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Post subject: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 8:27 am
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Hi

Here I am again with a new question (sorry for all my questions).
I have a digitech jamman XT that needs a 9V 150mA power suply. Now I was wondering if it harms my pedal when I connect a 9V 200mA power suply to it?

grtz

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 8:59 am
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Does the polarity match?


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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 9:04 am
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Fennycaster wrote:
Hi

Here I am again with a new question (sorry for all my questions).
I have a digitech jamman XT that needs a 9V 150mA power suply. Now I was wondering if it harms my pedal when I connect a 9V 200mA power suply to it?


No, you can connect a 9V 2000 mA power supply to it if you want. The number just signifies the max amount of current you can draw from the power supply. You don't want to go below what the effects pedal needs, but above is not a concern - it will still never use more than 150 mA.


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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 9:05 am
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DarkPenguin wrote:
Does the polarity match?


+1

The grounding protocol must match lest damage to the pedal occur. Most wall warts will have the specifications marked on the housing -- take care that it matches the data found in the outboard device's instruction manual.

Arjay

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 9:53 am
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Most pedals these days are - on tip, + on ring, but, yes, always check first.

Also, some pedals, especially fuzz pedals, can work with higher voltages, like 12V or 18V. If so, beware that many cheaper power supply units can only deliver a fraction of the current on the higher voltage ports, in which case you'll be better off plugging it into a 9V port anyhow.

But the original question about whether it's safe to use a higher mA rated power supply stands - yes, it is. As long as the 200 mA is per port - if it's divided into two times 100 mA, it will be too weak for your 150 mA pedal.


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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 10:06 am
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The current rating on your pedal tells you how much current it requires (150mA)

The current rating on your power supply tells you how much current it is capable of supplying (200mA)

If the current required by the pedal is greater than the amount of current the pedal will draw then the power supply may overheat. In this case the power supply will have no trouble delivering the required 150mA so you're ok to use it.

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 12:08 pm
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Thanks everybody for the information! :D

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 1:51 pm
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Just be sure to check that polarity! Otherwise, that's a paperweight, not a pedal.

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 2:17 pm
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Screamin Armadillo wrote:
Just be sure to check that polarity! Otherwise, that's a paperweight, not a pedal.


Most devices will have a protection diode to prevent this from happening. Just this week I've had a PSU nightmare with centre negative and centre positive supplies plugged in the wrong devices half a dozen times and everything still works just fine.

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 3:11 pm
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GilgaFrank wrote:
Screamin Armadillo wrote:
Just be sure to check that polarity! Otherwise, that's a paperweight, not a pedal.


Most devices will have a protection diode to prevent this from happening. Just this week I've had a PSU nightmare with centre negative and centre positive supplies plugged in the wrong devices half a dozen times and everything still works just fine.


Yup, the smoke / smell will be the dead giveaway, at least on the Boss BD2 that is :roll:, my fault for not getting my sight tested earlier I suppose, who knows though, maybe a square pin / round pin difference could prevent someone from frying their fav pedal that may not be protected.


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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 5:56 pm
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ripitup555 wrote:
Yup, the smoke / smell will be the dead giveaway, at least on the Boss BD2 that is :roll:,


:wink:

I never bet the ranch on someone's drive-by assertion prefaced with "Most devices......".

:mrgreen:

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 6:26 pm
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Retroverbial wrote:
I never bet the ranch on someone's drive-by assertion prefaced with "Most devices......".


"Most devices ... " is right up there with the phrase "... and that should fix the problem" as a noncommital qualifier of internet advice.

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 7:05 pm
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One other thing to check is whether the pedal requires a regulated power supply. For instance, my Malekko ekko 616 must use a regulated 9v power supply. Using a non regulated power supply will damage the pedal. (Trust me on this one) :oops:

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Sun Mar 30, 2014 7:10 pm
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socal323 wrote:
One other thing to check is whether the pedal requires a regulated power supply. For instance, my Malekko ekko 616 must use a regulated 9v power supply. Using a non regulated power supply will damage the pedal. (Trust me on this one) :oops:


No.

It won't.

9 Volts is 9 Volts, a tiny amount of ripple current in an unregulated supply will not damage any pedal. You might get some audible hum but it'll work just fine and will not be damaged.

If you've connected another supply and damaged the pedal then the damage was most likely due to other factors, the fact it was unregulated is irrelevant.

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Post subject: Re: Can I connect any 9V powersuply to any 9V pedal?
Posted: Mon Mar 31, 2014 4:00 pm
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GilgaFrank wrote:
socal323 wrote:
One other thing to check is whether the pedal requires a regulated power supply. For instance, my Malekko ekko 616 must use a regulated 9v power supply. Using a non regulated power supply will damage the pedal. (Trust me on this one) :oops:


No.

It won't.

9 Volts is 9 Volts, a tiny amount of ripple current in an unregulated supply will not damage any pedal. You might get some audible hum but it'll work just fine and will not be damaged.

If you've connected another supply and damaged the pedal then the damage was most likely due to other factors, the fact it was unregulated is irrelevant.


When I first bought the pedal in question, I plugged it into an unregulated power supply. To my surprise, the pedal didn't work. So I read through the manual and notice that it specifically said to only use a regulated power supply as an unregulated power supply could damage the pedal. Well I searched for a regulated power supply and when I found one I plugged it in and guess what, the pedal worked. Plugged in the unregulated power supply again and again, no trabaja. I too thought that it shouldn't make a difference but for some pedals it does. I even emailed Malekko and Paul confirmed it. An unregulated power supply can definately damage this pedal. I'm not saying it will damage all pedals, but it can definately damage some. He said it had to do with some of the discreet components in the circuit, oh well, lesson learned.

I wish I was making this up Frank, but I'm not. :wink: luckily I did not leave the unregulated power supply plugged in long enough to do permanent damage, but it definately screwed with my pedal and I wasn't about to leave it to do sever damage.

I'm sharing this so that anyone else who reads this won't make the same mistake I did. Read your manuals people. :D

Page two, number 14 on the list.
http://malekkoheavyindustry.com/?attachment_id=1310

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