User manual PIONEER S-W40S

[. . . ] When connecting or disconnecting pin-plugs, be sure amplifier power is OFF. 7 Do not touch the speaker cone's reverberating surfaces as they may be damaged by external force. However, depending on the installation location, color distortion may occur if the speaker system is installed extremely close to the screen off a television set. If this happenscase, turn of the power switch of the television set OFF, and turn it on after 15 to 30 minutes. [. . . ] When the surfaces are very dirty, wipe with a soft cloth dipped in some neutral cleanser diluted five or six times with water, and wrung out well, and then wipe again with a dry cloth. Never use thinners, benzine, insecticide sprays and other chemicals on or near this unit, since these will corrode the surfaces. The subwoofer plays back the bass in monaural, making use of the fact that the human ear loses the sense of direction of low-pitched sound. Since the sense of direction is lost, the subwoofer can be installed almost anywhere. If it is installed too far away, however, the sound from the left and right speakers may become unnatural. The frequency characteristics of the S-W40S combined with satellite speakers are shown below. As shown in these figures, the low frequency range is improved. These special characteristics are obtained in an echoless chamber. The effect of an additional subwoofer in an ordinary listening room is better than the chart indicates when positioned adequately. This is because it has 5 channels in the 20Hz ­ 20kHz frequency range (front left and right, center, and rear left and right) and an independent channel for the subwoofer. With playback of Dolby* Digital, establishment of a special channel for the subwoofer is recommended; and with playback of LFE (Low Frequency Effect: sound effect like the rumbling of the earth, whose purpose is to intensify the force of the video), the SW40S is especially effective. Before making or changing the connections, switch off the power switch and disconnect the power cord from the AC outlet. This connection is for a stereo amplifier or receiver equipped with a SUBWOOFER PREOUT terminal. Connect to the LINE LEVEL INPUT terminal on this unit, using the specially provided RCA plug cord. When connected to the PREOUT terminal for surround center channel on the stereo amplifier or receiver, the bass is heard only on the center channel, so it will be insufficient. 1 POWER switch Pressing once switches the unit ON. 2 Power indicator Illuminates when the power is on. 3 AC power cord Connect to a AC power outlet in the wall. Turn the knob slowly from the MIN position. With this unit, the bass level can be independently set, so do not turn up the bass on the stereo amplifier. [. . . ] (Indicator does not light up when power switch is turned on. Power supply plug is not correctly inserted. Turn the LEVEL knob counterclockwise to lower the level. Place the subwoofer a good distance from speakers. [. . . ]