Boss · Tuner
TU-3S Chromatic Tuner
9V · 85 mA · maker
Boss TU-3S Chromatic Tuner power requirements
9V DC · polarity not stated · draws 85mA
digital · from the maker
“Power Supply AC adaptor (sold separately) … DC IN jack DC OUT jack Current Draw 30 mA (DC 9 V) 85 mA (DC 9 V, when High Brightness mode is on)” source
Checked 2026-10-13
Size
73 × 84 × 56 mm (2.87 × 3.31 × 2.20 in)
Width × depth × height, from the manufacturer.
Power supplies that can run it
Each has an output that can power it, checked against its published figure. Plan the whole board to see what runs everything.
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- Voodoo Lab Pedal Power 3 Plus12 outputs · isolatedSweetwater
- Truetone 1 SPOT Pro CS1212 outputs · isolatedSweetwater
- MXR M238 ISO-Brick10 outputs · isolatedSweetwater
- Strymon Zuma9 outputs · isolatedSweetwater
- Voodoo Lab Pedal Power 38 outputs · isolatedSweetwater