Car: 2005 Infiniti G35 with BOSE without Navi

So I just purchased a JDM Double Din as well as a Pioneer AVH-P8400PH and was wondering, do you really need a PAC ROEM-NIS2 or a Metra 70-7551? I need to figure out if I do need one, which one I should order and whats the difference between both of these. I was reading that it will be quiet without one of these.

I have been looking all over and just wanted to clear it up a bit before making a mistake and installing without one of these. If I do then I guess I will order one!

 

With the bose amplifier being retained, and no aftermarket amplifier installed, you need the ROEM-NIS2. It will be quiet with the 70-7551. Of all the adapters that are supposedly equivalent to the ROEM-NIS2, it has by far the best success rate.

If it's on this list, it's not a mistake and it's necessary. The original post doesn't have 157 thanks and counting, and dozens (hundreds?) of completed installs.
https://g35driver.com/forums/audio-v...urce-list.html

All you really need is in the first three posts, you don't need to read all 1,500 posts in the thread, definitely.