Edge Amp Doesn't Turn off When Ignition is off

[Tom.morgan.95]

I know this looks like the age old issue of an incorrect REM, but I'm stumped where I'm going wrong. Brand new Xplod HU, spliced REM wire from the back to the amp. Tried it in the aerial REM and the red Ignition lead. When Ignition is off, the amp is on, when we break the REM connection, it goes off. The only thing it could be is a short in the REM to pick us constant 12V, but I've checked my wiring and I've insulated everything. Plus the amp terminals have big plastic shrouds so its not shorting there... Fault with amp/HU? Help please!

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