i just replaced the head unit in the sr with a ripspeed dvd 720v (i think thats what it is called) but to get it to work i had to run both the permantly live and ignition live together. befor this the clock on the dash also didnt work and now it has started to work!!! only problem is i now have to turn the head unit off by putting it on the standby mode. my question is will this have a great strain on the battery or will it be ok because the power to the amp is not on ?