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. 2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product MUST be used. Follow all installation instructions.
Precautions WARNING Installation • Connect this unit’s power cord only to an AC outlet of the type stated in this Owner’s Manual or as marked on the unit. Failure to do so is a fire and electrical shock hazard. • Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result. • Do not place a container with liquid or small metal objects on top of this unit. Liquid or metal objects inside this unit are a fire and electrical shock hazard.
CAUTION Installation • Keep this unit away from the following locations: - Locations exposed to oil splashes or steam, such as near cooking stoves, humidifiers, etc. - Unstable surfaces, such as a wobbly table or slope. 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.
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.
Controls and Functions ■ Front Panel 234 7 1 5 1 POWER/STAND-BY switch and indicator This turns the power of the amplifier on/off. When you press the switch to turn on the power, the indicator will light green. If the amplifier is connected to an external control unit and the amplifier has been commanded to enter STAND-BY mode, this indicator will light orange.
■ Rear Panel 1 2 3 5 6 4 8 7 1 XLR inputs 9 5 DATA ports These balanced XLR-3-31 type connectors are used to connect input signals. They are wired pin 1–ground, pin 2–hot (+), and pin 3–cold (–). An external control unit or interface box can be connected here to monitor or control the amplifier from the external device. 6 AMP ID switch Hot 1 2 Ground 3 Cold In Bridge mode, only the XLR input of the channel A is active.
■ Speaker connections Speakers can be connected to this amplifier in the following two ways. The speaker impedance will depend on the connection method and on the number of speakers that are connected. Refer to the following diagrams, and make sure that the speaker impedance is not less than the value prescribed for each type of connection. Connections in STEREO/PARALLEL modes Connections in BRIDGE mode or – + Speaker min. 4Ω + – Speaker min. 4Ω – + Speaker min.
Connection ■ Using a Euroblock connector 1. If the wire insertion ports are closed, turn the screws on top of the connector counterclockwise to open the ports. 2. Insert the wires into the appropriate ports, following the indication of the pole on the input terminal, turn the screws on top of the connector clockwise to fix the wires. 3. Attach the Euroblock connector to the input terminal on the unit. ■ Speaker Connection Five-way binding post 1. Turn off the POWER switch. 2.
Air Flow This unit uses a forced cooling system in which air comes in through the front opening and goes out the rear. Side View Rear View Front Air intake Air exhaust Rack Mounting If multiple high-power amp units are mounted in a rack with poor ventilation, the heat from the amps will cause the interior of the amp to become very hot, causing the performance of the amps to be impaired.
Specifications ■ General Specifications PC9500N PC4800N 120 V (US)/ 240 V (A) 230 V (EU) 120 V (US)/ 240 V (A) 230 V (EU) Power Output Level (Rated Power) 8Ω/STEREO 1 kHz 4Ω/STEREO THD+N= 1% 8Ω/BRIDGE 1000 W x 2 1600 W x 2 3200 W x 1 1050 W x 2 1650 W x 2 3300 W x 1 550 W x 2 850 W x 2 1700 W x 1 500 W x 2 800 W x 2 1600 W x 1 20 Hz–20 kHz THD+N= 0.
■ Block Diagram 12
46 4 380 456 26 ■ Dimensions 370 30 25 480 88 25 30 Unit: mm 13
Troubleshooting The following table lists the main causes of abnormal operation and the corrective measures required as well as the protective circuit operation in each case. Indicator Possible Cause CLIP indicator lights up PROTECTION indicator lights up Remedy There is a short at the amplifier’s speaker outputs, the speaker’s inputs, or in the wiring. Locate and remove the short. The impedance of the connected speaker is too low. Use a speaker with a minimum impedance of 4Ω (8Ω in Bridge mode).
YAMAHA CORPORATION V853450 R11 AP 16 NP Printed in Taiwan Pro Audio & Digital Musical Instrument Division P.O.