltage is not properly set or if you move to an area where the voltage requirements differ, adjust the selector switch as follows. Insert the screwdriver into the groove on the voltage selector, and adjust so that the tip of the arrow points to the voltage value of your area. [. . . ] When this button is pressed, the equalizer ON indicator lights and its functions become operative. When pressed once again, this indicator goes out and the unit's functions are turned OFF. Use this button in the following manner: ON: When using the equalizer to add sound compensation. OFF: When not using the equalizer, but playing back or recording program sources without compensation. The graphic equalizer divides the music source into a number of frequency bands and boost or attenuates the level at each of the frequencies, enabling much finer sound quality adjustments than ordinary tone controls and sound field compensation. Some examples of operation are given below. It can be made flat by adjusting finely the controls on the graphic equalizer. The ideal listening room is one where the transmission frequency response is flat. In actual fact, however, the acoustics vary depending on the effects of the structure of the room and its furniture, and on the listening position. Although there is minimal treble attenuation in a listening room surrounded by hard walls and windows and having a bare floor, the bass sounds are reflected to a great extent. In rooms like this, turn up the 150 Hz control slightly. In a room surrounded by drapes and with carpets on the floor, there is minimal reflection of the sound and both the bass and the treble are absorbed. 8 En In rooms like this, turn up the 60 Hz control slightly and turn up the frequency controls above 2. The above examples are extremely general. [. . . ] Incorrect operations are often mistaken for trouble and malfunctions. If you think that there is something wrong with this component, check the points below. [. . . ]