User manual YAMAHA PC9500N PC4800N

[. . . ] POWER AMPLIFIER Owner's Manual E FCC INFORMATION (U. S. A. ) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. [. . . ] This should be: 5 cm at the sides, 10 cm behind, and 10 cm above. For normal ventilation during use, remove the rear of the rack or open a ventilation hole. If the airflow is not adequate, the unit will heat up inside and may cause a fire. · To mount several of these units in an EIA-compliant rack, refer to the rack mounting instructions on page 10. Operation · Use only speaker cables when connecting speakers to amplifier outputs. Using other types of cables is a fire hazard. · Do not use this amplifier for any purpose other than driving loudspeakers. PRECAUTIONS FOR OPERATION Connector pin assignments · XLR-type connectors are wired as follows: pin 1: ground, pin 2: hot (+), and pin 3: cold (­). ­ FOR CORRECT OPERATION ­ Influence on cell phone usage · Using a cell phone (mobile telephone) near this unit may induce noise. If noise occurs, use the telephone away from the unit. 4 Introduction Thank you for purchasing a Yamaha PC9500N, or PC4800N Series Power Amplifier. The PC Series of power amplifiers was developed from Yamaha's wealth of experience in building PA equipment and its tradition of careful attention to every detail of circuit design. These power amplifiers feature high power and superb quality together with superior reliability and stability, guaranteeing the highest possible audio performance. Main features include · Three modes are provided to support a broad range of applications: STEREO mode which can be driven by two independent sources, PARALLEL mode in which a monaural source drives both channels, and BRIDGE mode in which the two internal amps function as a single mono amp. · Balanced XLR connector and Euroblock connector inputs, and Speakon connector and fiveway binding post outputs are provided. · A high pass filter switch that cuts frequencies below 40 Hz, and detented attenuators and level meters for channels A and B are provided. · Metering and indicators include easily visible two-channel level meters, a PROTECTION indicator that shows the state of various protection systems (power on/off detection, output protection, DC detection), a TEMP indicator that indicates heat sink overheating, and a REMOTE indicator that indicates the external remote status. · Variable-speed, low-noise cooling fan system ensures high reliability even under the most demanding conditions. This Owner's Manual applies to the PC9500N and PC4800N power amplifier. In order to take full advantage of your power amplifier and enjoy long and trouble-free operation, please read this Owner's Manual carefully before using your Power Amplifier. Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Speaker connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Using a Euroblock connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In particular, when mounting in a rack whose back can not be left open, mount according to the following instructions. Rack: Leave a gap of 10 cm or more between the rear panel of the rack and the rear panel of the amplifier. Fan: Use a fan with 1. 5 m3/min or more maximum wind and 5 mmH2O or more maximum static pressure. Mounting: Install the fan kit on the top slot or the top panel of the rack and install a blanking panel between two amps. [. . . ]