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In the Forum: Audio Discussions
In the Thread: The ULF cannel for my new listening room.
Post Subject: Nope, not time aligned.Posted by Romy the Cat on: 9/7/2018
That was a subject of long consideration for me and I ruled not to go for time alignment. You see, my current listening position is 8.5 feet from the diaphragms and my ceiling height is 14 foot. Let pretend that I am siting at 4 feet at my listening chair then it still not enough distance to get a true time alignment. There are more complications then this. I have 100 inches ceiling fan above me that I would like to keep, I would like do not have IB exit juts above me, I would like the IB exists were separated between R and L channels, I would like the IB exists were not in the middle of the room but rather closer to walls and to be loaded to the walls. And there is another huge reason: above the ceiling in the attic I have a LOT of things going on. I that’s the exhaust pipes from bathroom fans, I have center HVAC in there, lightings, security and a few other systems are running in there and my carpenter spent a LOT of time to reposition the thing and to clear the space for two manifolds. So, we end up with 2 locations that are a good compromise to the are equidistant from my listening position and to be visually agreeable in the room (my listening position is not symmetrical in the room). So, it is not time aligned. I am planning to cross it at 20Hz and it will be indirect hitting my listening position, if we can call “indirect” about pressure wave propagation… 
 
So, in a way it is a compromise and “a bad design” to begin with but it is what it is. When I divorce my wife and built my next house explicitly for listening pleasure then I will factor the time alignment of IB into the room design but for now it will be as is. I wonder if I will be able to get from IB the overall quality of the sound I was able to get from the system with midbass horn. I know that IB and midbass horn are different animals but I am taking about the overall Sound….

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