Help with power supply for preamp

https://www.aliexpress.us/item/3256...BzA&mp=1&gatewayAdapt=glo2usa#nav-description

I want to buy this pre-amp for an upcoming project and am unsure on the power supply. I really don't understand why dual power supplies are so hard to find when so many things require them. Anyways it calls for a 12 0 12 AC to 15 0 15AC supply but I want to use a SMPS and a voltage splitter module like this. What range of VDC do you think Id be safe to power that pre-amp with? Would 15vdc-20vdc be safe to assume is ok?