i seriously doubt these were ever made by speakerlab. some of the components look similar to the line of raw drivers they offered, but i doubt that vertically mounted horn was their design (the HM700B horn in the big 7 was designed for vertical mounting but not this one).
probably some kind of semi-custom build by a local cabinet shop which thought they might like to get into the speaker business. speakerlab did do some custom work though, but not like this...
From the ad I saw recently as mentioned in my previous posts, apparently there isn't alot of info out there on them, I looked myself and didn't find much of anything........I assume the owner of this pair is the original owner since he says he will forward all info. Not affiliated in any form.
THESE ARE A NON- FOLDED HORN VERSION OF THE FAMOUS KLIPSCHORN. THEY SHARE THE SAME 15 INCH WOOFER (ELECTROVOICE), SAME MID HORN AND SAME TWEETER. THEY WEIGH 165LBS EACH, ARE NEAR MINT, AND COST $2700 IN 1982. THEY THE NAS "STUDIO MONITOR" SERIES. THE COMPANY , NORTH AMERICAN SOUND, WAS A DALLAS BASED SPEAKER MANUFACTURER WHO WAS GOOD FRIENDS WITH PAUL KLIPSCH AND FRAISER. THESE MONSTERS ARE ATTRACTIVE AND MAKE AWESOME HOME THEATER MAINS, AS WELL AS 2 CHANNEL STEREO SPEAKERS. THEY REMIND ME OF MY KHORNS AND ALTEC MODEL 19's IN SOUND QUALITY AND SHEER AIR MOVEMENT! THEY ARE HYPER EFFICIENT AT 98DB @1 WATT @ 1 METER. YOU CAN PUSH THEM EASILY WITH AN EIGHT WATT TUBE AMP! I WILL FORWARD ALL MY INFO ON THESE SPEAKERS TO ANYONE WISHING TO RESEARCH THEM. THEY WERE VERY RARE, THEREFORE THERE IS NOT A LOT OF INFO ON THEM THAT IS EASY TO FIND. AGAIN THESE ARE IN EXCEPTION CONDITION FOR 30 YEAR OLD SPEAKERS AND ARE 1 OWNERS