I see a lot of what looks like 604's in the trusonics at this link.
?I?[?f?B?I?̃m?[?X?T?E???h?E?v??
Just an FYI, my brother offered a pair of Trusonic 15's, I need another set of speakers like a hole in the head.
I remember seeing them they look good. He wants 150 for the pair, if you PM me yer email I'll forward.
One does have a tear that looks minor and could be patched from the back pretty easily. He says he can do it, or the buyer can. But for the price...yeah I know they ain't Altec, but for somebody poor who has horns...
Your neighbors called. They like your music.
I see a lot of what looks like 604's in the trusonics at this link.
?I?[?f?B?I?̃m?[?X?T?E???h?E?v??
Not exactly 604's.Originally Posted by cradeldorf
But, since you have seen a connection/resemblance, would you care to guess who Mr. Stephens might have worked with once upon a time?
You might find this an interesting read: SHEARER HORN
Not all vegetables make good leaders.
I believe it would.Wouldn't be Dr.Hilliard would it.
Until i read the Shearer Horn article again, i had forgotten just how early Mr. Stephens' involvement was.
Not all vegetables make good leaders.
Here's a quote from a circa 1948 Stephens Tru-sonic catalog:
"STEPHENS MANUFACTURING COMPANY FIRSTS
FIRST COAXIAL SPEAKER UNIT
First to design, manufacture and sell Multicellular Coaxial 2-Way Speakers. The first Coaxial Unit is one of twelve TRU-SONIC 2-Way Speakers which have been in continuous round the clock operation at Lockheed Air-Terminal, Burbank, California, for seven years. These speakers have required not one penny's worth of servicing."
^^^^^^^^^^^^^
Now I have always doubted the truthfulness of the above, as Stephens was a notorious copycat. This catalog was printed with the Los Angeles address, where they were located until 1947 or 1948 when they moved to Culver City. The catalog (I have only a photocopy) had been rubber stamped with the new Culver City address, so it was handed out soon after the move. Going back seven years as per Mr. Stephens' claim would take us to 1940 or 1941. Jim Lansing stated in his 1943 article "The Duplex Speaker" that work began on this unit at Altec Lansing in 1941. These folks are all gone now, so who knows?
The Stephens 15" coaxials began (I think) with a field coil model called the E-52A. By the time of this catalog, production had shifted to the permanent magnet P-52A. As with all their later permanent magnet versions, a single magnetic circuit energized both the high and low frequency voice coil gaps. One seeming advantage of the Altec approach was the use of separate magnetic circuits for the two driver sections. It is easy to spot the Stephens units as they have an eight cell (2x4) horn as opposed to Altec's six cell horn. Interestingly, the Stephens horns were always hand soldered sheet metal constructions, very similar to the hand soldered horn used in the first Altec field coil Duplex model 601.
Your neighbors called. They like your music.
LOL, I guess a decade has slipped by without our making much research progress over at Lansing Heritage. Leo Bostwick's patent probably describes the world's first efforts at building a coaxial two way speaker unit; it was Bill Woods of Acoustic Horn Company that pointed out that patent to us. Western Electric built some two way coaxial horn systems in the late 1930s (I have also seen them described as Langevin). RCA made their Twin Power two way coaxial horn system from the late 1930s to the mid 1950s. Both the W.E. and RCA systems were used at the 1939 New York World's Fair. The W.E. system is discussed and pictured in this thread:
Super rare Western Elecrtic speaker on the bay
We covered the RCA Twin Power somewhat in this thread:
http://audioheritage.org/vbulletin/s...133#post137133
Excellent read buddy, knowledge is good for the soul. Thanks :2thumbsup:
I did get a pic request, he has since listed them on FeePay...
Vintage Trusonic 15's PAIR - eBay (item 320609581383 end time Oct-30-10 16:50:31 PDT)
Your neighbors called. They like your music.
Posting Permissions
Bookmarks