Stillpoints LLC Aperture Panels (cherry/cream, 2 available) - REDUCED

For sale is a pair of Stillpoints Aperture Panels in cherry wood and cream fabric.  These are in excellent condition and come with pre-mounted Z- hangars for easy installation.
Asking price is $499 per panel which I prefer to sell as a pair. Includes the original packaging.   Free PayPal and shipping in the USA.  Thanks for looking.    
  
Details about the product: 
 

The Stillpoints Aperture acoustic panels represent a whole new form of acoustical treatment. The Stillpoints Aperture is actually three products in one: an absorber, a diffuser, and a resonator. Due to its revolutionary design, it is impossible to directly compare the performance parameters of the Stillpoints Aperture to a conventional acoustic panel made of fiberglass. The performance specifications of the Stillpoints Aperture continually adapt to the dynamic changes in amplitude and frequency of the audio/video system generating the wave forms within the acoustical environment. At any given amplitude and frequency a “snapshot” measurement of performance could be taken, but, that static measurement does not explain the reality of how the Stillpoints Aperture actually performs.

When using conventional acoustic panels made of typical absorbing materials, there will be only one volume level at which the absorbing material will control the acoustic energy within the room adequately. (This is a static system.) At volumes above that level, you would need more absorption. At volumes below that level you will have too much absorption and the room will sound lifeless, dark, and dull. The Stillpoints Aperture utilizes a blend of absorption materials, and a unique design of internal chambers to trap acoustic energy. The diffusion aspect of the Stillpoints Aperture breaks up the wave forms which will aid mid to high frequency absorption and reduction. The resonator aspect of the Stillpoints Aperture offers control of the lower frequencies only when it’s needed. Thoughtful placement can achieve wonderfully controlled bass frequencies with dynamic lifelike quality and speed. With bass energy controlled, one can enjoy a light, lively, sparkling room of shimmering cymbals and explosive drum attacks, with wonderfully clear midrange and vocals at all amplitude levels.

The Stillpoints Aperture is the only acoustical product that will give you both absorption and diffusion at the first reflection points of a system. And you want both!

- The Stillpoints Aperture have been found effective from 40 HZ to 40K HZ. 
- The Stillpoints Aperture’s unique trapping system captures an area of wave form much broader than its small surface area would suggest. 
- The Stillpoints Aperture can be used to trap waveforms either facing the wall or, facing away from the wall. 
- The Stillpoints Aperture design allows for artwork or photographs of your choice to be inserted in the frame thus raising the aesthetic appeal for everyone in the home. 
- The Stillpoints Aperture effectively increases soundstage width and depth. This is especially true for smaller rooms. (See the Michael Fremer review: Stereophile, Feb 2016.) 
- The Stillpoints Aperture will increase the dimensional perspective of the image structure.
- The Stillpoints Aperture Stands are lightweight and fully adjustable. 
- The Stillpoints Aperture Stand allows for easy Aperture auditioning on location without need for attachment to the wall surface.
- The Stillpoints Aperture Stands allows for close proximity positioning of the Stillpoints Aperture near a loudspeaker to control energy where a wall is not adjacent to the speaker.
(ie: When speakers are not located symmetrically to the room boundaries.) 
- The Stillpoints Aperture Stands allow for up to three Apertures to be hung on each side of the stand if desired.
- The Stillpoints Aperture Stands are very easy to move within a room for tuning vs conventional treatments that must be permanently fixed to a wall or ceiling surface.

The Stillpoints Apertures will not:
1. Decrease or limit the dynamics of the system.
2. Diminish the power of the bass attack. 
3. Unevenly control one frequency over another. (This is often the case with traditional room treatments)

DIMENSIONS: 22" high x 22" wide x 3 1/8" deep 

A few positive reviews:

Absolute sound: http://www.theabsolutesound.com/articles/stillpoints-apertures-acoustic-panels/?page=3 
"The Apertures have an uncanny ability to ‘quieten’ a space and remove boundary effects without excessive damping or any noticeable attenuation of high frequencies. This gives full rein to the dynamics, large and small, and especially to the gorgeous textures of the instruments. :

Hi Fi Plus 
http://www.hifiplus.com/articles/stillpoints-apertures-acoustic-panels/

Stereo Times 
http://v2.stereotimes.com/post/stillpoints-aperture-acoustic-panels/