GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.

Post Subject: Pitching pitchPosted by jessie.dazzle on: 9/21/2010

Romy wrote:

"...What kind outer suspension it has, is it rubber?..."

Correct (I know I know...)

"...I think the key factor would be the degree to which the driver is able to decimate the LF pitches..."

Pitch: The property of sound that varies with variation in the frequency of vibration.... I decided to look it up and double check my understanding of the word.

On the first day I received the drivers, I set them face-up in their packing tubes (a sort of small improvised rear chamber) and let them play full-range. Yes they were polluting the mids and highs coming from the rest of the system, but I was sucked in by something I had only ever heard in mid and upper-bass.

I grew up around old tubed electronics driving paper cones. Until building this system, certain qualities of mid and upper-bass existed only as a memory; one I found more true to life and pleasant, and one I did not forget. These massive drivers were making sound that had this quality, though lower down the scale; this is something I had never heard from home audio. I don't know what to call it (tone+dynamics+nonaggressiveness), but it is what I heard from the AK drivers as well, and it is what motivated me to build the 40Hz horns.

People have grown accustomed to abbreviated LF, delivered via shorthand or code, which then must be decoded as bass. It is analogous to a mode of delivery that relies on squirting under high pressure to get the job done; exactly like electricity delivered as high voltage (high SPL), versus flooding via high current (high spatial capacity).

There's something in bass that makes people feel physically good; even the high-pressure, abbreviated bass has this effect in the short term, but I find the human body is much more responsive to bass delivered in copious, flooding longhand, especially over extended periods. This is the case regardless of the type of music (including bass-centric synthesized electro).

Once in the large enclosures, they made my old ported subs sound like they had a cold.

"...I am bit skeptical for use basement as a rear chamber in my case. My floor is suspended and I do not want any bone vibration take palace when ULF is working. This is why I am trying to put my ULF in another room that does not share the same suspended floor as my listening room...The only viable use of basement, at least in my case would be if I make woofer sitting in some kind of sealed pipe that goes from basemen floor to basemen ceiling and exhaust into the listening room, but decoupled from the listening room’s floor. I am contemplating it but cutting two 20 holes in listening room floor would require me to be absolutely confident that it is what I want..."

That's what I was expecting you'd say, and what I was expecting to have to do.

"...BTW, in which part of US are you planning to return?..."

To Southeast Michigan (a suburb north of Detroit); you know, a crisis is a terrible thing to waste!

jd*

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