PR8 with flat dust cap

[Ski]

I snagged a pair of C54 Trimlines. These have the LE8(T?) and PR8. Similar the the Lancer 44s. Most of the PR8s I've seen have the aluminum dome dust cover. Mine are flat and are of the same textured material as the cones. Can anybody give me a date range as to when these were made?

I also can only find limited specs. Does anybody know the sensitivity of this combination.

PS - They sound great. The surrounds need to be replaced since there is some cracking, but they are stiff and probably deserve a better job than I could do since this would be my first refoam.

[4313B]

http://lansingheritage.org/html/jbl/...-comp/le8t.htm

http://lansingheritage.org/images/jb...ome/page14.jpg

http://lansingheritage.org/images/jb...ome/page13.jpg

http://lansingheritage.org/html/jbl/...s/jbl-catl.htm

http://lansingheritage.org/html/jbl/...e-speakers.htm

http://lansingheritage.org/html/jbl/.../home-comp.htm

[Ski]

Thanks! Yeah, I've seen those but couldn't determine the efficiency of these speakers of the timeframe of their build.