Anyone know if the power antenna signal survives setting the unit to CD? My installer hooked it to ingition because he said alot of cars now turn the ATN off when you select CD. It gets cold here and I don't want all the amps coming on every time I start my car!!! I'd like to find a "remote on" signal from the stock non-bose system to turn amps on with the deck, whether on radio or CD. Can I do this? Which signal?

I have the stock non-bose 6CD changer, no nav, 4d sedan.

Also, still looking for accurate info on size of stock rear door speakers for this car. My forum searches give mixed results of 6.5" and 5.25" Thanks!