it dosent use 12v switched for power, in fact it draws hardly any current from the ignition line, but if u have multiple devices running like amps as well it might be a good idea to use a relay
Does the Opus/ITPS/Others draw a large current from the 12v switched line?
My car uses intelligent switching via the CAN bus, so a switched 12v line isn't available from the stereo. I've tapped into a line which is switched 12v and I use that to turn on my amp/car kit (they just use the 12v as a 'sense' voltage).
Problem is, I don't know how much current this line can handle - not a lot I wouldn't think.
Would an Opus be suitable, or does it actually use the 12v switched for power?