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

Harley Benton PowerPlant ISO-1 Pro


Multi-power supply for effect pedals

  • 8 Isolated, filtered and short-circuit protected outputs eliminate noise and hum
  • High capacity for modern digital effects
  • LED monitoring on each output
  • Powered via a 12V @ 2A DC power supply (included)
  • Outputs 1-8: 9 V DC @ max. 500 mA (individualy isolated)
  • Dimensions (W x D x H): 70 x 120 x 25 mm
  • Weight: 200 g
  • Includes 8 cables: 5.5 x 2.1 mm coaxial plug to 5.5 x 2.1 mm coaxial plug with 60 cm length, and 1 Y-cable: 5.5 x 2.1 mm coaxial plug to 2 x 5.5 x 2.1 mm coaxial plug with 30 cm length

Note: The total output load must not exceed 2000 mA.

Available since February 2018
Item number 421933
Sales Unit 1 piece(s)
DC/AC current DC
Output current in mA 2000 mA
9 V Yes
12 V No
18 V No
Secondary voltage No
Multi-output power supply Yes
B-Stock from $41 available
The shipping costs are calculated on the checkout page.
In stock
In stock

This product is in stock and can be shipped immediately.

Standard Delivery Times

876 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.


583 Reviews

A bargain, but I would go with the ISO-2
RomanBirdDog 08.09.2019
It's good to be buying a power supply for a price that seems right! I had been using a daisy chain and it definitely is something else. I power 7 pedals, analog and digital (including a Line 6 M5 which originally comes with a 500 mA adapter) and it's dead silent. I don't know if it's truly isolated or not in the end but I have no reason to think otherwise (except the low price).

The unit looks very good, though I could do without the (bright) LEDs.
It's pretty compact, too.

The main annoying thing is about the cables: 1) they're all the same length, which means some are way too long, and 2) only one end is angled, so if it stays on-board, that eats a significant amount of space. This is made much worse by the fact that there are plugs on both sides of the unit (which at first seemed cool to me). For this reason, I am considering switching to the ISO-2.


No more noise!
Pwb87 24.08.2022
Eliminated all the noise from my pedalboard. If you have a cheap power supply and you are wondering about something new then you need to check this powerplant iso 1. Great thing for a small price!


Quiet power delivery
Des 23.03.2022
Took a chance on this but it has surprised me with how good it is. Very quiet, no buzzing. Bright blue leads for each channel. A good item all round.


so far SO GREAT - gorgeous to look at , light, great design and functional
OGASI 26.08.2019
OK, i got this to power a mix of pedals, kenton midi box and some cyclone TT models

so far it is faultless and running a moog minifooger drive, boss rv6 x 2, behringer OD 300, TT303, TT606, kenton midi thru 5, one more pedal to go to reach maximum (don't have it yet lol)

i should say this in case a reader is not aware, some of the above are digital, some are analogue - NO ISSUES, isolated outs - smooth

con #1 and only (haha if you can call it that)
i have had to supply my own polarity reverse cable for my kenton, still no issues

no noise, no issues, no nothing except nice blue lights (very bright) that sit under a laptop stand

wish i had done this years ago - for roughly 50quid this is a steal

built great, stylish, powerful - cannot recommend more I just wish THOMANN would always supply UK plugs especially when they know the country of residence, free adaptors are great but a UK psu would be better, hint cough

i should add that i only learned of these multi psu things this last year or so, what a great way to have one psu instead of 8!!!! Also, I only learned this harley benton gear is Thomanns yesterday - surprised and not surprised, thomann are a quality distributor/shop so why not have quality gear.