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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1872 written ratings Read all reviews
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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Total
quality

Noiseless awesomeness

yuhan, 04.12.2018
Harley Benton PowerPlant Junior is an amazing piece of gear. The 5 (technically) isolated don't produce any kind of noise and I tried it at high volumes at several venues with a bunch of different pedal, it works like a charm.

If there's is something to be concerned about with this product, this has to be the cables. They do the job but I think their quality don't match the unit. They feel cheap and plasticky, reason why I always carry spare ones.

Another thing which I think Thomann can improve with this product is its power cable length, which measures less than 1 metre when attached to a pedalboard. Although, it works well for home use, this Power Supply Unit is solid and reliable enough to gig with. But sometime on stage, you don't get enough space and that short cable can become a problem. I will replace my power chord to elongate my use.

Other than that, a really good product. I'll be ordering another one to fully power all pedals on my new pedalboard.

If you are starting out or a pro in need of a spare PSU, I really recommend the Power Plant Junior which sells at a good price too.
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NOK 243 €25.13
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