Hi, this user's board is new to me, so I hope this is an acceptable question. I recently began restoration of a pair of Altec Monitors.

Each cabinet has a 15" driver and a horn. Additionally there are 2 3" (or so) round ports. These cabinets also contain an amplifier and electronic crossover model number 770.

I have photographs, but am not sure how to post them.

The only reference to the cabinet design is found on the inside rear cover of the Altec "Loudspeaker Enclosures...Their Design and Use" catalog I have.

thanks for any information.

Chris