18v 5A DC or increased to 48v should not hurt the amp. *I am not confident from the 18v bare minimum advisable amperage ranking to the chip, but 3A or maybe more must work. ryanmh1 said: EDIT: Latest products are "good" or "exceptional" from the "most people Do not listen https://pingdirapp51.directoryup.com/top-level-category/displays-holders