Detail 01
2.1mm jack, barrel negative / tip positive, red
Reversed from the Boss-style standard. Check your pedal's marking before plugging in or you can damage it.
Product detailSKU #1273888005421
Carl MartinPowerjack 9V DC Power Supply
1/4
Independent shopping perspective
The Korena take
9V DC power supply for pedals, with four output connector types. For players replacing batteries or a lost adapter on a small board.
Strong match
Who this is for
- Powering a single pedal without hunting down the right adapter
- Replacing a missing power supply on an older effect
- Feeding a pedal that takes an unusual jack size
Consider the trade-offs
When to look elsewhere
- Powering a full board — this is not an isolated multi-output brick
- Pedals requiring 12V or 18V
- Players who need isolated outputs to kill ground hum
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
2.5mm jack, barrel positive / tip negative, grey
The larger barrel used by some vintage and boutique pedals. Opposite polarity from the red 2.1mm lead.
Detail 03
Battery clip output
Feeds pedals that have no DC jack at all, through the 9V battery snap inside the enclosure.
Detail 04
1/8-inch jack, tip positive
Covers older effects that used a mini-plug for power instead of a barrel connector.
Detail 05
Four connector types on one supply
One adapter covers a mixed collection of pedals from different eras and brands.
Final check
Know before you order
- 01Color-coded leads differ in polarity — match the marking on your pedal exactly
- 02One supply, not a daisy chain — check whether a splitter is included
- 03Confirm the mains plug matches your country's outlets
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this power my whole pedalboard?
It is a single supply, not an isolated multi-output unit. For a full board with digital and analog pedals side by side, use a dedicated power brick.
02Is it center negative like a Boss adapter?
The red 2.1mm lead is barrel negative, tip positive. The grey 2.5mm lead is the reverse. Check your pedal's polarity symbol before connecting.
03Can I use it on a pedal with no power jack?
Yes, through the battery clip lead, which connects to the 9V snap inside the pedal.
04Will it work with 18V pedals?
No. This is a 9V DC supply. Pedals that require 18V need their own higher-voltage adapter.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
3 detailsConnections & power
- 2 1mm Jack
- Barrel Nagative (-), Tip Positive (+), (RED)
- 1 8 Inch Jack
- Tip positive (+), Sleave negative (-), Positive (+)
- 2 5mm Jack
- Barrel Positive (+), Tip Negative (-), (GREY)
1 detailsIn the box
- Battery Clip
- Negative (-)
