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In the Forum: Horn-Loaded Speakers
In the Thread: 3 way Tractrix Horn Build Questions - and Introduction!
Post Subject: Takes timePosted by anthony on: 1/27/2021
For a large horn like this you can't glue all the rings together and start turning because the imbalance wil shake things to bits plus you have to account for where the cutting tool can safely and physically reach. So the process is to glue a few rings together...next day once the glue is dry turn those rings then glue the next group on...come back the next day and turn those rings and glue the next batch on and so on. Maybe a couple of hours work a day spread over quite some time for the big horns.
A pair of smaller horns like the 400Hz can be cut/glued/turned/sanded/undercoated in a weekend, say 20 hours of work. Larger 250Hz horns might take 4 days to get undercoat on a pair, so 40 hours. The 100Hz horns of which you only see the front half of one horn in that photo take maybe 150-200hrs to get to undercoat stage, but that work is spread over a couple of months the way I do things.
Just a 'normal' lathe but I built my own back-tables for it and cutting tools.
No amount of money would get me to turn horns for someone else...I kinda wish I'd got someone else to do mine for me because despite best intentions finding time for this has proved a major issue.
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