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Cioks Cable Special Flex 2204 - Voltage Doubler Booster, 2.5 mm, reverse polarity, center positive (50 cm)



CIOKS Booster Flex 4 – voltage doubler with 5,5/2,5mm centre positive DC plug, 50cm / 20″ (black / green)

Booster Flex is a special Flex cable with a little step-up converter built in the middle of the cable which doubles the voltage. You should only use it with low current pedals which draw below 50mA, typically What and drives. You can get 18V from a single 9V outlet or 24V of an outlet set to 12V.

Use Booster Flex type 4 with the green 5,5/2,5 center-positive DC-plug is mainly for those 10 older EHX pedals for 24V and should be used with an outlet set to 12V. 

We suggest you only use Booster Flex if you are short of outlets and don’t have two to make 18V or 24V using Stack Flex or Series adapter Flex.

BE CAREFUL when using Booster Flex. There is a risk of damaging one of your 9V pedals by powering it with too high a voltage. Check the specifications of the pedal and if you still have some questions, you’re welcome to send an e-mail to

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