Yamaha A-U671 Owner's Manual
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I ntegrated Am pl if ier
O W NE R 'S MANUAL
AB

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Summary of Contents for Yamaha A-U671

  • Page 1 I ntegrated Am pl if ier O W NE R ’S MANUAL...
  • Page 2 • Do not use different types of batteries (such as alkaline and manganese batteries) together. Specification 14 Do not attempt to modify or fix this unit. Contact qualified Yamaha service personnel when any service of batteries may be different even though they look the same. Danger of explosion may happen if is needed.
  • Page 3 This symbol might be used in combination with a chemical symbol. In this case it complies with the requirement set by the Directive for the chemical involved. We, Yamaha Music Europe GmbH hereby declare that this unit is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.
  • Page 4: Table Of Contents

    INTRODUCTION CONTENTS INTRODUCTION INTRODUCTION ..............2 What the unit can do What the unit can do ..................2 Supplied accessories..................2 ◆ The unit is an integrated amplifier that plays back analog stereo signals with high NAMES AND FUNCTIONS OF THE PARTS ........3 quality sound.
  • Page 5: Names And Functions Of The Parts

    NAMES AND FUNCTIONS OF THE PARTS NAMES AND FUNCTIONS OF THE PARTS Front panel A (Power) button BASS control Turns this unit on, or sets it to standby mode. Increases or decreases the low frequency response. Control range: –10 dB to +10 dB Notes TREBLE control In standby mode, the unit consumes a small amount of power.
  • Page 6 NAMES AND FUNCTIONS OF THE PARTS USB DAC indicators Lights up when audio signals are input to the USB jack of this unit (☞page 12). PURE DIRECT indicator Lights up when the PURE DIRECT function is turned on (☞page 13). INPUT button and indicator Each time you press the button, the input source switches to LINE or USB.
  • Page 7: Rear Panel

    NAMES AND FUNCTIONS OF THE PARTS Rear panel USB (Type B) jack SPEAKERS terminals Used to connect a PC (☞page 8). Used to connect speakers (☞page 8). LINE IN jacks Power cable Used to connect an external component (☞page 8). SUBWOOFER jack Used to connect a subwoofer with built-in amplifier (☞page 8).
  • Page 8: Remote Control

    NAMES AND FUNCTIONS OF THE PARTS Remote control Infrared signal transmitter Sends infrared signals. A (Power) Turns this unit on, or sets it to standby mode. PURE DIRECT ☞ Reproduces any input source in the purest sound possible ( page 13). Input selector buttons Selects the input source (LINE or USB) you want to listen to.
  • Page 9: Installing Batteries

    NAMES AND FUNCTIONS OF THE PARTS ■ Installing batteries ■ Operation range Point the remote control at the remote control sensor on this unit and remain within the operating range shown below. Approximately (20 ft) AA, R6, UM-3 batteries Remote control Notes •...
  • Page 10: Connections

    CONNECTIONS CONNECTIONS Make sure to connect L (left) to L, R (right) to R, “+” to “+” and “–” to “–.” If the connections are faulty, no sound may be heard from the speakers, and if the polarity of the speaker connections is incorrect, the sound may be unnatural and lack bass.
  • Page 11: Connecting A Subwoofer

    CONNECTIONS ■ Connecting speaker cables Connecting a subwoofer 1 Remove approximately 10 mm (3/8”) of insulation from the end of each speaker cable. To use a subwoofer, connect the jack of the subwoofer to the SUBWOOFER jack of the 2 Twist the bare wires of the cable firmly together. unit as shown in the figure.
  • Page 12: Playback

    PLAYBACK PLAYBACK Playing a source Rotate the VOLUME control on the front panel fully counter-clockwise so as not to play sounds loud suddenly. VOLUME Press the (power) button on the front panel (or press (power) button on the remote control) to turn on the unit. Press the INPUT button on the front panel (or press the input selector buttons on the remote control) to select LINE or USB.
  • Page 13: Playing Back Music Stored On A Pc (Usb Dac Function)

    • Operations may not be executed correctly if the PC is connected to this unit before the driver is installed. • The “Yamaha HiFi USB Driver” is subject to change without prior notice. For details and the latest information, refer to the download page for the driver.
  • Page 14 Press the INPUT button on the front panel (or press USB on the remote control) to select USB. Set the audio output destination of the PC to “Yamaha A-U670/A-U671.” With Windows OS: Control Panel -> Hardware and Sound -> Sound -> [Playback] tab...
  • Page 15: Adjusting To The Desired Sound

    ADJUSTING TO THE DESIRED SOUND ADJUSTING TO THE DESIRED SOUND PURE DIRECT INPUT indicator PURE DIRECT ■ Reproducing pure, high fidelity sound (PURE DIRECT) With the PURE DIRECT function on, the BASS, TREBLE, and BALANCE circuits are bypassed to reduce noises. Therefore, in all input sources, you can enjoy music playback in straight and high quality sound.
  • Page 16: Troubleshooting

    Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or if the instructions below do not help, turn off this unit, disconnect the power cable, and then contact the nearest authorized Yamaha dealer or service center.
  • Page 17 TROUBLESHOOTING Problem Cause Solution See page Headphones are connected. Disconnect headphones when you use the speakers or subwoofer. No sound. (When headphones are connected, no sound comes from the speakers or subwoofer.) Sound is muted. Turn off the mute. Incorrect cable connections. Connect the stereo cable for audio units and the speaker wires properly.
  • Page 18 The dedicated “Yamaha HiFi USB Driver” has not been installed Install the “Yamaha HiFi USB Driver” again by following the correct correctly. procedure. The audio output destination of the computer is not set to “Yamaha Set the audio output destination of the computer to “Yamaha A-U670/A- A-U670/A-U671.” U671.”...
  • Page 19: Specifications

    SPECIFICATIONS SPECIFICATIONS AUDIO SECTION GENERAL • Power supply .......... AC 220 to 240 V, 50/60 Hz ■ LINE IN • Power consumption ..............30 W • Input jack ................RCA jack • Standby power consumption ............ 0.5 W ■ USB • Dimensions (W × H × D) ......314 ×...
  • Page 20 For detailed guarantee information about this Yamaha product, and Pan-EEA* and Switzerland warranty service, please either visit the website address below (Printable file is available at our website) or contact the Yamaha representative office for your country. * EEA: European Economic Area http://europe.yamaha.com/warranty/...

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