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Acoustic Revive QR-8

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Product Description

Acoustic Revive QR-8

Quartz Resonators for Placement On Equipment, and in your Room


Believe it or not, I am skeptical of things like this, that is why it has taken me so long to bring the QR-8 quartz resonating discs to the Tweek Geek lineup of products. I had not had much success using them until recently. I found that they need mechanical vibration, magnetic, or electrical energy to really show what they can do. What I have found is the following:

  • Place near iec inlets or on top of transformers. They will use the electromagnetic energy generated by the transformer or around the connection to activate.
  • Place near dome tweeters. They will make use of the magnetic field around the driver to activate.
  • Place one inside the horn of a horn loaded speaker. On the midrange, and high frequency drivers, inside the throat of the horn, close to the driver. They use the magnetic field presented by the driver to energize and work their magic. 
  • Place on windows to reduce glare and negative sonic effects of glass.
  • Place on the rear wall (behind the speakers) one centered, one near each corner of the wall about 5-6 feet off of the ground.

"I decided on my loudspeakers first: one went in the bottom of the port, one on the super-tweeter mount, two on the tweeter mount and two on the midrange/woofer mount of each Harbeth Super HL5. Somewhat contrary to my expectation, I heard a difference: the sound took on a subtly more natural, less electronic overall character, with tone that was subtly deeper and note decay that trailed off longer. All in all this was a worthwhile though subtle improvement and the little QR-8 disks are staying on the Harbeths" Sixmoons

Using the QR-8

How to use on audio components
    Place the one QR-8 on the center of each part.   If there is not enough strength or hardness, it is effective to place on five places like shown above. Also, if you are placing it on the rear panel, it is effective if you place it near the power supply inlet or input/output terminals.
How to use it on speakers

The front
   My preferred placement above  
The back

Placing on center, four corners, unit frame or unit will have an effect. The sweet spot and where you place the QR-8 depends each speakers, so listen to the effect and find the sweet spot for your speakers.
Also you may experience a big effect if you place it on the magnet of speaker unit or the frame.

How to use it on the room or door.

    At first, place one QR-8 on each center of wall, ceiling or floor.   If there is not enough strength or hardness, place six to nine of QR-8 like shown in the diagram.
Also you may experience an effect by placing on the back of the speakers, surrounding the speakers with QR-8 or placing on the same height as the unit.
Door and window    
    At first, place each on the center of door or window.   If there is not enough strength or hardness, placing five places can be effective.

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