use of speakers

[buffo]

have a few speakers 416 8c 808 8a drivers both 811 and 511 horns some n800f xovers wondering if they would work well in a7 cabinets

[srm51555]

Welcome to the forum. That combination will work just fine. I ran some similar 807's with a 511 and a ~9cf cabinet for my 416's. If you have some soldering skills I recommend using a variation of the 30904. Some conversation of it started back up here (http://www.audioheritage.org/vbulletin/showthread.php?39347-Altec-Valencia-Rehab&p=403761&viewfull=1#post403761). Do you have the cabinets already?