YAMAHA SYSTEM71 Electric Acoustic Guitar


Thank you for choosing a Yamaha electric-acoustic guitar. In order to make the most of the advanced features and performance provided by your guitar, please read this manual carefully before using the instrument. Note that this manual covers only the electronic parts of this product. For information on the other non-electronic parts, refer to the separate Acoustic Guitar Owner’s Manual.


Please keep this manual in a safe and handy place for future reference.

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:

Do not open

  • This instrument contains no user-serviceable parts. Do not open the instrument or attempt to disassemble or modify the internal components in any way. If it should appear to be malfunctioning, discontinue use immediately and have it inspected by qualified Yamaha service personnel.

Water warning

  • Do not expose the instrument to rain, use it near water or in damp or wet conditions, place it on any containers (such as vases, bottles, or glasses) containing liquids that might spill into any openings. If any liquid such as water seeps into the instrument, turn off the power immediately and have the instrument inspected by qualified Yamaha service personnel.

If you notice any abnormality

  • When one of the following problems occur, immediately turn off the power and remove all batteries from the instrument, then have the instrument inspected by Yamaha service personnel.
  • It emits unusual smells or smoke.
  • Some object has been dropped into the instrument.
  • There is a sudden loss of sound during use of the instrument.

Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others or damage to the instrument or other property. These precautions include, but are not limited to, the following:


  • Before connecting the instrument to other electronic components, turn off the power for all components. Before turning the power on or off for all components, set all volume levels to a minimum.
  • Be sure to set the volumes of all components at their minimum levels and gradually raise the volume controls while playing the instrument to set the desired listening level.


  • Do not place the instrument in an unstable position where it might accidentally fall over.

Handling caution

  • Do not rest your weight on, or place heavy objects on the instrument, and do not use excessive force on the buttons, switches or connectors.
  • not use the instrument/device or headphones for a long period of time at a high or uncomfortable volume level, since this can cause permanent hearing loss. If you experience any hearing loss or ringing in the ears, consult a physician.

Replacing the Batteries

  1. Slide the tab on the endpin section in the direction indicated by the arrow in the diagram below to release the lock, then pull out the battery holder.
  2. Insert two AA batteries making sure that the battery poles are properly aligned with the polarity markings on the battery holder.
  3. Slide the battery holder back into the endpin section until it locks.

When using nickel-metal-hydride batteries, take care not to damage the battery casing or poles when installing and removing the batteries.




The built-in preamplifier is automatically turned ON when a guitar cable is connected to the output jack. Always set the volume to its minimum level when connecting or disconnecting the cable.

  1. Volume Control
    Controls the volume.
  2. Status Display 3 Color LED
    Indicates status of the AFR function, SRT type, remaining battery power, etc
    Condition/Event Amber Green Red

    Power ON

    Flashes according to the

    Mic. type

    AFR Active Lit
    Depleted Battery Flashing
    SRT Mic. type 1 Single flash
    SRT Mic. type 2 Double flash
  3. 2-Band Equalizer (Bass, Treble)
    Level adjustments for the low frequency (Bass) and high frequency (Treble) ranges.
  4. Mic Type Switch (Mic. type 1/2)
    Selects the simulated mic type used in the SRT function. Each press of the switch (Blend knob) toggles between Mic. type 1: Condenser and Mic. type 2: Ribbon.
  5. Blend Control
    Controls the mix level of signals received from the pickup and the simulated mic. Rotate fully to the left for 100% pickup signal and fully to the right for 100% simulated mic signal.
  6. AFR (Auto Feedback Reduction) Switch
    If you experience problem feedback while performing, follow the AFR setting instructions below to effectively control the feedback.
    • When feedback occurs, press the AFR switch (Bass control knob) after all sound other than the feedback has been muted.
    • The system automatically detects the frequency causing the feedback and applies a –12dB cnotch filter.
    • The system may not be able to detect the problem frequency if two or more sounds are present at the same time.
    • Pressing this switch when the AFR system is active (w LED is lit green) switches the AFR function OFF. Alternatively, switch off the power (unplug cable from output jack) to cancel all notch filters
  7. Sound Hole Cover (included)
    Inserting the sound hole cover into the sound hole effectively reduces feedback.


  • System: System71
  • Pickup: Bar Sensor (Piezo type)
  • Preamplifier Controls: Volume, 2-Band EQ (Bass, Treble), Blend, Mic. type 1/2, AFR
  • Output Jack: Combination end pin/power switch
  • Output Impedance: 1kΩ
  • Batteries: AA battery x2 (alkaline or nickel-metal hydride)
  • Battery Life: Approx. 33 hours (4.5 hours after battery warning; when using alkaline batteries.) * May differ depending on operating conditions.
  • Accessories: Neck adjustment hex-wrench x1, Soundhole cover x1

For best performance, we recommend the use of alkaline or nickel-metal hydride batteries. When using nickel-metal hydride batteries, please follow the instructions in the manual provided with the batteries. The contents of this manual apply to the latest specifications as of the publishing date. To obtain the latest manual, access the Yamaha website then download the manual file.

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:


  • Follow the precautions below. Failure to do so might result in explosion, fire, overheating or battery fluid leakage.
    • Do not tamper with or disassemble batteries.
    • Do not dispose of batteries in fire.
    • Do not attempt to recharge batteries that are not designed to be charged.
    • Keep the batteries separate from metallic objects such as necklaces, hairpins, coins, and keys.
    • Use the specified battery type only.
    • Use new batteries, all of which are the same type, same model, and made by the same manufacturer.
    • Always make sure all batteries are inserted in conformity with the +/- polarity markings.
    • When the batteries run out, or if the instrument is not to be used for a long time, remove the batteries from the instrument.
  • Do not carry or store batteries with other metal objects such as necklaces, hairpins,
    metal coins, or keys.
  • If the batteries do leak, avoid contact with the leaked fluid. If the battery fluid should come in contact with your eyes, mouth, or skin, wash it immediately with water and consult a doctor. Battery fluid is corrosive and may possibly cause loss of sight or chemical burns.

Make sure to discard used batteries according to local regulations.


(the U.S.A.)

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.
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. Failure to follow instructions could void your FCC authorization to use this product in the USA.
NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the user’s manual, may cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and “ON”, please try to eliminate the problem by using one of the following measures:

  • Relocate either this product or the device that is being affected by the interference.
  • Utilize power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter/s.
  • In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300-ohm ribbon lead, change the lead-in to a co-axial type cable.
  • If these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service Division, 6600 Orangethorpe Ave, Buena Park, CA90620
  • The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.


  • This applies only to products distributed by Yamaha Canada Music Ltd.

Documents / Resources

YAMAHA SYSTEM71 Electric Acoustic Guitar [pdf] Instructions
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