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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.
Post Subject: This morning I woke up hornyPosted by Romy the Cat on: 11/14/2010
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 Romy the Cat wrote:
Anyhow, I did the measurements today and what I saw shocked me. Of the ULF sections has nice 20Hz at MF level then they have +12dB at 60Hz level. That explains everything but it also absolutely clearly indicates that the selected location must not be used for ULF. That sucks as I have no other space in the room that can accommodate 80sq feet of sealed enclosure without ruining the room feel. Well, I need to find another solution; this is what I will be concentrated upon.
Not particularly most of the people do but becomes my mind was wrongly stimulated by the aim to find a new location for ULF channel ands it what I was intending to do this morning. I connected my text ULF devise- the Sunfire Cube subwoofer, the measurement instrument was sitting in the room since yesterday and I began to search the better location.
The biggest obstacle is 60Hz huge peak that I have if I inject 30Hz into the room. The peak is there and it mostly come from the rotunda addition to the room on the right, I do not know how to call it and I call it the equipment bay. It looks like the peak not there if the ULF is on the left side of the room but there is no space in there for large boxes.

I was trying to hide the ULF in different rooms, taking advantage that the house has open floor plan- it did not help – the 60Hz large peak cam each time when the ULD is coming from back. I was pouting the ULF in the basement and was firing it through the floor. It was not good. I lost 40dB-45dB at sub 30Hz and the overtones were all over the sub 150Hz.  Also, the damn house felt as it was about to collapse – those houses are not built to handle this LF stress…

Anyhow, I need to come up with something different. The infinite baffle on the left side of the room, opposite to the equipment bay would be interesting but I know little about infinite baffle. It would need to beef up the roof to do it and I am not doing it as experiment and without knowing the result.

The Cat

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