seventy years logo
Join Thomann's Anniversary! We award your loyalty with special offers! Get your deals

Truetone 1 Spot 9V/DC


Switching Power Supply

  • Voltage: 9 V, 1700 mA
  • Automatically switches the international voltages (100 V / 240 V)
  • Connection cable: approx. 3 m
  • Plus outside, minus inside (2.1 mm / 5.5 mm)
Available since October 2010
Item number 115941
Sales Unit 1 piece(s)
DC/AC current DC
Output current in mA 1700 mA
9 V Yes
12 V No
18 V No
Secondary voltage No
Multi-output power supply No
Including VAT; Excluding £10 shipping
In stock
In stock

This product is in stock and can be shipped immediately.

Standard Delivery Times
Delivery approx. between Wednesday, 24.07. and Thursday, 25.07.

610 Customer ratings

4.7 / 5

You have to be logged in to rate products.

Note: To prevent ratings from being based on hearsay, smattering or surreptitious advertising we only allow ratings from real users on our website, who have bought the equipment from us.

After logging in you will also find all items you can rate under rate products in the customer centre.


314 Reviews

Not so happy!
cigilovic 17.11.2021
I bought this along with an ENGL Cabloader to use with my ENGL E570 preamp. E570's built-in speaker emulation is pretty outdated as you can imagine.
So Cabloader was definitely an excellent choice. However, a couple of days later, either Cabloader or this adapter stopped working. I wasn't able to troubleshoot the issue as I didn't have any spare adapters.

I had to return both items and Thomann sent me new ones immediately. (Thomann rocks!)

This time everything has worked so far, no problem. However, I noticed the adapter was generating a hissing, almost like a sine-wave sound when plugged in. This sound comes from the adapter itself, not from any sound source.

Also, there is a lot of noise generated when used within the system I mentioned.

I must say, I have fallen for the user reviews with high scores.

For this reason, I'm giving this item 3-stars. I wouldn't recommend this adapter personally.

I have already ordered a Voodoo Lab Pedal Power X4 instead and will definitely publish an article with proof of my claims about Trutone and do a comparison.

Once again, it's been proved that you should invest some decent amount of cash for these kinds of equipment.


A result!!
Capkeyed66 06.10.2018
For the past year and a half, I have been searching for an DC Plug for an old keyboard to use in the eu, ( I had been given not the correct one from original owner).

I had looked into transformers etc, but they were expensive for what I needed.

Searched on Thomann and found that they had The Truetone DC plug.(yay). It was The correct tip end and voltage. My search was over!!

The DC Plug works well. The length of the cable was more than enough for me; for some though, it may not be enough. It seems robust and well made. Time will tell. For now there are no problems.

If you have an old keyboard like I have with a 9 v + centre - polarity, this Truetone DC Plug, I can recommend highly. Job done!

As ever, Thomann delivery has been tops. Thank you Thomann!! I now have an old keyboard that I can use again.


The best of the best
Josip Jakopovic 23.02.2022
This is the best power supply on Earth.


Robust, space-saving, high-power supply with some minor noise issues
Han-earl 16.10.2021
High-power (1.7A) 9V switch-mode power-supply with a single Boss-polarity 2.1mm / 5.5mm barrel connector.

The two best feature of this product are its Europlug-style space saving design, and the robust cable (two 18AWG wires in a figure-8 cable). Those two things make it worth the price alone.

There are some minor noise issues (not hum; high-frequency) when powering pedals with inadequate power-supply filtering (soldering an extra capacitor or two might be an easy fix, but your milage may vary), and/or circuits designs prone to noise (e.g. transistor fuzz pedals).

I often use it with power-hungry devices like the FEA compressor, or certain half-rack units. Because of its high-power rating, it's surprisingly versatile, and a handy power-supply to have around in the studio; you never know when it might come in handy.