I recently bought a used DBX 1074 Quad Gate on ebay from America to be used in Australia. Our mains voltage here is 230V whilst US is apparently 110V? Just a quick check before I get it, am I going to need to change a fuse or anything? I'll be using an Australian-standard kettle lead, but am I likely to need to make adjustments to the 1074 besides that?
You may need a transformer for that, dbx is not really clear - specs state:
"Operating Voltage 100-120 VAC 50-60 Hz or 200-240 VAC 50/60 Hz"

The US version of the unit states it works at 100-120V 50/60Hz, so I'm guessing you will need a transformer, though you may wanna write dbx about that.