I'm building a vintage inspired sound system for my workshop and for the amplifier I need a dual 12v power supply, three wires: 12v-0-12v.
I ordered a MM-2018 from Jaycar after seeing it recommended for similar kit amps on Trade Me, but it turned out to be 24v-12v-0 (the product picture on their website is misleading and I was in a hurry, so serves me right I suppose). I can't seem to find what I really need on their website and I couldn't make sense of their reply to my inquiry.

So my question is, am I just misunderstanding the labeling and can I still draw dual 12v from this? I suspect not, so can I alternatively split the 24v to get two 12v? I'm not sure if that would be wired in parallel or series.
Any help would be much appreciated, thanks!