As I've mentioned before, I'm not quite able to squeeze a Mod 19 build into the space I'm allotted by the family at this time. So I've been looking over what's out there, fooling around with boxplot and generally sifting through things to come up with a solution.

I had picked up the old Loudspeaker Enclosures, Their Design and Use by Altec many years ago (the prices I wrote in the margins are amusing).

Anyway. Real simple here; it looks like the offset of the horn back from the front of the cabinet in this design would be identical in terms of phase accuracy as the Mod 19 considering that the Mod 19 used the front mounting 416B and this cabinet uses the 416A which rear mounts. Is this a correct interpretation?

Given that, considering the smaller size and the difference between centers vertically I am thinking that the N1201A would still be the appropriate crossover for this box. I'm using the 416A the 808-B and the 811B horn.

Does anyone have any experience with this cabinet? It looks like maybe very close to some of the commercial offerings from Altec at the time for home use. The above mentioned text also suggests that the ideal volume for the 416a is 7.5 cubic feet with a standard (non-ducted port). This as you can see is a ducted port.

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Anyway, your comments would be appreciated.

Dan