Harbinger one power supply

[HailToTheBlues]

Hi guys,
Just a quick question regarding the Harbinger one project: There's the option of builting it to be used with a 9vdc power supply, rather than the original 18v, but do i need to purchase a charge pump pcb, or does the harbinger pcb has this option already and it is a matter of ommiting some parts? And i know that in the project there's a chart with the parts that i need to ommit for each option, but is this just what i need to do, or do i need to get a charge pump as well?

Also, what do you think is best option, regarding sound, 9v or 18v? Does it change that much?

Best regards

[kothoma]

IC1 (LT1054) is the charge punp. It's already on board.

[HailToTheBlues]

ok then, thanks for the quick answer!