I am planning to upgrade my current stock BOSE system with an aftermarket HU and speakers and need some advice on these topics:
1. Is there any special installation procedure for upgrading this BOSE system (HU and speakers)? i.e., are any special adapters required? Someone mentioned that I may need the Nissan antennae adapter.
2. Is there a separate BOSE amp present and if so do I need to diable it?
3. For the HU I'm considering the Pioneer DEH-P5500MP or Panasonic CQ-DF583U with MP3 & WMA capabilities. Any thoughts? As far as speakers go I expect to spend some $50 - 80 on name brands. What are some quality e-shops besides Crutchfield (great site but not the best prices it seems)?
4. My antennae doesn't extend or retract. Do I need to replace the entire unit or just the mast?
5. Are there any good websites for how to install guides? This is my first time tinkering with a car stereo.

Thanks in advance for all your input.

 

1) u dont really need any adapters, maybe the antenna one but i doubt it
2) yes the speakers are self amplified and the amps are attached to the speakers
3) good choices i'd go with the pioneer (ebay cheapest place to get speakers)
4) most likely the entire unit
5) dunno about good install guys check the audio FAQ

 

Thank you nismos14 for your response. I'm sure your info will be greatly helpful.

 

no problem anything else just ask!