POWER AMPLIFIER XM6150 XM4220 Owner’s Manual E
Introduction Thank you for purchasing a Yamaha 6150, or 4220 XM Series Power Amplifier. The XM 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.
Precautions Warnings Cautions • Do not allow water to enter this unit or allow the unit to become wet. Fire or electrical shock may result. • • 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 scratch, bend, twist, pull, or heat the power cord. A damaged power cord is a fire and electrical shock hazard.
Controls and Functions ■ Front Panel 1 3 4 2 * The illustration shows model XM6150. 1 POWER switch and indicator This is the main POWER switch. Press to turn on the amplifier. Press it again to turn off. The POWER indicator lights up when the amplifier it turned on. 2 PROTECTION indicator When the protection system is active, the PROTECTION indicator lights up and the speakers are automatically disconnected from the amplifier’s outputs.
■ Rear Panel 1 2 3 5 8 6 80 4 7 * The illustration shows model XM6150. 1 HPF switches 4 Euroblock connectors These switches are used to turn on and off the HPF (High Pass Filter) for each channel. When set to ON, frequencies below 80 Hz are filtered using a 12 dB/ octave high pass filter. Turn this switch ON if 70V-line, high-impedance speakers are connected. In Bridge mode, only the HPF switch of the first channel in the pair is active, i.e.
7 GND terminals This is the grounding screw terminal. If hum or noise occurs, ground (earth) the unit via this jack, or try connecting it to the chassis of the mixer or preamp, etc. 8 Speaker outputs These 5-way binding posts are used to connector speakers. The following illustrations show how speakers should be connected for normal and Bridge mode operation. Normal mode Bridge mode – + Speaker min. 4Ω + – + – Speaker min. 4Ω Speaker min.
Connection ■ Using a Euroblock connector ■ Speaker Connection 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. 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 sides and rear. Side View Rear View Front Air intake Air exhaust 80 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 XM6150 Power Output Level (Rated Power) 20 Hz~20 kHz THD+N= 0.2% 1 kHz THD+N= 0.2% Power Bandwidth 100 W x 6 120 W x 6 240 W x 3 140 W x 4 180 W x 4 360 W x 2 8Ω 4Ω 8Ω/BRIDGE 70.7V/BRIDGE 120 W x 6 150 W x 6 300 W x 3 150 W x 3 170 W x 4 220 W x 4 440 W x 2 350 W x 2 Half Power 10 Hz~40 kHz (THD+N= 1%) Total Harmonic Distortion (THD + N) 20 Hz~20 kHz, Half Power Frequency Response ≤0.2% 8Ω, Po= 1 W 0 dB, 0.
Note: The block diagram indicated in the dotted frame ( ) applies only to model XM6150 ■ Block Diagram 10
D: 319 ■ Dimensions H: 132 W: 480 Unit: mm 11
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 CLIP indicator lights up PROTECTION indicator lights up 12 Possible Cause Remedy Protection Circuit 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.
YAMAHA CORPORATION V455890 R0 1 AP 16 NP Printed in Taiwan Pro Audio Division, #18/3 P.O.
