Need help on Dynavin install + amp/sub questions

[patrickkc]

As some of you know, I ordered a Dynavin unit last week. I'm sitting at home with nothing to do and am thinking if I should try to attempt to install it. I tried to look for some DIYs, but there aren't much. Most of them are work around for DSP systems. Some questions I have for the ones that have installed.. Where did you guys mount the GPS antenna?

Also, I have attached a picture. I have no idea where to plug these 2 items into.




On to another questions, I'm also interested in putting a sub in the x5, but I don't have DSP/nor factory sub. I found JL audio Stealth box on Ebay but am told that I need a new amp to power the sub. The Ebay store recommended me JL AUDIO XD300, which was around $290. I asked for something a bit cheaper, but also sufficient to power the sub and this was the price/item they recommended.

JL AUDIO
SB-X5/10W1v2....................$479.95
JX250/1................................$109.95 (This amplifier is 250 watts which provide the power need for the 10W1v2 sub)
XD-ACS30...........................$44.95 (Complete power amp kit for installation on the JX250/1)
HI-LOW................................$19.95 (This is a hi to low converter for audio signal from your factory head unit to the JX250/1 mono amp)

USPS Priority Air Mail........$142.00

I really don't know anything about subs/sound systems for cars, so if any audio gurus can give me some feed back on these items, that would be perfect! I was thinking of the HI-LOW converter, I will be running the Dynavin unit, so it is different than the factory head unit? so do I still need buy that?

sorry for the long post! just having tons of questions that I couldn't really find answers for.