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Looking for Altec 604b kit. And possibly cap.

sean sweeney

AK Subscriber
Subscriber
Oops I think I forgot to edit my title. But it's not entirely out of the question regardless.

I was working at a church last night and installing a new Leslie for them that I rebuilt and I saw this rather generic looking speaker box over in the corner but it had a shape kind of familiar so I asked them what was up with it and they said they we're planning on throwing it away! And they had already thrown away the other one that looked like it so I offered them some money off of their bill to take it off their hands and they gladly agreed because I thought I was looking at an Altec! And when I got it home and opened it up it was to my surprise in all original condition with the original crossover! I just took it apart and the horn driver diaphragm of course and no surprise was shattered. And also the woofer had parts of the base reflex in pieces on the inside of the cabinet. But as the day goes on it looks pretty hopeful actually! It looks like the original coil is still relatively intact and not warped and in certain positions doesn't rub as I gently move it a little bit. And I found a vintage style horn diaphragm in my parts stash and the original crossover is unscathed and untouched so I'm wondering what to do about that particularly as of course it will no longer be viable but it looks so cool and all! I have a paper cone woofer that looks to be almost exact dead ringer for the one that's in there. Including paper thickness angle depth and everything and I was considering maybe slicing a ring of it out and inserting it underneath the fragile original wear it stops being there to more or less replace the reflex area. I've I've always out as much as I can and I think that would actually make this a working example albeit repaired. What's the general consensus on my next step? I have done this repair before to other speakers that I valued to save the kits on them. Other than fixing the crossover and this problem with the surround I'm not so sure there's much wrong with it? Aside from the cap in the back missing its terminals and two holes punched in that area, as if they were knocked off...

Interested if anybody has any input. Thank you!
 

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So i did patch the cone... and succeeded! But i think even though it is permanent enough, and functional... it may be too ugly. Guess ill have to go a little deeper with a proper period style cone. Also, what do i do with the crossover? Leave the old caps in for historic significance and sneak some new ones in behind them?
 

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That’s quite a find and good on you for saving it. Such a shame that its twin was discarded (I would be asking where). You might get more interest in this post by asking a moderator to move it to the Lansing Legacy Forum. Lots of knowledgeable folks hang around there.
 
That’s quite a find and good on you for saving it. Such a shame that its twin was discarded (I would be asking where). You might get more interest in this post by asking a moderator to move it to the Lansing Legacy Forum. Lots of knowledgeable folks hang around there.
And it was tossed in a dumpster. Lol. I'm trying to figure out the crossover wiring in this as well. I used the original crossover in this video, but attached a 5uf cap to the tweet to protect it. So glad i had what turned out to be a drop in replacement for the tweet diaphragm. The original was shattered, which is another indicator that the crossover cap in there for that was pretty much entirely knackered! LOL

 
Bump! I restored everything now.
But I still need a schematic for the n1000b crossover so I can Secret some new crossover caps in there without changing the looks too much which I don't want to do by taking this thing apart and ruining the looks of it. This is how the cabinet looks now with some Walnut veneer added to the outside
 

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Call the guys at Great Plains Acoustics in Oklahoma City. They still make 604's and other Altec drivers. They sell diaphragms and re-cone kits too.
 
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