Freddie75 Posted May 4, 2015 Share Posted May 4, 2015 Hi, I've just purchased one of these pedals and am trying to power at 18v. The pedal comes with an 18v power adapter, - (however this is a 2 pin plug) as well as a 9v red cable. At 9v the thing can distort so am looking to power at 18v. Does anybody know if a standard 18v pedal power adapter will work? I purchased a voodoo lab y cable but not sure I understood the concept of the thing. I have a power brick and I thought by plugging the y end in to 2 of the power outs of the brick will give me 18v - however the pedal is not powering up when doing this. Any help appreciated here! Thanks Freddie Quote Link to comment Share on other sites More sharing options...
pete.young Posted May 4, 2015 Share Posted May 4, 2015 An 18V power adaptor will work, effectspowersupplies.com have them. There are two kinds of Y cable. A voltage doubler will the way you suggest. A current doubler will give you twice the current that you would get from an isolated supply at the same voltage. Its possible that the power supply isn't delivering enough current for the pedal and that's why you are seeing issues. Quote Link to comment Share on other sites More sharing options...
Freddie75 Posted May 4, 2015 Author Share Posted May 4, 2015 Thanks Pete. Its definitely a voltage doubler cable I have. I might look at a better power brick.! Thanks Freddie Quote Link to comment Share on other sites More sharing options...
pete.young Posted May 4, 2015 Share Posted May 4, 2015 Which one do you have? Quote Link to comment Share on other sites More sharing options...
Freddie75 Posted May 4, 2015 Author Share Posted May 4, 2015 Just a cheap one - think it cost about £25 with about 10 9v outputs. What would you recommend? Many thanks Freddie Quote Link to comment Share on other sites More sharing options...
pete.young Posted May 4, 2015 Share Posted May 4, 2015 Just done a little more digging - it appears that this pedal is 18VDC centre positive - can you check that? If so it might explain why it doesn't power up from the power brick, which will almost certainly be 9V centre negative. If so you need to make sure you get either a centre positive power supply, or buy an polarity reverser. The red cable probably has that built-in. Quote Link to comment Share on other sites More sharing options...
molan Posted May 4, 2015 Share Posted May 4, 2015 The red cable is used to reverse the polarity I think. I've got a Diamond kicking around, I'll check it out ASAP! Quote Link to comment Share on other sites More sharing options...
JapanAxe Posted May 4, 2015 Share Posted May 4, 2015 [quote name='Freddie75' timestamp='1430738085' post='2764106'] Just a cheap one - think it cost about £25 with about 10 9v outputs. What would you recommend? Many thanks Freddie [/quote] A cheap power brick like that will not have isolated outputs, so you can't use a voltage doubler cable with it. Quote Link to comment Share on other sites More sharing options...
molan Posted May 4, 2015 Share Posted May 4, 2015 I've just been checking mine and it seems to be working fine off a simple Diago 9v power supply with the red cable used. Plenty of power and compression available at 9v and I can't get it to distort Quote Link to comment Share on other sites More sharing options...
Freddie75 Posted May 4, 2015 Author Share Posted May 4, 2015 Thanks guys, just purchased a standard 18v pedal adapter, will use with the supplied red cable. Used it at an indoor gig on sat at 9v and was fine, used it on an outdoor event yesterday - more volume needed and was distorting when digging in. Thank you all muchly for your help on this! Regards Freddie Quote Link to comment Share on other sites More sharing options...
molan Posted May 4, 2015 Share Posted May 4, 2015 I've just spent some ore time with a much higher output active bass and I can get it start hitting the threshold with a little bass boost and hitting an open E pretty hard. I'm running it side by side with a Demeter Compulator and an Aguilar TLC and neither of those are affected by this setting on the bass so I have to assume the Diamond does need that 18v power supply if you're boosting your signal at all and hitting low notes fairly hard. The 18v power supply should sort it for you Quote Link to comment Share on other sites More sharing options...
Freddie75 Posted May 4, 2015 Author Share Posted May 4, 2015 [quote name='molan' timestamp='1430759350' post='2764342'] I've just spent some ore time with a much higher output active bass and I can get it start hitting the threshold with a little bass boost and hitting an open E pretty hard. I'm running it side by side with a Demeter Compulator and an Aguilar TLC and neither of those are affected by this setting on the bass so I have to assume the Diamond does need that 18v power supply if you're boosting your signal at all and hitting low notes fairly hard. The 18v power supply should sort it for you [/quote] Thanks Molan Regards Freddie Quote Link to comment Share on other sites More sharing options...
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