Now at the moment I am fine with my current 9 speaker setup, But when I feel I need to upgrade can you just upgrade speakers and leave factory amp to drive the new speakers. I would replace sub with JL stealth box or a version of my own.
I am almost finished with my major upgrade and soon I will have the write up and pictures.
The first thing we did was to install the speakers with out the sub and leave the factory dsp amp in to see how it sounds out of curiosity. The Speakers are from HAT with the stealth box. The sound quality was not bad, but, it need the power and the crossover settings were not right for these speakers. If you want to go this route, we must fine efficient speakers.
IMO, it is not worth it. The problem is with the factory amp and the settings that can not be changed. From the previous post by Radknight
, that information is correct. I always suggest if you go this way, be prepared to install an amp and the converter. If you read my various post over the years, depending upon your level of music whether you into loud (SPL) or sound quality (SQ), you will be spending money to correct the factory problem.
To answer your question regarding 6x9 or 6.5, I am not a fan of the 6x9 when it come to sound quality. I prefer the mid-bass or midrange punch. Besides the common manufactures or can look for raw drivers. PartsExpress.com or Madisound.com are the best sources. Many of these drivers are the same ones that the named manufactures such as Pioneer, JL Audio, etc...
I do have preview pictures up when hit my name. It show be on my photo album.
Best for now.