I want to fit my sub 6 x 9's and my two amps in there but can't as there is going to be constant power to the amp when the car is turned off and dont want a flat battery every time i get i it.
The amp will only get power when the stereo is switched on, the switched live that the stereo uses to turn the amp on is only live when the stereo is on, the problem with having no ignition live to the stereo wont affect the amps.
Have a look at the connector you bought from Halfords, chances are the the red & yellow wires are joined at 1 end, this eliminates the need for an ignition live but as youve found out this means you have to turn your stereo off OR remove the front panel