User manual RANE DA 216S

[. . . ] When using microphones that require a "phantom" voltage, turn on the PHANTOM POWER switch, illuminating its rear panel LED. Because the phantom voltage is applied to both Inputs, don't mix phantom powered and non-phantom powered mics in the same DA 216S. Never engage the phantom voltage when using an unbalanced mic--doing so may damage the mic. If the mic is too "hot", press the INPUT GAIN switch in to reduce the gain by 20 dB. [. . . ] 4 INPUT GAIN switches: Changes the gain by 20 dB. That is, with mic Input, the INPUT GAIN switch sets the gain to 60 dB (out) or 40 dB (in). With a line-level Input, it sets the gain to 20 dB (out) or 0 dB (in). 5 PHANTOM POWER switch: When activated (in), 15 VDC Phantom Power appears at each mic-level Input and the LED illuminates. If an Input is selected for line-level, the Phantom Voltage is disabled for that channel, even when the PHANTOM LED is lit. 6 Power connector: The internal universal switching power supply operates on any AC mains 100 to 240 VAC, 50 or 60 Hz (most places in the world). All that is required when traveling is the appropriate IEC line cord. Manual-3 DA 216S Connection When connecting the DA 216S to other components in your system, leave the power supply for last. This gives you a chance to make mistakes and correct them without announcing what you did to the whole world and without damaging "downstream" equipment. Remember this when setting INPUT PAD, INPUT GAIN and PHANTOM POWER switches. These switches should never be changed in a live system. Suddenly changing the gain by 40 dB can have a profound impact on the ears of the listening audience. INPUTS The two Inputs on the DA 216S are balanced. They may also be used in an unbalanced configuration. However, if used unbalanced, do not engage Phantom Power. This cable should always be two conductors plus shield, even for unbalanced operation. If you must use shielded single conductor, keep the cable as short as possible (under 10 feet [3 meters]) to avoid hum or radio pick up. When connecting Inputs, use all three Input terminals. For unbalanced, the "hot" Input goes to the "+", and the common wire goes to the "­" while the shield connects the ground. Since the common wire and shield are to be tied together at one end in an unbalanced system, this connects the "­" Input to chassis ground. In a balanced system (highly preferred), the "+" Input connects to the "+" Output of the previous equipment. The "­" Input then connects to the "­" Output and the shield goes to the chassis ground. These Input connections may be reversed if it is necessary to reverse the polarity of the Input signal. [. . . ] The user may still want to turn down the OUTPUT LEVEL to avoid overloading downstream equipment. LINE-LEVEL In the LINE-level configuration, start with unity gain. Set INPUT PAD switch to LINE position (in). Set appropriate INPUT GAIN switch to 0 dB. [. . . ]