Yamaha DSR112 Owner's Manual - Page 7

Controls and Functions Rear panel Controls and Functions English          !        DSR112 / DSR115 / DSR215 DSR118W  INPUT jacks These are balanced XLR and phone input jacks. The DSR118W has XLR jacks (L, R) only. NOTE You may use either the XLR or the phone jack, but not both types simultaneously. Please connect to only one of these jacks.  THRU jack(s) These are balanced XLR output jack(s). Input signals will be passed through unaffected, since these are parallel connected to the INPUT jacks.  PEAK Indicator Lights red when the input level reaches 3dB below clipping. If the PEAK indictor frequently lights, adjust the volume of the input source so that the PEAK indictor flashes briefly on the highest input levels.  LEVEL control Adjusts the overall output level. Set the MIC/LINE switch () of the DSR112, DSR115 and DSR215 to LINE when connecting a device (such as a mixer) whose specified output level is +4dBu. In this condition, set the LEVEL control to roughly a 12:00 position to obtain sufficient output.  MIC/LINE switch (DSR112/DSR115/DSR215) Set this switch to MIC or LINE for INPUT jacks, depending on the level of the input signal. For low-level signals (such as microphones), set the switch to the MIC (0) position. For highlevel signals (such as electronic musical instruments and audio equipment), set the switch to the LINE (/) position.  POLARITY switch (DSR118W) Selects the subwoofer polarity. You will usually set this switch to NORMAL (/). However, an INVERTED (0) setting may improve low-range response, depending on the type and location of the speaker system. Try both settings and select the one that produces the best low-end sound.  LIMIT indicator Lights when the output limiter is active. The output limiter will operate in the following situations, attenuating the output signals to the amplifier. • If the output voltage of the amplifier has exceeded the maximum value • If excessive integral power consumption is detected • If the amplifier overheats NOTE • The integral power consumption refers to the sum of power con- sumption provided to the speaker driver per unit time. • (DSR112/DSR115/DSR215) If the output voltage of the amplifier has exceeded the maximum value, or if excessive integral power consumption is detected, the LIMIT indicator will light when the amount of attenuation is 3dB or higher.  PROTECTION indicator Lights when the protection system is active. The protection system will operate in the following situations. NOTE If the protection system has engaged after the problem was detected, waiting until the amplifier cools down or powering off and on again will return to normal operation. If the unit does not return to normal operation, please contact your Yamaha dealer. • If amplifier overheating is detected: The speaker output will be muted. • If DC output is detected: After the indicator lights, the speaker output will be muted, and the power supply section will be shut down. • If overcurrent is detected: The speaker output will be muted. • When turning the power on: Lights for about two seconds when the power supply starts. The indicator turns off when the power supply has started normally. • When turning the power off: If the power switch is set to off, or if the power turns off by an unexpected error, the protection system will shut the device down to prevent noise. DSR112/DSR115/DSR215/DSR118W Owner's Manual 7