anyone recognize these ancient speakers?

[speekergeek]

here is one shot

[speekergeek]

heres 2

[speekergeek]

anyone recognize this brand of speakers? look how they did the cones, the paper was cut from a flat peice in a semi-circle, then it was glued.

[speekergeek]

no xover at all, it is definitly an old pair. the magnets are super tiny. the box wasn't even sealed, it had an open back.

[speekergeek]

the sides are solid wood too. i am gonna refurbish these for a friend, maybe make it sealed and add a simple xover. maybe even add all new drivers.

[Lusso5]

The speakers look like Alnicos to me.
From a quick search on, Sonora - it has quite a history. Started out making phonographs (The Sonora Phonograph Co.), then moved on to tube radio in the 30/40's.

I think they'll look great refurbished. Very nostalgic.

What kind of drivers you plan on using in them? Going to seal it up in the back?

[sreten]

They are not open backed, they are reflexed.

From the days reflexing only considered the panel thickness.
(For such small lengths there is a large correction factor)

I notice both units are open backed.
Not as as big a problem as you'd imagine.
Midrange unit suspension can easily handle bass frequencies.

Replacing the units would make a entirely different speaker.
(I absolutely say you should keep the original units, also other
the terminals it should look like it was made when it was)

I'd suggest listening to the drivers seperately, if the larger unit
is louder then a 1st order series croosover at the baffle step
frequency will improve matters no end.
(this is the only upgrade I'd consider)

Block the section in the back and add terminals and a port,
I'd say around 55hz tuning frequency for an overdamped
alignment. Use a cardboard tube, a varnished tiolet roll tube
sounds good to me.

Line the back and side sections with fibreglass/ rockwool.

sreten.

[speekergeek]

that material that the grill cloth is, is that tweed? i thought i saw similar stuff on parts express. am i wrong there? when the speakers were inside the box, the "tweet" frame was overlapping onto the woofer, they don't fit perfectly, i am almost convinced that these aren't the origional speakers. but if i put them in a new baffle then i can make it all fit, and be air tite. this'll be fun.

[kelticwizard]

Care to give us the dimensions of the box, the thickness of the wood, and the size of the slot in back?

Just curious what they were actually tuned to.

And yes, it does look like fun!

[speekergeek]

i will measure it out tonite, i am at work right now... shhhhh, the boss might hear! I am planning on doing an almost exact replica of the front baffle, except i am going to make the "bar" going over the woofer a hair thinner, and i will move the tweet up 3/4 of an inch or so. of course i will flush mount the speakers on the front, they were mounted on the inside!? that is all for now, gotta go!