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POWER AMPLIFIER
XM6150
XM4220
Owner’s Manual
E
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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. Main features include • Six amplifiers (four on the 4220) that can
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Precautions Warnings Cautions • Do not allow water to enter this unit or allow the unit to • When rack-mounting the unit, allow enough free space become wet. Fire or electrical shock may result. around the unit for normal ventilation. This should be: 10 cm at the sides, 30 cm behind, and 20 cm above. • Connect this unit’s power cord only to an AC outlet of the For normal ventilation during use, remove the rear of the type stated in this Owner’s Manual or as marked on the unit. rack or open a ven
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Controls and Functions n Front Panel 1 3 4 2 * The illustration shows model XM6150. 1 POWER switch and indicator 3 CLIP indicator This is the main POWER switch. Press to turn on the A channel’s CLIP indicator lights up when its output amplifier. Press it again to turn off. The POWER distortion exceeds 1% (i.e., clipping). Output signal indicator lights up when the amplifier it turned on. clipping is typically caused by excessive input signal levels. 2 PROTECTION indicator When the protection sys
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n Rear Panel 13 2 5 6 8 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 These balanced Euroblock connectors are used to (High Pass Filter) for each channel. When set to ON, connect input signals. frequencies below 80 Hz are filtered using a 12 dB/ In Bridge mode, only the Euroblock connector of the octave high pass filter. first channel in the pair is active, i.e., channel A of pair Turn this switch ON if 70V-
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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 Speaker Speaker min. 4Ω min. 4Ω min. 8Ω In Bridge mode, you can connect multiple high- impedan
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Connection n Using a Euroblock connector n Speaker Connection 1. If the wire insertion ports are closed, turn the screws 1. Turn off the POWER switch. on top of the connector counterclockwise to open the 2. Remove the cover attachment screws and remove the ports. protective cover from the speaker terminals. 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 E
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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. In particular, when mounting in a rack whose back can not be left open, mount accordi
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Specifications n General Specifications XM6150 XM4220 Power Output Level (Rated Power) 8W 100 W x 6 140 W x 4 20 Hz~20 kHz 4W 120 W x 6 180 W x 4 THD+N= 0.2% 8W /BRIDGE 240 W x 3 360 W x 2 1 kHz 8W 120 W x 6 170 W x 4 THD+N= 0.2% 4W 150 W x 6 220 W x 4 8W /BRIDGE 300 W x 3 440 W x 2 70.7V/BRIDGE 150 W x 3 350 W x 2 Power Bandwidth Half Power 10 Hz~40 kHz (THD+N= 1%) Total Harmonic Distortion (THD + N) £ 0.2% 20 Hz~20 kHz, Half Power Frequency Response 8W , Po= 1 W 0 dB, 0.5 dB, –1 dB 20 Hz~5
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n Block Diagram 10 Note: The block diagram indicated in the dotted frame ( ) applies only to model XM6150
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n Dimensions W: 480 Unit: mm 11 H: 132 D: 319
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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 Remedy Protection Circuit There is a short at the amplifier’s speaker Locate and remove outputs, the speaker’s the short. inputs, or in the wiring. The PC limiter circuit CLIP indicator lights up activates to protect Use a speaker with a the power transistors. The impedance of the minimum im
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YAMAHA CORPORATION V455890 R0 1 AP 16 Pro Audio Division, #18/3 P.O. Box 3, Hamamatsu, 430-8651, Japan NP Printed in Taiwan
