I was browsing ebay and came across this lot of 3 Altec 604B drivers. One of them has some ribs on the cone that the seller describes are "styrofoam cone stiffeners for improved cone breakup characteristics".
Was this a common thing to do? Does it work as described? I have heard of people stiffening a 604 cone with some kind of epoxy but I have never seen these ribs.
Another thought is I wonder how much these 3 604B will go for
3pcs. ALTEC 604B COAXIAL WITH N1000B CROSSOVERS | eBay
Attachment 3468
I've never seen it before and to me it detracts from the value, big time.
That said, I'm no Altec expert but I would think if it made a significant improvement that Altec themselves would have incorporated a cleaner version of that mod into the drivers. Looks like a recone is in order.
BillWojo
There's myriad ways to control cone break-up and this is one of them, but to do it to now irreplaceable diaphragms, especially ones that respond best overall to doping? Oh well, to each his own, but I seriously doubt any Altec fan will like its flatter/duller 'tone'.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
I would use the two good drivers and sell the 3rd. I bet its worth more with the original cone even with the styrofoam braces.
I don't see any reason to really modify the 604 driver itself. You can mod the cabinet, xover, electronics etc and get a much better result.
I'll take 2, hold the foam please.
At least they didn't make it look like it just had a litter of puppies.
Last edited by bowtie427ss; March 29th, 2017 at 12:34 PM.
Not all vegetables make good leaders.
My all time fave 'full-range' driver. A pity more weren't made and/or survived.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
At $3k/piece, I bet they don't sell at all. Maybe there's a hopped up guy in Hong Kong that needs 604b's and will pay anything but I doubt it. The foam bracing is a detriment, IMO.Another thought is I wonder how much these 3 604B will go for
Bowtie,
Liking that RCA driver. You don't see many of them around.
Thanks Westend! That one isn't mine, just a hacked interweb pic. I've had an LC-1, and two LC-1A's all at different times in the past. It seems like some other deal too good to refuse always turns up and demands the capital before i can procure a mate.
One well sold LC-1 buys a lot of Altec.
Not all vegetables make good leaders.
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