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In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: That will be fun to experiment.Posted by Romy the Cat on: 8/29/2017
Looks fine, Anthony. I am not sure what resonance frequency tells
you. Anyhow, a great advantage of your pipe topology for LF is that you will be
able to pile up as many drivers as you need in order to hit the desired
reference DB level. There is a tricky
thing in it. After you properly damp your pipes (and I do not know how to do it
properly) the LF will be very sensitive to the way how you load the Milq’s
output stage. You want to idle the output stage as much as you can, still without
losing gain and power. More idle = faster transients, more load = more harmonics
and slower decay. Here is what the trick is. You presumably find a
configuration of your drivers and loading and you like sound. You feel that you
need juts + 3dB and adding 2 drivers will give it to you. However, adding 2
drivers will change the impedance of the entire LF section and will require a
new transformer. So, what you might want to do is to your other Lundahl transformers
to fine a proper lodging. Lundahl has very flexible remappable primary and
secondary and you can choose any configuration you want. You can even put
section in opposite polarity to ask as subtraction sections… very very flexible.
You can do some crazy shit like connect all of your LF drivers in parallel,
that will form some kind of sub 1R array and to wind a transformer against it.
So, it will be a pross for you to find a proper loading, until you do it do not
waste money for expensive LF OPT. You can make a large LF transformer with
multiple taps of course but it might be a bit difficult as it will be very little
wire in the transformer and you might not have the best core filling with each
tap. Lundahl from this perspective is superb – each section in there is perfectly
symmetrical and cover all bobbin.
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