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Harley Benton PowerPlant Tuner


Tuner Pedal with integrated power supply for additional pedals

  • Chromatic floor tuner with integrated multi-power supply
  • Suitable for guitars and basses
  • Dimensions including switch and sockets (W x H x D): 70 x 55 x 122 mm
  • Weight (without power adapter): 300 g
  • Includes stabilized DC power supply (AC 100-240 V), 8 DC cables and 2 cables for reversing the polarity


  • Large LED/LCD display
  • True bypass
  • Vocal range: 12 - 4186 Hz
  • Accuracy: ± 1 cent

Power adapter:

  • 6 Outputs 9 V DC 100 mA
  • 2 Outputs 9 V DC 500 mA
  • Total output: 1600 mA
  • Isolated sections
  • Center negative
  • Short circuit and over-voltage protection
DC/AC current DC
Output current in mA 1600 mA
9 V Yes
12 V No
18 V No
Secondary voltage No
Multi-output power supply Yes
Item number 372334
Including VAT; Excluding £8 shipping
Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
49 Sales Rank

214 Customer Reviews

5 103 Customers
4 58 Customers
3 31 Customers
2 14 Customers
1 8 Customers
4.1 / 5


Does what it's supposed to, but comes with VERY noisy adaptor
VeryShortNickName 20.08.2021
The pedal works great. It's very easy to see the display, so far I connected 3 other pedals on the 100mA (a Wah, a mini TS, and a Mooer Black Secret) and it does not generate hum or added noise.
Next pedal will be a Whammy DT and I will update the review after testing it.

Major downside, and the reason I cannot give it 5 stars is that it came with a VERY noisy adaptor. The power source injected a siren like noise which made playing unbearable.
Thomann sent me a replacement, but unfortunately the replacement had the same issue. It got solved it after buying a "Truetone 1 spot" at a local shop. No more hum, but cost me 20€ more.


Solid construction, mixed performance
ISBM 10.10.2017
I have this tuner pedal in my stage rig which covers my role as a bass player in one band and guitar in another. I did have issues with it at first but have now found a set up that works.

There is noise; by the bus load. This occurs when certain distortion pedals are in the signal chain. Not a problem I have had with any other pedals so I assume that this one is to blame - So why do I still use it? Well I like the look of the display and the fact that it distributes power saving space. My bass rig (in Drop D) has always been fine and I note the comments in other reviews about not registering correctly - never had it myself. Even when using a 5 string bass with a low B it registers.

For guitar I have had to compromise but again, once I found what worked the pedal consistently performed.

So what should you make of it?
If you are willing to persist with it then you have a very well made tuner with a great display. If you want to unbox, plug in and use then perhaps you should find something else. I will be keeping mine and will continue to play about with pedals until I work out what is causing all that noise!


Very good Choice
Anonymous 13.06.2016
So, you have set up all your favorite pedals, connections, little cables going round and round your pedal-train and now it is time to make an important decision: External power supply, one spot or power plant?

Having already tried the powerplant products (both) I have to say that their quality is very good. When i was browsing the Thomann site i came across the Powerplant Tuner.

It seemed to me the obvious choice since it combines both a tuner (which by the way is THE most important pedal for me) and a power supply for lots of pedals.

In a few words: It is sturdy, good-looking, and most important of all. It is NOISEless! You won't be bothered with any noises at all.

Feel free to tune with its bright but not disturbing lcd screen.



Got noise!
kjarrime 11.08.2017
if i connect my 3 pedals i get noise.
if i use the tuner as to only power my other 2 pedals i get no noise. But if using all 3 it?s noise.
when using only the tuner is?t no noise.

It?s really frustrating.

Pros : Tuner works good as a tuner and got bright lights. looks well build and sturdy.

Cons : It?s got NOISE. it?s says it?s got isolated outputs. I think this is just a dasy cahin kind of power and no isolated outputs.
if that is true they are lying saying it is isolated.

Well i live in Iceland so it costs me to much to send it back to be worth it so i have to keep it and ends in a drawer somewhere at home

Im going to order a better power supply and another tuner later when i have the budget.

can?t recommend it. sorry :(


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