Hi all, I had a look here and there doesn't seem to be a thread that lists power supplies for unusual voltages. This came up because I use two Eden pedals, which are centre-positive 15v pedals. Along with six 'normal' 9v pedals. It took AAAAGES to find a selection of power supplies that would meet that need. So perhaps to save some people some time, here are the options I found. Anyone who knows of others, feel free to add. Palmer PWT-12 Mk 2: https://www.thomannmusic.com/palmer_pwt_12_mk_2.htm?ref=search_prv_9 8 9v outputs, 4 outputs variable between 9-18v. This is the one I ended up buying. MXR M 238 Iso Brick: https://www.thomannmusic.com/mxr_m_238_iso_brick.htm?ref=search_prv_7 6 9v outputs, 2 18v outputs, 2 outputs variable between 6-15v. Cioks 'Cioks 8': CIOKS 8 – CIOKS 4 9v outputs, 4 variable outputs between 9-18v. Not yet for sale, as far as I can see. NOT TO BE CONFUSED WITH THE CIOKS DC8! Cioks 'Ciokolate': https://www.thomannmusic.com/cioks_ciokolate.htm?ref=search_prv_6 3 9v outputs, 1 variable 4-15v, 1 variable 18/24v, 4 variable 9/12v, 4 variable 9-15v, 3 variable 9-16v AC. Pricey, but probably the most comprehensive power supply out there! Those are power supplies, there are also power converters: Radial Stagebug SB-15: StageBug SB-15 - Radial Engineering A buffer that also takes two 9v inputs and converts them into 1 15v output. Best value is the Xotic XVD-1 Voltage Doubler: Takes a 9v input and converts it to either 15v or 18v output: https://www.thomannmusic.com/xotic_voltage_doubler_xvd_1.htm?ref=search_prv_14 If you go for the GigRig system, there is also a 9v to 15v converter (the 'El Paso'): High Current Power Adapter Hope this helps!