Metals like steel, copper and iron conduct electricity and are magnetic. These metals interact with electronic components like amplifiers, and cause distortion. Some metals, like aluminum and bronze, are less magnetic and conductive. Quadraspire chooses to only work with these materials because they are less interactive with electronics. In turn, distortion is minimized and sound quality is improved.

Featured on the bottom surface of the Q4 Evo shelf, this scrolled pattern is cut out using CNC machining, and is not visible from the top. Its main role is to further break up resonances and reduce mass, without decreasing strength and rigidity.

Seen extensively in X-Reference, and optional in Q4 Evo and Sunoko Vent racks and wall brackets, bamboo is truly revolutionary material for both its sonic quality and its eco-friendliness. Quadraspire uses a 5-ply solid bamboo stock, of which each ply is laminated at 90 degrees offset from the last. The laminated ply is then kiln-dried to achieve its final color and stabilize it against warping. This arrangement is supremely strong and rigid, and non-resonant because of the fibrous nature of bamboo. In comparison, bamboo is lower in noise, higher in focus and offers sharper transient response than its MDF brethren.

Inserted between the shelf and column, small brass inserts are used to improve the mechanical bond of the two larger components and improves the dissipation of excess energy (resonance). This insert is used in Sunoko Vent and X-Reference racks to great effect.Inserted between the shelf and column, small brass inserts are used to improve the mechanical bond of the two larger components and improves the dissipation of excess energy (resonance). This insert is used in Sunoko Vent and X-Reference racks to great effect.

The concave curves and chamfered edges of the shelves are far more than just beautiful. They decrease mass and increase strength, and the shape itself reduces an effect we call a standing wave. A shelf producing a standing wave is in a way ‘ringing like a bell’. That ring has a very negative affect on the sound of your HiFi system. You can also see the Quadraspire curve on the columns of Sunoko Vent and X-Reference.

Through extensive qualitative testing, Quadraspire has determined that the use of bronze for critical mating points (like spikes) has a very positive impact on sound quality. It’s a given that all materials resonate and transfer energy differently, but some work together better than others. The combination of aluminum and bronze seems to have particular synergy. Bronze is many times denser (and costlier) than aluminum, and acts as a better energy sink, drawing resonances away from the materials they it mated to. Specifically, phosphor bronze has been chosen because it can be used uncoated, which make the benefits even more apparent. The resulting sound in clearer and more coherent, without a brightening of sound that is usually associated with such improvement.