Could be called a Barn-Find of speakers really. Boxed and stored over 20 years ago when I owned a 1985, Porsche 928S. Had purchased a completely new speaker set for the car, and although I didnt know it at the time, one day, someone was going to need these - maybe you? The additional good news is that I am a career live sound professional, so I understand the condition of a speaker and also how to properly test them. A thorough rub and buzz test has been performed on these and they maintain their 4 ohm resistance as shipped from the factory. The surrounds are still very supple with no hardening (a benefit of storing in proper boxes with controlled temps). Even the original stickers remain on the rear of the drivers. Outside of one small water stain that I found on one speaker, they are immaculate and ready to drop into your Porsche project. These came in a 928S but they may have been used in other Porsche models as well? You would know better than I.