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A Look Inside Invisible Speakers
Bring your walls to life with invisible speakers. And best of all, they fit with any style.
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An Onsia In-Wall Sound Panel
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July 01, 2008 | by Dennis Burger

The Direct Approach
At this point, there must be a few of you wondering, “If these fellows are just sticking transducers on little miniature walls that I then imbed in my normal-sized wall, why not just stick the transducers on the wall itself?” If not, shame on you. You should have thought it by now. But even if you did, Induction Dynamics and Séura already beat you to it with their SolidDrive and Lucidity Invisible Speakers, respectively. 

The Lucidity Invisible Speaker consists of 4.19-in. by 3.31-in. cylindrical transducer that adheres to the backside of your drywall, creating a massive vibrating surface that promises 20Hz to 20KHz frequency response and 150 watts of power handling capacity. 

“But what about me?” I hear you saying, “I live in a glass house and therefore have no drywall to vibrate.”

“Ah ha!” says Induction Dynamics, “We’ll be coming ‘round to your place come bath time.” Actually, no, they say, “Ah ha! We have an invisible speaker solution for you.” Actually, they probably don’t say “Ah ha!” because, honestly, who says “Ah ha!” anymore? Sounds a little mustache-twirly, does it? But that last bit still applies.

The company’s SolidDrive line of transducers is designed for a wide variety of surfaces. Each has a frequency response of 60Hz to 15KHz (depending on the surface) and can handle 100 watts of power. The SD1, with its cantilevered spring bracket, is designed to be mounted between studs to traditional walls or ceilings. The SD1sm, meanwhile, is specifically tailored to wood and other porous surfaces—beneath hardwood floors, for example. And the SD1g is meant to be used horizontally or vertically on glass and other non-porous surfaces. So you in your glass houses can listen to all the Stones you want, although we still recommend against throwing them. Especially Keef; he’s looking a bit fragile these days. 

In conclusion, we at Electronic House have only one request: no matter which invisible speaker solution you choose, once your walls actually can talk, please find yourself a credulous friend (shouldn’t be too hard) and stand him next to your wall while you play a recording of your spookiest-voiced friend whispering “Get out!” Upload the results to YouTube, send us a link and you’ll be our hero forever.

For more on hidden speakers, check out “10 Speakers to Be Heard, Not Seen.”



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Comments (4) Most recent displayed first.
Posted by Keith vanderkley  on  11/16/09  at  02:16 PM

Without prejudice, according to our records neither T. Bradford nor R.Miller are Amina Cerified Dealer and as such I find it hard to believe either have ever installed, or heard the Amina Plaster-in-wall speakers, which would limit their opinion and make their comments very subjective. Since our product is mentioned in the article, if either would like to draw a more educated conclusions I would love for them to invite one of our reps to do a side-by side demonstartion of our produc, and listen to such things as intelligibility, dispersion, off-axis response, and timbre at low, mid and high-volume. It will certainly broaden the appreciation of the difference between produt that is engineered for a specific function, rather than taking existing technology and forcing it to do something it was not designed for. Please feel free to contact me at the e-mail address provided to arrange for the demonstartion or comment.

Posted by Todd Bradford  on  02/27/09  at  02:24 PM

I have sold and installed many pairs of stealth Acoustics as well as some of the others, and I can definitely say that there is no comparing them.  Stealth Acoustics are just like a “normal” in wall speaker, except they are completely invisible.  They look Amazing (meaning you can’t see them at all) and they sound great.  I have set up surround sound systems in family rooms with the invisible subs and speakers,  and the effect of an invisible sound system is awesome.

Posted by Ray Miller  on  07/02/08  at  03:07 PM

The Stealth AX-3’s are simply in a whole other class of product. The only thing they have in common with the other products metioned here is that they are invisible. As for the performance and sound quality, they are not to be compared with other “invisible” products, but should be compared to a “Real” pair of traditional high-quality boxed speakers - they are that good! The AX-3 obliterates the other products metioned here in terms of shear sound quality by a very large margin.

Posted by Steve Olszewski  on  07/01/08  at  04:29 PM

Stealth Invisible speakers definately add that warmth lacking in other invisible speakers. I have them in my house with the subs..Invisibility rocks!



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