Fan Subwoofer

[Hara]

Have any of you guys checked out the Eminent Technology TRW 17?

http://www.eminent-tech.com/RWbrochure.htm

Seems like an interesting design for an infrasonic subwoofer.

Thoughts?

[Cal Weldon]

Great, now we have something that can reproduce what?

"The amplifier should be capable of operating near its rated power at between 1 and 3 Hz."

Oh well, at least it will keep you cool while you are fuming over the $13K price tag I suppose.

Cal

[DcibeL]

My fan can produce 0Hz!

[Variac]

It is specced as 1hz - 30hz +- 4 dB
I'm not sure it even qualifies as audio, but it might be just the ticket for movie effects...

[sdclc126]

Cost/benefit ratio way out of proportion here, unless someone can figure out how to clone it.

Most subwoofers' response falls off sharply below 20 hz (paraphrased from the website) - so what? Most human hearing does too! And so does most music.

As an HT sub it would be useful for creating vibrations, etc., but is that low freq information going to be in any recordings?

As primarily a music person, this thing is useless to me, and the price tag will lend itself only to those with money to burn. I don't think there are many of those on this forum.

My cynical 2 cents.

[Hara]

Cost/benefit ratio way out of proportion here, unless someone can figure out how to clone it.

Thats what I want to know. If you check how it works, all it does is run the fan at a constant speed, and the driver just changes the angle of the blades thereby creating pressure waves. I'm sure theres a lot of tuning involved but can't a cheap concept model be made?

[sdclc126]

Originally posted by Hara


Thats what I want to know. If you check how it works, all it does is run the fan at a constant speed, and the driver just changes the angle of the blades thereby creating pressure waves. I'm sure theres a lot of tuning involved but can't a cheap concept model be made?

There has to be a fairly sophisticated mechanism to vary the pitch of the fan blades - similar to what a helicopter does.

The real question as far as I'm concerned is - who would really want this thing? Is it THAT big of a neato gadget? Is it worth anywhere near the price? A big fat no, I say. But if a cheap clone could be figured out, and it was for HT pretty much exclusively, AND if there was any recorded info in it's operating range, go for it I guess.

And don't forget to post the plans.

[BassAwdyO]

the concept is rather simple... construction would not be

[johnnyx]

It's an interesting idea, but all the fans I know of that move lots of air quickly are noisy. How do they get round the wind noise problem?

[Cal Weldon]

quote:

"We can now listen to never heard before very low frequencie sounds."

Now class, how many mistakes do you see in this sentence?