- Pedals with higher voltage requirements can use this voltage doubler cable to combine two isolated power supply multi-outputs and thus provide 18 V or 24 V - Suitable for various Electro Harmonix pedals - Power supply: 2 x 2.1 mm coaxial - Pedal connector: 2.5mm coaxial socket - Polarity: Reverse (center positive) - Length: 46 cm EUR 10.00 - See more - Buy online