Anyone know who the manufacturer of the TSX stereo is?

 

speakers are Pioneer, Nav headunit is Alpine

 

I don't know about the 2004, but the 2005 and 2006 is made by Panasonic.

 

You can find TSX sound system info in the FAQ thread in Audio & Video:

https://acurazine.com/forums/audio-video-electronics-navigation-22/%2A%2Aaudio-video-diy-info-faq-all-models-%2A%2A-299065/

If you have further questions I suggest you post them in Audio & Video. The members who frequent that area are quite knowledgeable and the chances of getting them answered are quite good.