[KevinH1990]

I installed a 6-channel HAES amp from a 996 cabriolet. The 996 amp had outputs for the rear speakers. Here's a link to instructions for adding the HAES amp if you decide to use that option: https://www.renntech.org/topic/29250-rear-speaker-wiring-to-a-haes-6-channel-amp/

The advantage of using the HAES amp is that it fits in the space for the amp that was originally installed in our cars. However, I expect other amps or your head unit would provide better sound quality.

My sound system (and audio installation skills) have evolved over the years. If I were starting from scratch today, I would probably install a good 6-channel aftermarket amp in the front trunk and use that to power the speakers.

Adding rear speakers will help the audio in the car, but you may still feel like it is lacking something. I found that upgrading the dash and door speakers made a significant improvement to the sound in the car. I recently added some larger and better quality woofers to the doors. You can read about that here: https://986forum.com/forums/boxster-general-discussions/79558-door-speaker-recommendations.html