Question about Boss DD20 Digital Delay Pedal DD20 Giga Delay

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I am running the Pedal with a Voodoo Lab Pedal Power Pro 2, so the power is isolated. Whenever i plug it up, the pedal turns on, blinks, then cuts off. When i use a wall wart on the pedal, it works fine. The problem is when i am using that isolated power. And, i DO have the DIP switch on so that it is 12-16 unregulated Volts of power

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The BOSS DD20 uses 9 VDC, NOT 12 -16.

Posted on Jan 02, 2011

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1 Answer

I'm trying to add a Digitech X Series EX-7


You CANNOT use the Voodoo as it outputs DC voltage and the EX-7 requires an AC voltage and of 9 VAC and also 1.3 amps at that.

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Hi :) I have a problem with my Boss mt-2 pedal. Whenever I insert the jack plug in the input, the adapter switches off automatically. The pedal works fine with battery and no problem is created. This only...


Make sure you are NOT using a TRS (stereo or three conductor cable) type cable. PLugging into the input should turn the pedal ON, not off. The switch on the jack may be broken or soldering to the circuit board may be broken OR worst case, there is a crack in the circuit board.

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My Voodoo Lab Super Fuzz stop working. The led doesnt light, and the effect sound doesnt work, but the bypass signal is unaffected... I opened it, and test the resistences they seem to be OK... I don't...


If you are using battery, replace it. If you are not using battery, check your pqwer adapter. Internally, the pwer connectors and soldering around it are chronic problem,

Feb 19, 2011 | Voodoo Lab Super Fuzz Guitar Pedal...

1 Answer

I just bought an M-Audio Keystation 88ES. I have a used Behringer expression pedal. The pedal works fine in the sustain input, but when I insert the jack in the volume input it cuts all power to the...


If the power goes off when you plug in the pedal, the pedal LIKELY has a short in it between two of the three connections at the plug.

Firat, try putting the pedal plug in BEFORE applying power.

Likely the pedal presents a pot or volume control that will have like 5 volts across it an the wiper returned on the same cable. If the wiring configuration is wrong OR if the plug goes through a period of shorting the 5 volts out during insertion that will cause a problem...

To troubleshoot, move the pedal to half way and these with an ohmmeter for shorts between ANY two of the three connections.

Jan 28, 2011 | M-Audio M Audio Keystation 88es 88 Key USB...

1 Answer

There is a constant loud hum/buzz whenever I turn the pedal on. With my Boss Mt 2 Metal Zone effects pedal. It happens whether or not the power supply is plugged in. Ive tried switching cables and...


First and foremost , check your signal chain. By that, i mean put the pedal aside, ...just unhook it and take it out of your signal path. Using the same cables , guitar , amp, other pedals - borrow a friends MT-2 if you can get one , and try THAT to see if THAT works , OR any other kind of distortion pedal. If another one works ok , it's YOUR MT-2. Boss pedals are pretty rugged , but sometimes the little actuator (on/off switch) underneath the treadle (where you push your foot down) will become faulty. That's a high-gain pedal - are you using a basic Strat or other single-coil pickup guitar? If so , are you playing close to any flourescent lights? SIngle coils are noisy around those lights. Will cause a hum / buzz if using a heavy dist. pedal. You can check that by moving around as you play.

Nov 02, 2009 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

How to set up with amp and distortion pedal


With everything switched off. I will surmise that you are using the onboard battery with the foot pedal and not a power supply.
1. Plug lead from guitar/instrument into INPUT side of pedal
2. Plug lead from OUTPUT side of pedal into amplifier INPUT.
3. Turn amplifier volume to about 10 o'clock - to stop blowing your ears out.
4. Turn volume up on guitar to acceptable level.
5. press foot switch on pedal and adjust pedal controls to suit your type of distortion.
6. Play like Hendrix.
Good Luck
ps Just as an after thought rechargeable 9volt batteries are the way to go. I've been using them for years as I always get caught up in the power cable.
If you're going to add another pedal like a Phaser, Compressor, Flanger or what just use small connect leads between each pedal but always, always put the compressor pedal last in the line.

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2 Answers

Sustain Pedal Opposite Effect


I found that if I plug in the sustain pedal BEFORE turning the power on, it works fine. If I plug in the sustain pedal AFTER turning the power on, then it works in the opposite way. Probably just the design. So I would try playing with that before doing anything drastic.

Feb 16, 2009 | Yamaha Full-Size Keyboard

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