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In the Forum: Audio Discussions
In the Thread: Romy The Cat's new Listening Room
Post Subject: Interpreting the LF results.Posted by Romy the Cat on: 5/12/2010
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 Romy the Cat wrote: |
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Ok, here are some thoughts that I have after the last night experiments. The tests were made with Sunfire subwoofer, wiath is bad sounding machine but excellent LF test source. The Sunfire slope wary from 3rd order at 100Hz to 4th order at 40Hz. They claim that it is not a full 4 order but 22dB per octave but care less about the specific and HOW they did it. It looks like 3-4 order would be fine. I will be trying to go for second order but do not know at this point how much “help” my future midbass section would need at 63Hz.
It looks like everything suggests that I would need to get rid in my new room my LF line arrays and go for smaller dedicated ULF sections, made to fit to the specific of the given room. Here was what I predicted years back that it will be the next manifestation of my playback. If I go for this direction now I need to well define the shape and the location of individual left and right ULF box as they will be different shape. If I go there that I will have a separates thread bout the construction of the ULF boxes.
From my measurements I am a bit puzzled the roll of at 28Hz. It is very possible that Sunfire sub dies at 28Hz and my microphone is calibrate to much lower level and the RTA is flat to a few Hz. I will retest it with different mic and different analyzer and will see what happen. Anyhow, if instead of Sunfire it will be a big ass driver I do not see why it would not go to much lower level, particularly that with open bottom I my always LCR it.
So, I would need a pair of boxes. A direct-coupled and properly sounding in bass SS amp of I would say 300-500W. An ability to stick my 3-4 order filters in the amp. I would also need a decision about the drivers that I will be using. That is a lot of things to do. I would like also to try my arrays with 4 order filters and LCR resonating chains. I will do it sometime this week.
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