"That's not a woofer, THIS is a woofer"

[Sheldon]

http://www.royaldevice.com/custom3.htm


Got this from the DIY speakers list. May have shown up here before, but it speaks to commitment (or the need to be committed).

Sheldon

[thylantyr]

This shows up yearly on the forums..

It's kinda small isn't it

[Tensop]

The sad thing is that something bigger has probably been jammed into a car for an SPL Competition somehow

[tiroth]

What really scares me is how dreadful the room looked after all that effort and money. You would think that aesthetics would at least be considered...especially after laying out so many $$$ for the marble.

[tpenguin]

Those cwazy tube people . It's quite an impressive accomplishment, if a little on the extreme side. I wouldn't mind a refrigerator-sized sub enclosure, but I'm affraid I'd have to draw the line at building an addition onto my house to put woofers in. But then again, whatever floats your boat...

[roddyama]

Originally posted by tpenguin
..., but I'm affraid I'd have to draw the line at building an addition onto my house to put woofers in.

An addition is not required. You only need to convince your wife to do the laundry in the sub's compression chamber. Wash in the left and dry in the right.

[RHosch]

I've perused that site numerous times, and something about it just strikes a raw nerve. And it isn't even their obsession with NO FEEDBACK designs. It's the 20 speakers used for the L/R channels (not including subwoofers, apparently). They look like some form of back horn loading or transmission line. With the description of "no crossovers" used at the top of the page, I can only assume that the drivers you can see (around 10" or so it appears) are running full range.

Great... if you have one of them. I mean, really... the whole purpose of running a full range driver is to avoid phase distortion through a crossover region, but equally important, IMO, is that you avoid having multiple spaced drivers with the associated comb filtering. If you really need more SPL, use two, but by all means keep them as close as possible.

Take a look at the spacing of drivers in that wall of front speakers. The in-room lobing error must be phenomenal (phenomenally bad). I don't care how low the distortion from each speaker is (not very after cone breakup sets in), or how flat (not very, if those suckers are running full range) each speaker is... the resulting frequency response vs. position must look like a plot of a bed of nails. Geez... And that represents the "most esoteric" listening room in the world? They can keep it.

Nice subs though.

[Da5id4Vz]

An addition is not required. You only need to convince your wife to do the laundry in the sub's compression chamber. Wash in the left and dry in the right.

So, if you continue to increase the amplitude, can cavitation be achieved as in an ultrasonic cleaner? Would this then be a subsonic cleaner? If cavitation cant be had, a LF sweep and traveling waves would certainly get the suds going.

Perhaps the sub becomes the washing machine.

(capitation? spell check is dangerous to the inept)

[tpenguin]

Originally posted by RHosch
I've perused that site numerous times, and something about it just strikes a raw nerve. And it isn't even their obsession with NO FEEDBACK designs. It's the 20 speakers used for the L/R channels (not including subwoofers, apparently).

While I think the walls of speakers (and trying to run 10" drivers all the way from the bottom of their frequency range to the top octave) are really dumb ideas. The "abosolutely no feedback" philosophy is abosolutely stupid. In addition to the fact that the amps will generate an obscene ammount of distortion regardless of how low the distortion generated by the speakers is, having absolutely no DC offset correction means that a single screw-up with a connection or even a nearby lightning strike could cause all 24 (at least what I counted) of their drivers to go flying out of their baskets. Efficiency is good, but just trying to make as much noise as possible out of a tiny tube amp is just not the way to go. As for their listening room being esoteric, that is only because most audio people would not be caught dead with all that crap (maybe with the exception of the sub) in their listening rooms.

If they think getting 100dB from 1W is so great, why don't they just listen to smoke detector piezo buzzers?

[JOE DIRT®]

does that come in a kit?