Suede·Social
Power supplies·2026 · OCT
Shared ground1700mA DC9V

01Truetone · jack-by-jack math

How many pedals can the Truetone 1 SPOT power?

One 1700mA 9V output, split across the board with a daisy-chain cable. Here is what that budget carries.

Plan a board on the Truetone 1 SPOT

02The short answer

As many pedals as the daisy-chain cable has plugs, all sharing one 1700mA 9V output and one ground. The example board below draws 293mA, 17% of that budget.

Built for: A small board of low-draw analog pedals at 9V, where one shared budget is enough and no digital pedal is around to bring hum.

  • 196 of the 205 powered pedals in our database fit its 1700mA 9V budget on their own.
  • 5 run at 18V, which it does not offer.
  • 72 pedals in our database are digital (most delays, reverbs, pitch and loopers) or draw over 100mA. On one shared ground those are the pedals that bring hum, so they want an isolated supply.
  • 4 pedals have no published draw: read the figure off the label and the calculator finds the jack that carries it.
  • 4 passive volume pedals take no jack at all.
  • The Eventide H90 Harmonizer runs from its own 12V adapter, off the supply.
  • The Electro-Harmonix Deluxe Memory Man runs from its own 24V adapter, off the supply.

03The jacks

Per-jack ratings as the manufacturer publishes them. A jack carries a pedal when it offers the pedal's voltage and its rating at that voltage is at or above the pedal's draw.

OutputJacksVoltagemA per jackPedals each jack carries
Jack 119V1700mA196 of 201
Total DC11700mA

Every pedal on the chain shares one ground. It carries a few low-draw analog pedals well; digital pedals want isolated outputs. “Pedals each jack carries” counts the 201 powered pedals in our database with a published draw, each at its own voltage. Pedal figures are typical published draws; check each pedal’s label for its voltage and polarity before you plug in.

04What it cannot run

The pedals in our database this supply cannot run, highest draw first.

Not on this supply · 5

Run these from a supply with a 18V jack. Compare supplies.

05A real board on it

The calculator's example board (a tuner, a compressor, an overdrive, a distortion, a delay and a reverb), run on this supply.

Runs, with a catch

Draw
293mA
Available
1700mA
Headroom
1407mA
Outputs
6 pedals on 1 daisy-chain output
  • Boss DD-8 Digital Delay and Boss RV-6 Reverb share a ground with the rest of the board on this supply. Digital pedals (most delays, reverbs, pitch and loopers) and pedals over 100mA want their own isolated jack, and on a shared ground they are the usual source of hum. 2 isolated outputs should remove it.

Open it in the calculator

Source

Per-jack ratings transcribed from Truetone’s published spec. A single 9V jack rated 1700mA, split out with a daisy-chain cable. Every pedal on the chain shares one ground, which is where daisy-chain hum comes from. Truetone spec page.

Checked against that page on October 15, 2026.

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