User manual YAMAHA AD808

[. . . ] You can easily adjust the gain for each channel (in 1dB steps) and set up the high pass filter from the front panel. These settings are stored in the unit's backup memory, and are retained even after the power is turned off. In addition, a special protocol enables you to remotely control the unit from a connected computer or other device. Please read this manual thoroughly before using the unit to take the greatest advantage of the AD808's extensive features for the longest period of time. [. . . ] 9 Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The gain and high pass filter settings are stored even after you turn off the power to the unit. NOTE: To avoid loud noise from the speakers, turn on the power first to the connected devices that are closest to the sound source. Example: Sound source AD808 Mixer Power amplifier To turn off the power to the system, reverse the order described above. 5 Part Names and Functions Rear Panel 3 4 12 A Grounding screw 5 6 7 8 9 D [PC RS422] switch If you connect a computer to [HA REMOTE] connector 1, set this switch to PC. If you connect a Yamaha PM5D or DM2000, or an additional AD808 in a multiple AD808 system, to [HA REMOTE] connector 1, set this switch to RS422. For safety, use this screw to ground the AD808. The included power cable has a three-pin plug. If the AC outlet is grounded, the AD808 will be grounded correctly via the power cable. If the AC outlet does not provide a suitable ground, this screw must be connected to a suitable ground point. Grounding is also an effective method for eliminating hum, interference, and other noise. E [HA REMOTE] connector 2 In a multiple AD808 system, connect one AD808 to this D-sub 9-pin connector on another AD808. B [AC IN] connector Connect the included power cable here. First, connect the power cable to the AD808, then insert the power cable plug into the AC outlet. Be sure to use the included power cable. Use of other cables may result in malfunction, heat generation, or fire. F [DIGITAL OUT A/B] connector These D-sub 25-pin connectors output AES/EBU format digital audio. When the [+48V MASTER] switch is turned off, the phantom power is not supplied to channels even if the [+48V] button is turned on for the channels. Adjusting the Gain Trim (Gain Correction) Follow the steps below to correct the channel gain in 0. 1dB steps. The output level of each channel has been calibrated in the factory. Typically, you will not have to correct the setting. NOTE: In the factory, the level has been set to the optimum value and the initial level varies with each channel. This setting is reset to the factory value when you initialize the backup memory. 1 Press the Channel Select buttons to select the channels. The selected channels' Channel Select button indicators light up. The channel +48V indicator lights up when the +48V phantom power for the selected channels is turned on. If phantom power for the selected channels was off before the operation, the [+48V] button indicator starts flashing rapidly. If phantom power for the selected channels was on before the operation, the [+48V] button indicator and the phantom power for the selected channels turns off. 2 1 Press and hold down the desired Channel Select button for more than two seconds. The Channel Select button indicator flashes and the Gain display indicates the gain trim value. 7 Basic Operations 2 3 Rotate the Gain control to adjust the gain trim value. You can adjust the gain trim value in the range of ­1. 5dB through +1. 5dB in 0. 1dB steps. [. . . ] reserves the right to change or modify products or specifications at any time without prior notice. Since specifications, equipment or options may not be the same in every locale, please check with your Yamaha dealer. European models Purchaser/User Information specified in EN55103-1 and EN55103-2. Inrush Current: 35 A Conforms to Environments: E1, E2, E3 and E4 15 For details of products, please contact your nearest Yamaha representative or the authorized distributor listed below. [. . . ]