View Full Version : Introduction of the 077

03-07-2009, 04:39 AM
I have a pair of Sovereigns that I purchased from the original owner who claims he bought them in 1970 in B.C. They are 3 way with the 077 tweeter.
Looking through the LHF library I don't see any with this setup. I realize these were custom units so my question is when was the 077 introduced ?
Thanks in advance for any input

Mr. Widget
03-07-2009, 10:14 AM
I don't know definitely, but I believe it was introduced in the '74-'75 time frame. I am reasonably certain that they were not produced in 1970. However since they are based on the 075, your system might have originally had the 075s and then had them upgraded.


03-07-2009, 11:40 AM
I disassembled a horn cluster that my old boss's company installed in 1971/2 and it had a pair of black 077's with the crystal center that was painted. The foilcals had fallen off so I suspect they were the first gen 2405's when the pro line was created.

my 1971 pro catalog ( with widget's avatar ) shows the tweet but does not describe the material...


03-07-2009, 12:00 PM
the first 2405's had a screw that held the wedges in place,I think the first ones came out around 1971 and later productions had the wedges glued on.the centers were not plastic.the one I have has a cast center made of aluminum.

Mr. Widget
03-07-2009, 12:08 PM
..my 1971 pro catalog ( with widget's avatar ) shows the tweet but does not describe the material...You're right! Maybe they were available in 1970?


03-07-2009, 06:34 PM
If you look at the photo you will see a screw recess on the side...and the text provides the "real" impedance...so much for 8 or 16..:)


03-10-2009, 07:08 AM
I bought my first pair of 077s in 1975. I beleive they were marketed as separate components for a few years before that, however.

I do know they were priced higher than the 075 bullets that were around for many years before the 077s were introduced.