YAMAHA logoAcoustic-Electric Guitar
Owner’s Manual

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.

Warning icon WARNING
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 occurs, 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 the use of the instrument.

Warning icon CAUTION
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.
• Do 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.

* Yamaha cannot be held responsible for damage caused by improper use or modifications to the instrument, or data that is lost or destroyed.
* Information on the battery can be found in the section at the end of this sheet.
* Please read the instruction manual for the external audio device such as a guitar amplifier, etc., prior to use.


As battery power becomes low, the battery check indicator will light. Replace the batteries as soon as possible.

  • Press the release lever on the battery case in the direction indicated by the arrow↓ in the illustration in order to unlock it, and then slide out the battery holder.
  • Remove the old batteries from the battery holder and insert the two new size AA alkaline batteries. Make sure that the poles on the batteries are properly positioned as shown in the diagram inside of the holder.
  • Slide the battery holder back into the battery case and press firmly so that the battery holder locks in place.
    YAMAHA System65 Acoustic Electric -BATTERY REPLACEMENT


YAMAHA System65 Acoustic Electric -NOMENCLATURE

The built-in preamplifier is automatically turned ON when a guitar cable is connected to the output jack. The tuner can be turned on or off anytime.

  1. VOL Control
    Controls the volume. Turning the knob fully counterclockwise sets the volume to zero.
    * Always set the volume to zero when connecting or disconnecting the cable.
  2. BATT. (Battery Check) Indicator
    This indicator will light when the battery needs to be replaced. Please replace the battery as soon as possible when the BATT. indicator lights.
    * The battery check indicator may light momentarily when the TUNER switch is pressed. This is not a sign, however, that the battery power is low.
  3. Band Equalizer
    The knob positions in the figure show the flat-level setting. Turn clockwise to boost, or counterclockwise to cut.
    LOW: Boosts or cuts the level of the low frequencies.
    MID: Boosts or cuts the level of the middle frequencies. The AMF control r adjusts the center frequency of the band affected by this control.
    HIGH: Boosts or cuts the level of the high frequencies.
  4. AMF (Adjustable Mid Frequency) Control
    Sets the center frequency of the band of frequencies affected by the MID equalizer
    control. The range is from 80 Hz to 10 kHz.
  5. Tuner Display
    Displays tuner information.
  6. TUNER Switch
    Switches the tuner ON/OFF.


  1. Press and hold the TUNER switch until the display lights to switch the tuner power ON.
  2. Tune the guitar string until the note name of the desired pitch appears in the display.
  3. The string is in tune when only the lamp lights in the center of the display.
    Pitch is low →→→In Tune←←←Pitch is high
    YAMAHA System65 Acoustic Electric -lamp lights
  4. Press the TUNER switch again to switch the tuner power OFF. Also, if the note name is not
    shown in the display for more than 1 minute, the power will automatically switch OFF. ( display display goes off)
    * It may take a few seconds before the tuner can detect pitches after being switched ON.
    * The note name and displaydisplays may have difficulty keeping up with irregular pitch changes. Gradually change the pitch and check when tuning.
    * The tuner may not be able to detect notes rich with overtones or with very short sustain.
    * Sound output is not muted when the tuner is being used.


  • System: System65
  • Pickup: Bar Sensor (Piezo type)
  • Preamplifier Controls: Vol., 3-Band EQ (HIGH, MID, LOW), AMF control, TUNER
  • Output Jack: Combination endpin/power switch
  • Output Impedance: 1kΩ
  •  Batteries: Size AA alkaline battery (LR6) x2
  • Battery Life: Approx. 180 hours (Without tuner and using alkaline batteries. May differ
    due to operating conditions.)
  • Tuner: Chromatic type (12 semi-tones), A4=440Hz, Accuracy range +/– 3 cents
  • Accessories: Neck adjustment hex-wrench x 1
    * 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.


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. Failure to follow instructions could void your FCC authorization to use this product in the USA.
3. 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 users 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.

Manual Development Group
Yamaha Corporation
Published 05/2021

Documents / Resources

YAMAHA System65 Acoustic Electric Guitar [pdf] Owner's Manual
Acoustic Electric Guitar, System65

Leave a comment

Your email address will not be published. Required fields are marked *