EHX Canyon and power supply issues
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Posted: 22 November 2018 07:03 AM

Hi All,

I’ve reached the stage where I feel it’s time to move on from the ‘cheaper’ pedals on my board anad one of the first decisions I’ve made is to jump from the Tone City Tape Machine to EHX Canyon. I love the Canyon and it does everything I want plus a whole lot more that I never knew I needed! I do have a problem however:

Although my Canyon works great when set up on it’s own I can’t get it to work with my power supply (Dr Tone PSU10) the LED blinks on and off quickly and the pedal just producers a quick tapping sound and doesn’t even bypass. It’s otherwise unresponsive.

I’ve disconnected EVERY other pedal from the power supply and still get the same problem. The port hat I’m using from the Dr Tone is 9V 250mA so it should be sufficient as Canyon requires 9V 150mA? I’m tempted to turn the adjustable outlet up to 12V but am scared of frying my new toy!

Am I destined to just get a new power supply?

For info the other pedals on my board are
Tone City: Comp Engine, Bad Horse, Angel wing
Boss: SD-1, DS-1, RC-3

Thanks for your help

Edited: 15 March 2019 08:52 AM by EHX STAFF
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Posted: 22 November 2018 01:33 PM | Link to this reply (#1)

Cranking the voltage will fry the pedal. The Canyon needs min of 150ma. It sounds like your supply is starved out of current.Please use the EHX supply until you get things sorted out.
Sorry I do not no anything about the supply you are using. The combo of pedals may be drawing to much current.
bet to check with he company that makes your supply.
You can reach our techs on Monday as its a holiday here
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Posted: 22 November 2018 02:48 PM | Link to this reply (#2)

Thanks for the response. I don’t think there’s a shortage of mA though as the power supply pushes out 250mA versus the 150mA required and I removed all other pedals to test.

Anyone else faced this type of issue?

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Posted: 29 November 2018 02:18 PM | Link to this reply (#3)

After a month or so of using my new Canyon (in a Snark-powered daisy chain) with no problems, it suddenly started doing the same thing. It works fine with the EHX supply, but I wonder why this would suddenly happen, and why it won’t stop.

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Posted: 29 November 2018 03:22 PM | Link to this reply (#4)

Are you sure you made absolutely no changes to your pedalboard? You didn’t change the order of any pedals? Or whether or not they start switched on?

Supplying power to modern digital pedals is just a bit more tricky than just supplying the proper voltage and wattage. All analogue pedals have to sort of “warm up” before they work. That’s why most all analogue pedals engage the battery when you plug in rather than when you press the footswitch. If they “turned on” when you pressed the footswitch there could be an unacceptable delay, so instead they “turn on” but in bypass mode when you plug your guitar in.

Digital circuits have to do a bit more. They are essentially little computers that have to boot up. Just like your mobile device takes some time to boot up if it has been shut down completely, a digital effects pedal takes some time to boot up. The more complex the circuit, the more time it takes to boot.

Power supplies have something called a ramp up time. That is, how long does it take for the power to reach maximum when it’s turned on or when something puts a load on it. If the power supply doesn’t reach the required levels fast enough for the pedal to do its boot sequence, then the pedal can “hang” just like a ‘puter when one of the many interacting chips fails to initialize in time.

Now, imagine a daisy chained power supply with each of those pedals putting a similar but different load on the system with different timings. It all happens very quickly, but it’s not instantaneous. Initially, there’s a very spiky, dirty, distorted power signal that could be seen differently depending on where you are in the chain. That’s one reason that isolated power supplies are nice. The ultimate in isolation is each effect having its own specialized power supply.

My largish pedalboard is almost exclusively EHX pedals. I also use some daisy chained power supplies, and I also have a couple of pedals that just don’t play nicely with others. They seem to generate a lot of noise when sharing a power supply with some other pedals. Moving them around helps, but I’ve just settled on having them use their own supplied adapters. It’s simple. I start by adding a pedal to a daisy chain. If it works, great. If it does anything weird, it gets its own power supply. I’m sure I could solve the problem with a really expensive, professional, isolated power supply, but those have their own problems, like what do you do if you need a 24v positive tip? What do you do if you need a 9v AC power supply? And they don’t help you with vintage effects with plugs built into the box. So, you still end up having to run separate power supplies anyway, or spend even bigger bucks to get a power supply that supports that ONE effect you have that isn’t 9V DC Negative Tip Cylinder.

Edited: 29 November 2018 03:25 PM by gvelasco
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Posted: 29 December 2018 12:31 PM | Link to this reply (#5)

I have the same problem with 2 brand new Grand Canyons. They work fine on a Boss power board but flash stupidly with no sound on my beringher board. I have 20 pedals that all work on both boards but not the GC.
I have tried various configurations including the pedals on their own. It is quite definitely an EXH fault!

I going to go back to the TC electronics Flashback if there isn’t a simple resolve. The Flashback is excellent, I just fancied an alternative for variety but wasn’t banking on the unexpected hassle.

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Posted: 29 December 2018 07:59 PM | Link to this reply (#6)

Same issue here.

9.02V and 300mA power supply. When I turn the knob to octave it does that weird thing.

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Posted: 01 January 2019 02:06 PM | Link to this reply (#7)

Please write the techs at
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Posted: 01 January 2019 03:46 PM | Link to this reply (#8)

I did and they replied that the canyon doesn’t like daisy chains. After a little research I found out that the problem is the power the pedal gets. My psu gives 9.2V while the ehx one supplies almost 9.8V. The specs in the leaflet say that’s the pedal needs 9V/150mA which I believe is wrong. Supplying the pedal with 9.5V-9.8V does the trick, but anything below that threshold causes the issue. Don’t get me wrong the pedal is amazing but it does *not* work on 9V. The specs are wrong. The difference is insignificant but I guess it’s the little extra juice the processor needs to run its script.

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Posted: 02 January 2019 09:43 AM | Link to this reply (#9)
apos - 01 January 2019 03:46 PM

I did and they replied that the canyon doesn’t like daisy chains. After a little research I found out that the problem is the power the pedal gets. My psu gives 9.2V while the ehx one supplies almost 9.8V. The specs in the leaflet say that’s the pedal needs 9V/150mA which I believe is wrong. Supplying the pedal with 9.5V-9.8V does the trick, but anything below that threshold causes the issue. Don’t get me wrong the pedal is amazing but it does *not* work on 9V. The specs are wrong. The difference is insignificant but I guess it’s the little extra juice the processor needs to run its script.

No that is not the issue. Most likely the power supply in question drops voltage under a heavy load.
You have to measure a power supply voltage while being loaded down.
Many of the cheap daisy chain supplies fold under a load when using higher current digital pedals.

 

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Posted: 02 January 2019 10:12 AM | Link to this reply (#10)

Hi and thanks for the reply. My psu is an ebs one. EBS is a respectable company that makes amazing bass amps and pedals. The 9.2V measurement has been taken while all my pedals were connected and turned on.

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Posted: 15 March 2019 02:14 AM | Link to this reply (#11)

I just bought a brand new canyon from the big box giant and they didn’t include the manual, box or Power Supply. They knocked 10 bucks off the price and I figured I didn’t need the box or paperwork but now I’m stuck with a pedal that won’t work in my boards and doesn’t seem to work properly on its own with a boss psa, Ibanez 9v, or my one spot. It works but sounds like it needs more power or straining when tapping tempo changes or looping.
Can I get a power adaptor or should I return this? Wish EHX would educate the dealers about this issue. When you buy a little pedal like that, you kind of expect it to work in a chain.

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Posted: 15 March 2019 08:52 AM | Link to this reply (#12)

You basically bought a used pedal. We can not control what a sales person in a store will do.
It should work great with any 9 volt 200ma supply. It is center negative.
Less than 150ma and it will not work properly.
Most Boss adapters will work fine.
Daisy chaining power supplies can cause problems if hey do not have isolated outputs.
The cheaper ones do not.

Here is a full page of the correct supply:
https://www.google.com/search?q=ehx+supply+9.6+voly+200+ma&ie=utf-8&oe=utf-8&client=firefox-b-1

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