So a friend of mine gave me a pair of slightly ailing Karlson 15 cabinets a while back . . . they needed the wings rebuilt, and DEFINITELY benefitted from some internal bracing. I had a reconed Altec Biflex woofer which sounded surprisingly good in the Karlson - I only had the one, so I stuffed the other with a random console woofer. . . I was using them for < 100 Hz
duty, as I have a pair of homemade open baffle line arrays which use KLH fullrange drivers.....

The franken - reconed Altec sounded very promising, but I never thought I'd score a PAIR of Altec's to stuff in them. . fast forward to this year's Kutztown PA radio swap . . . I traded an all original Heathkit AA-32 for a pair of Altec 418b's I'm no Altec expert, and didn't know until later that they are 'musical instrument' speakers. Some of the guys razzed me for what they thought was a silly trade . . .

o contraire mon frere !

I looked up the spec's upon returning home:

100 db @ 1W/1m
55 Hz res. freq.
100 watt power rating

YEE HAW !

Because I'm only running the Karlson's for the sub-100 Hz duty, by way of a pro audio active xover, I wasn't worried about their original application . . . this combination thumps like crazy ! very accurate bass to my ears . . .

I used them for bass bins at my wife's 10 year college reunion, and have also used them to relieve my JBL C38's of bass duty . . . these Altec's just eat up power like nothing else I've heard . . at the 'DJ gig' I had 200 Watts going to them, and they just sounded amazing . . .

anyone else using Altec guitar speakers for 'non-standard' applications ?