The BOSS TU-3S Chromatic Tuner provides the same function, accuracy, and display, as the TU-3—a go-to stompbox tuner for many electric guitarists. However, this model doesn’t sport a muting footswitch; it’s always on. This feature, in addition to its small size, renders it suitable for integration in any pedalboard or stompbox rig in which space-saving is paramount. It features tuning modes for six- and seven-string guitars, bass and six-string bass guitars, as well as flatted options for players who like to operate in lower frequencies.
Features
- Respected TU-3 tuning performance in a more compact size
- 21-segment LED meter with brightness control
- High Brightness mode for meter visibility outdoors
- Accu-Pitch Sign function provides visual verification when tuning is complete
- Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses
- Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch
- Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable
Specifications
| Tuning Modes | Chromatic, 2x chromatic flat, guitar, 2x guitar flat, bass, 3x bass flat |
| Tuning Accuracy | ±1 cent |
| Control | Mode button, stream/cent button |
| Bypass | Buffered bypass |
| Nominal Input Level | -20 dBu |
| Input Impedance | 1 MOhm |
| Nominal Output Level | -20 dBu |
| Output Impedance | 1 kOhm |
| Recommended Load Impedance | 10 kOhms or greater |
| Indicators | CHECK indicator (Power on indicator) |
| Display Mode | Cent mode, stream mode |
| Connectors | 1x 1/4″ INPUT jack 1x 1/4″ OUTPUT jack DC IN jack DC OUT jack |
| Power Supply | AC adapter (sold separately) |
| Current Draw | 35 mA (9 VDC) 95 mA (9 VDC, when High Brightness mode is on) |
| Dimensions | 2.9 x 3.9 x 2.3″ / 73 x 84 x 56 mm |
| Weight | 8 oz / 220 g |
Packaging Info
| Package Weight | 0.86 lb |
| Box Dimensions (LxWxH) | 6.05 x 3.85 x 2.75″ |
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