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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo 3.0
Post Subject: Do not fight your room, embrace it.Posted by Romy the Cat on: 6/25/2023
Anthony
As you can see in the picture it is one Vitavox 15" per
side and the box is about 2 feet deep, so it good volume. I drive it from low
frequency Milq channel that has a line-level 63 Hertz filter. Subjectively I
feel that I would like to roll off the Vitavox driver slightly faster. I do not
want to open the amplifiers and change filter as it is has all complexity, as a
filter is integrated with the driver stage bias. I will probably put another
first level filter at speaker level, at least initially. The key is, in my view,
to find a sweet spot where tonally and dynamically upper knee off Vitavox
15" compete with lower knee of upper base horn, and to find which channel
performs best in the octave between 70 and 140 cycles. I do not know the answer
yet, I knew it before but then Vitavox in much smaller box, so I need to do all
those experiments all over again. Ideally, when I find the answer, I would
change it in the driver stage tube of Melquiades as in my view nothing could be
better then to do it line level.
I do not know your room, but I do not believe in acoustic
treatment for low frequency, unless you do monumental architectural changes in
your room. The existing acoustic
treatments do very unproportional treatment as very effective and a higher
frequency. So, when you use them to treat your 100 Hertz they make
reverberation time at 1000 cycles much shorter than you would like it to be as
they're much more effective at higher frequencies. So, for 10% of correction 100
Hertz you create 300% damage at 1kHz. To treat some corners, VERY moderately it
still might be OK but it is about it. My approach to dealing with the problem
like this is very different and I I have written a lot about it. If you have a huge
cancellation at 60hz-100hz, then introduce a dedicated mid bus channel where
you will be able to play with crossovers, slope and phase your we'll be able to
fix this room problem. If you read my Macondo’s axioms then you will see that I
always advocate tonight fight acoustic problems in the room by use them. Find
out the way to use your cancellation at 60hz-100hz for your advantage.Rerurn to Romy the Cat's Site