Boss TU-3 Chromatic Tuner - Secondhand

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Key Features

Very Good condition secondhand product. Fully functional, inspected by our experts
Compact always-on tuner
Always-on format saves space and suits switching systems
High Brightness mode improves screen visibility outdoors
Supports flat tunings for 7-string guitars and 6-string basses

Secondhand condition of this item: VERY GOOD

This product is secondhand and has been inspected by our team of product experts to ensure it is in full working order, and meets our high quality standards.

A product in very good condition shows minor signs of use and wear, such as small marks or light scratches that do not affect its performance. There are no significant dents or damage, and all parts function properly. The item remains well-maintained and structurally sound, with only slight cosmetic imperfections visible upon close inspection.

Any accessories or software mentioned outside of this condition report may not be included with this item for sale.

Included with this item: Battery, Original Packaging

Product Ref: 343503

Full Description

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Compact design for space-saving setups

The Boss TU-3S Chromatic Tuner is purpose-built for pedalboards where every inch counts. By eliminating the footswitch, it delivers the same trusted tuning performance as the TU-3 in a smaller, always-on format. This makes it perfect for compact rigs, fly boards, or setups that rely on loop switchers like the BOSS ES-8 and ES-5.

High visibility in any environment

With a bright 21-segment LED meter and a High Brightness mode, the TU-3S ensures excellent visibility on dark stages and in bright outdoor settings. This makes accurate tuning fast and easy, no matter where you're performing. The optional brightness boost is especially useful during outdoor gigs or festival sets.

Flexible tuning options

Designed to support a wide range of instruments, the TU-3S handles standard guitars, 7-strings, bass guitars, and drop tunings with ease. It includes Chromatic, Guitar, and Bass modes, plus flat tuning capabilities. Accu-Pitch Sign offers clear visual confirmation once tuning is complete, streamlining your setup process.

Power-efficient and pedal-ready

The TU-3S integrates seamlessly into powered pedalboards and requires a PSA-series adaptor for operation, as it cannot run on batteries. Its DC Out jack also allows you to power up to seven BOSS compact pedals with an optional daisy chain, helping you keep your rig efficient and organised.

Specifications

Product Name: Boss TU-3S Chromatic Tuner
Product Code: TU-3S
Tuning Range: C0 (16.35 Hz) – C8 (4,186 Hz)
Reference Pitch: A4 = 436–445 Hz (1 Hz steps)
Tuning Accuracy: ±1 cent
Tuning Modes: Chromatic, Chromatic Flat x2, Guitar, Guitar Flat x2, Bass, Bass Flat x3
Display Modes: Cent mode, Stream mode
Bypass: Buffered
Power Supply: PSA-series AC adaptor (sold separately)
Current Draw: 30 mA (normal), 85 mA (High Brightness mode)
Input Impedance: 1 MΩ
Output Impedance: 1 kΩ
Recommended Load Impedance: 10 kΩ or greater
Controls: MODE button, STREAM/CENT button
Indicator: CHECK indicator (power on)
Connectors: INPUT jack (1/4"), OUTPUT jack (1/4"), DC IN jack, DC OUT jack
Accessories Included: Parallel DC cord (DC Plug x2), rubber foot, leaflet
Optional Accessories: PSA-series AC adaptor, PCS-20A daisy-chain cable (DC Plug x8)
Dimensions (W x D x H): 73 x 84 x 56 mm / 2-7/8" x 3-5/16" x 2-1/4"
Weight: 220 g / 8 oz

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