BOSS TU-3W Chromatic Tuner

Specifications

• Tuning Range:
  • C0 (16.35 Hz) to C8 (4,186 Hz)
• Reference Pitch:
  • A4 = 436–445 Hz (1 Hz step)
• Tuning Accuracy:
  • +/- 1 cent
  • Ensures precise tuning.
• Modes:
  • Chromatic
  • Chromatic flat x2
  • Guitar
  • Guitar flat x2
  • Bass
  • Bass flat x3
• Display Modes:
  • Cent mode
  • Stream mode

Power Supply

• Battery Options:
  • Alkaline: 9V, 6LR61
  • Carbon-Zinc: 9V, 6F22
• AC Adaptor:
  • PSA series (sold separately)
• Current Draw:
  • 50 mA (DC 9V)
  • 110 mA (DC 9V, when High Brightness mode is on)
• Expected Battery Life (under continuous use):
  • Alkaline: Approx. 5.5 hours
  • Carbon: Approx. 0.5 hours

Bypass

• Buffered Bypass or True Bypass:
  • Allows you to choose between buffered or true bypass for the signal path.

Controls

• Pedal Switch:
  • Activates or deactivates the tuner.
• OUTPUT Switch (BUF/THRU SW):
  • Switches between buffered output or through signal.
• MODE Button:
  • Switches between different tuning modes.
• STREAM/CENT Button:
  • Switches between stream and cent display modes.

Indicators

• CHECK Indicator:
  • Serves as a battery check indicator.

Connectors

• INPUT Jack:
  • 1/4-inch phone type
  • For connecting your instrument (e.g., guitar, bass).
• OUTPUT Jack:
  • 1/4-inch phone type
  • For sending the signal to an amplifier or other device.
• BYPASS Jack:
  • 1/4-inch phone type
  • For bypassing the tuner when not in use.
• DC IN Jack:
  • For connecting to an external power supply.
• DC OUT Jack:
  • For powering other devices.

Accessories

• Included:
  • Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
  • Alkaline 9V battery (6LR61)
• Optional (sold separately):
  • AC Adaptor: PSA series
  • Parallel DC Cord: PCS-20A (DC Plug x8)

Size and Weight

• Width:
  • 73 mm (2-7/8 inches)
• Depth:
  • 129 mm (5-1/8 inches)
• Height:
  • 59 mm (2-3/8 inches)
• Weight (including battery):
  • 460 g (1 lb 1 oz)