Harley Benton PowerPlant Junior

Power supply for effects devices

  • 5 Outputs with 9 V DC (with each 120 mA)
  • Galvanically isolated
  • Dimensions (W x Dx H): 116 x 77 x 38 mm
  • Incl. cable set (5x 60 cm / 5x 30 cm /1 x Y / 1x Daisy Chain, 100 cm)

Further Information

DC/AC current DC
Output current in mA 600 mA
9 V Yes
12 V No
18 V No
Secondary voltage No
Multi-output power supply Yes

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4492 Customer Ratings
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4.7 /5
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Total
quality
Extremely good for it's price
RL-Netherlands, 21.01.2021
I have used this for a few years. Never had any problems, never buzzing, never hissing. The size is quite nice.

The build-quality is really good. The power-chord does not feel cheap. The metal-casing makes it really durable and strong. Nice rubber-feet at the bottom. Enough wires included: 5 x 60 cm / 5x 30 cm / 1 x Y / 1x daisy chain. Really sturdy and a quality product.

If you want this product with the same quality, reliability and features, but a different brand.. I bet its not possible under 80-90 euro.

The PowerPlant Junior seems to be a copy of the T-Rex Fuel Tank Junior, so that could be an option. (available at thomann) from what i read, the other power-supplies under 85 euro have less quality and more problems. (Don't buy Mooer or palmer... )

Really, with this build-quality and for this money, no body should complain about anything, it's perfect for the money but i wanted to be honest about that annoyed me a tiny bit:

When using this on a small pedalboard, the only small downside to this power-supply is the placement of the power-chord input. Many more expensive power-supplies from other brands have this problem too. I want to make people aware of it; design your pedalboard first on paper (or in your head) and figure where you want the power-supply to be. (if you don't care about looks, durability and usage; then this is not a problem for you, i know many people don't care.. haha. i though, want to have everything look tight/nice and wired and placed in a really efficient way)

The power-chord placement be solved by turning the powerplant 180 degrees, but then the 9v outputs could be facing towards the 'audience'. This makes it harder to change 9v outputs and a it's tiny bit less appealing/attractive on your pedalboard. Another option is to have the power-chord input facing you, but with smaller pedalboards this could result in bending the power-chord too much, this could result in internal power-chord-wire damage. (you don't want that when preforming on a stage)

Right now i am using a really small pedalboard with a TrueTone-1-Spot adapter because this saves me room on my house-made custom tiny pedal board. (space for 2-3 pedals) and also no noise what so ever.

If you get annoyed by the power-chord input placement, you should consider buying the Harley Benton PowerPlant ISO-5 Pro. This power-supply has a block with 9v inputs and connects to an Adapter. The adapter input is placed at the same face as the 9v inputs and the adapter-chord is not a struggle to run in/over your pedal board. Besides that, the Harley Benton PowerPlant ISO-5 Pro also looks beautiful with that brushed metal look.

The only reason i give this product 4 stars, is to make a point about designing your pedalboard first and after that buying the power-supply.

Conclusion: Harley Benton makes really good products and they all have their own purpose :-) design your pedalboard on paper / scratch first and decide what product works best for your pedalboard / usage. :-)
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Total
quality
Excellent power supply
20.09.2015
This is supplied in a neat cardboard box. Inside lurks the Powerplant Junior, a bag of cables and manuals in English and German. The unit is a robust pedal-sized folded steel box held together with screws. It comes with a captive 135cm mains cable terminated in a Schuko mains plug. As I'm in the UK, Thomann supplied a Schuko to UK adapter with it free of charge. This adapter is robust and works very well. On plugging in, an LED shows the power is on. The unit hums very slightly acoustically, but this is not audible from a few feet away. The black foam feet on the base help with this aspect.

The five 9V DC ouputs are all tip negative, as most pedals require, and are ideal for powering a reasonable sized selection of pedals. Each output is isolated from each other, so this stops ground loops forming, which usually result in obnoxious hum.

A good selection of power cables are provided. There are two sets of standard DC cables (5 short and 5 long), terminated with barrel connectors (right angle at one end and straight at the other). Having both lengths make for neater wiring on a pedal board, without excess cable needing to be coiled up. A "Y" cable is supplied, for powering pedals that need more than 120mA of current. Lastly, a daisy chain cable is included so you can power more than 5 pedals. Some pedals suffer less with ground loops, and the daisy chain will work for those.

In use, my pedals are super clean and quiet with the PowerPlant Junior. It's a huge improvement over batteries, a daisy chain cable, or using multiple power supplies. 120mA per output seems fine for my pedals. It might struggle on some power hungry pedals but the current doubler cable is there for those situations. The standard 120mA output powered a digital delay of mine with no problems.

In conclusion, this is a great product at a bargain price. I should have bought one of these ages ago.
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quality
Small and silent
DominicJ, 13.10.2014
Many people, especially beginners but also the more advanced ones, often seem to struggle when it comes to powering their effects and pedalboards. The most common problem is noise and hiss appearing in different situations. These effects often appear when people power their pedals with several wall warts, when using analog and digital pedals on a single power supply or when using effects in front of the amp and in the FX-Loop on single power supply. I really think powering your pedals isn't that hard to do. Although I often use a Visual Sound One Spot Power Supply when I need to supply one or two effects with power, I think one should use a regulated power supply like the Harley Benton PowerPlant Junior when you need to supply a bigger pedalboard. The advantage is that you get regulated power which is far less prone to noise and every single output is isolated. The isolation of every output is a very important thing especially when you want to use digital and analog effects at the same time or pedals in front of the amp and in the FX-Loop at the same time, because the isolation avoids ground-loops that can appear if the grounds of every output aren't isolated from each other. With the Harley Benton PowerPlant Junior you get five single isolated outputs. That's enough for a smaller pedalboard but you could use a daisy chain to multiply the outputs. You should consider that the current of every output is limited to about 120mA. That's enough current for most analog pedals but digital pedals often tend to draw more than 120mA. If you need more current you need to put two outputs in parallel. The output could also be used to double the voltage by putting them in series. There are cables from Voodoo Lab etc. for that purpose. All in all it's a great product that you should consider if you are looking out for a new power supply.
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quality
does the job
Lars Norberg, 17.02.2021
It does what it says. Provides power, does not provide noise.

Came with a ton of cables. Both long and short, 5 of each, as well as 2to1 cable for using 2 power outputs on a single pedal for pedals with higher ampere requirements, and a 5to1 tentacly output to use up to 5 outputs on a single pedal.

Super happy customer! :)
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$30
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