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In the Forum: Audio Discussions
In the Thread: Romy The Cat's new Listening Room
Post Subject: To feed the leeches?Posted by Romy the Cat on: 10/7/2010
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 Serge wrote:
I will think about it. Romy, of course you know me. Use your little grey cells as Msr Poirot used to say.
Initial thoughts: hunting HF reflections and damping them is generally not a good idea. It is like making a speaker cabinet completely damped - the life in the sound goes away with the resonances. There should be reflections, but random and low in amplitude. So to begin with let's think not how to make the room absorb HF but how to make it scatter them in a good manner. Quite unexpectedly wooden things are most effective there and not man made stuff.
Probably you need to wait till the finishing is finished and furniture is there.
And again: in no way I am giving advice, I'd rather see a discussion.

Serge, it will be no furniture in my listening room. I do completely agree that hunting HF reflections and damping them is generally not a good idea but it does not describe a full picture. Yes, the reflections shall be random low in amplitude, everyone agree with it but a full picture in my view is not find an optimum balance between harmonic absorption and  random reflection but to do it while maintaining the listening room as acceptable living environment.  My listening room is a main leaving room of my house; in fact it has a feeling of a large loft with kitchen and other rooms connected to it. So, doing all those room treatments I need to make sure that I will not convert the room into some kind of interrogation chamber, as most of dedicated audio rooms feels like.

At this point room is very bright and before I introduce randomization of reflection at MF I need to eat a lot of HF. Sure, I will be watchful do not over-damp the room but with the space like this and the ceiling like this it will be hard to over-damp. I do have a very clear idea what I would like to do in the room, in fact all materials that I need I have bough and they are sitting in next room, waiting to be placed. I will be posting information about me next steps and the results I got.

The only thing that I do not have is some kind of stand alone, mid room HF eater that I would like to place between speakers and the back wall’s windows, something like tube traps or the similar. I do not like the tube traps but they are less ugly than any other similar treatment. Also, tube traps are ridiculously expensive. I need 12”-15” wide and 8-9 feet long. The tube traps of these dimensions are around $2.5K. Sorry, but this is just a piece of fabric covering a fiberglass pipe. The fiberglass pipes everyone buy from the same Knauf factory and it costs virtually nothing. The piece of fabric starch above it is also cost a few dollars, so why the $2.5K price tag? Because the dealers who sell all this crap need to pay their mortgagees? I do not know, to feed those leeches does not sound too attractive to me.

The Cat

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