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In the Forum: Horn-Loaded Speakers
In the Thread: Garg wants more horns.
Post Subject: SwitcheroniPosted by Gargoyle on: 8/12/2024
I have made an attempt to coarsely align these speakers.
There was a technique I that read said to reverse the polarity of
the tweeter, then play a sinus at the Xover freq then listen for nulls.
This sounds like a good idea but did not work out for me in reality. It
may work if you had a second person and a adjustable track to put the
twitter on. My free-hand attempts were hit and miss. I was too close.
As an alternative I measured the magnets, they are both 15mm
thick so i just lined them up. This assumes the voice coils are in the same
position in relation to the magnet, which they likely aren't.
Then I set the speaker box on it's side, mounted the tweeter on
top, so that it was closer to the woofer. I actually did not mind this
sound for better or worse, however I ended up completely flipping them
upside down to get the drivers away from the surface of the desk. The
desk is a temporary home so the situational improvements in that regard
are somewhat ignored.
In hindsight I should have mounted the tweeter closer to the
woofer before I tried that nulling technique. It would however still
need a adjustment track. It seems like the ability to align needs to be
in the final speaker so I will try to incorporate it into the mounting
of the horn. The plan and assumption is that I can use this umik and REW
to align, but not much point right now if it's just tape to fix
the position.
I'm starting to think about mounting solution for the horns as I'm going to get another channel soon. I don't want to use masking tape and a broom for that. I could make clamps for some round metal electrical conduit, or maybe just a piece of wood to screw the mounts too. While it is premature to commit to a design I could go with something if it was modular enough. A metal pole seems pretty modular although not very aesthetic.
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