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  • Re: Dunlop Brick creates hum??

Hey guys,

Anyone having problems with the DC Brick creating hum?

I tried using it to power a Boss RC-30. [only pedal I have up here in JHB]

It creates a terrible extremely audible hum. It's played through a Squier Strat into a little practice amp.

There's no hum whatsoever if I use a regular Boss single adapter to power the RC-30.

I've also made sure no wires are crossing and tried different wall sockets.

Thanks, any help would be much appreciated ?

PS: I realize a Pedal Power 2 or Fuel Tank are much better but got a good deal on the Brick. ?
    that pedal will be underpowered by the brick...... it only puts out 35ma per outlet..... :/ sorry.

    Unless you are running super simple pedals go with the more expensive option...
      The RC-30 actually has quite a high current draw. Power supplies are rated, on the case of something like the brick, rated per outlet. If the pedal demands more than the power supply can reliably deliver (it's rating) then you are overloading the power supply and thus going to introduce some noise.

      The Boss USA web site gives a peak current draw for the RC30 as 195ma. The Brick has 1000ma across all it's outputs, but only 375ma across the 9 V outlets (as per the Dunlop web site). Can it then deliver 195ma out of a single 9v outlet?

        Yes, the DC Brick is not designed to power such high current draw digital pedals. Dunlop/ MXR only make analog pedals and it is perfect for those sorts of pedals. It won't be able to consistently deliver the full 195ma required for the RC-30 through one output. There is your noise problem.

        It is also always best to make sure you have extra headroom available from your power supply. In other words, if your pedal needs 195ma, try for a power supply that gives you an extra 50ma over and above what the pedal needs. If you were to drive your car at maximum engine revs all the time it would not last very long. Broadly speaking, it is the same with pedal power supplies.
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