Our famous Multi-Element Granite Platforms:

The approach is simple and well executed. With just three basic material layers it is easy for us to optimize the performance and eliminate the "muddy" effect that occurs when too many layers are used in a constrained layer system. After all, if you need more than three layers, then you're probably doing something wrong in the first place.

Independent of component weight - whether it's a massive 300 pound amplifier, or a sensitive phono stage, the results are satisfying and predictable! Plus, they are tolerant to a wide range of after-market coupling devices - allowing you to "tweak" your system any way you like it.

Learn more about our Multi-Element Platforms.

The Frame Assembly:

Floor born vibration takes on many forms. A common misconception is that the majority of skip-inducing vibration is caused by vertical vibration. This would be true if you place your turntable in the center of your room. In the real world, however, we normally place the table closer to a wall. Flexing of the floor tends to occur less near the wall, and increases as you approach the center of the room. The top of the audio rack heaves and sways in an angular motion in response to any flexing at the center of the floor. This type of motion is difficult to isolate and is certainly beyond the ability of simple isolation absorbing devices like sorbothane pads and even complex ball-bearing systems.

Isolating real-world multi-plane motion requires a different approach.

Dynamic multi-plane isolation

At first glance this audio rack appears much like any other design. But if you take a closer look, you will see that this design uses a "frame within a frame", each of which being fully isolated from the other. When analyzing this design, it would appear that the inner frame "floats" within a stationary outer frame. This seems logical since the outer frame makes contact with the floor and is quite ridged. But, in actuality, the inner frame remains stationary, do to inertia, while the outer frame is allowed to "float", as it tracks floor-born distortion and vibration.

The Frame within a frame:

Shown separately, for illustration purposes, this audio rack design uses two fully independent frame assemblies. The inner frame assembly operates as a counter-balance system for the upper platform.

The outer frame assembly tracks floor motion while providing a foundation for the main audio components. The lower platforms are isolated from the main audio rack through conventional, but sufficient means. .

The pivoting top-frame assembly:

The central pivot yoke incorporates a tungsten carbide ball sand-witched between two concave, surface-hardened races. This allows the top frame to maintain a level plane, even as the listening room floor sags and flexes. A considerable amount of horizontal deflection is also absorbed by the central pivot yoke.

Motion in the vertical direction is absorbed by the frames them self. The geometry of the alloy steel frames operate much like a well-damped spring suspension system. This would never be possible if the cross members had been made of aluminum. Aluminum cross-beams would simply buckle under the enormous pressure exerted at the central pivot point.

The ballast weights:

The ballast frame assembly accommodates up to 120 pounds of Olympic-size barbell weight plates. The weights are neatly tucked away and are not visible from the front of the audio rack. The cost of the weights are not included in the cost of the rack. We sell the weights at a competitive price, however you can save on shipping costs by purchasing the weights locally at sporting goods stores as well as Sears or Walmart for about a dollar per pound. The amount of ballast weight needed will be at least 75 percent of the weight of your turntable for best results. If 120 pounds is not enough, let us know and we will provide custom weight plates for an additional charge.

The Columns:

These massive , nearly 4.5 inch diameter columns weigh in at almost two pounds per linear foot.The precision extruded aluminum columns offer a much better cosmetic appearance, than the more common industrial extrusion typically used in the manufacture of machinery frames. Aluminum is a good choice for audio rack columns since it transmits vibration energy quite well down it's longitudinal axis, where it is easily drained by your floor.

The Footers:

The primary function of spiking is to focus the weight of the rack onto an infinitely small surface area, although some floor finishes make the use of such devices impractical. Therefore, we offer optional floor discs, as well as glides and casters.

Shipping weight 180 lbs. (3-shelf version)

Load capacity: 300 pounds per shelf

Overall Dimensions: Width 27.5", Depth 22", height 36" (other heights available)

Platform size: Includes two Standard 18"x18" and one super size 21"x27"

Maximum component size: Lower shelves: 19.5" wide, 24" deep

Maximum component size: Turntable top shelf: 27" wide, 21" deep

Shelf spacing: Infinitely adjustable

• Reference Series

  

• Signature Series

  

• Modular Series

  

• Tweaks and DIY Parts

  

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