406A 10" drivers $169 pr BIN Epay

[Phil-G]

EARLY Vintage Altec 406A Bolero 10 Inch Woofers EXCELLENT ANICO | eBay

these have got to be good for something. they have large Alnico magnets. nice looking cone

[bowtie427ss]

I'm not sure they'll have the extended range of the later, heavily revised version with dia-cone, and 3 inch voice coil..

[Old Guy]

SOMEWHERE I have a data sheet for those. As Bowtie says the coil is smaller, I think the Alnico slug is also. The are probably worth the price, though I'd prefer the 406C.
I need a 425 for my little Fender guitar amp.

[GM]

No clue if of any use for 406A, so strictly FWIW, FYI, etc.: Altec 406 - 8Y - diyAudio

GM

[Old Guy]

No clue if of any use for 406A, so strictly FWIW, FYI, etc.: Altec 406 - 8Y - diyAudio

GM

406A is small coil and stamped frame
406-8y is larger coil and cast frame

[GM]

Thanks! Still, I wonder if specs are much different WRT cab alignments.

GM

[Old Guy]

Thanks! Still, I wonder if specs are much different WRT cab alignments.

GM

I think the earlier one is more of an extended range where the newer is closer to a woofer, following the evolution of other Altecs. Been a while since I have seen either, but I recall the 406a as having a thinner, lighter cone.

[bowtie427ss]

I think the cone profiles also differ with the 406a/b having more of a straight sided cone and the 406y/z having a more curvlinear cone profile.

[GM]

Thanks! All good to know, especially WRT vetting sales BS, but unfortunately doesn't get us any closer to an answer and in retrospect, short of OEM documented specs we may never know since too much time has elapsed for any point source driver to maintain its parameters 'close enough' unless used ~daily in a sealed box playing a wide range of music.

GM

[Earl K]

Here's the response of a 406-8C(Y).



One can see the 3" coil version is already pretty extended.

Compare to;

and

( One can see the source of my pics )



PS; proof that the 4" voice coil can also support an extended range driver;