DOGMA 600 MonoBlock Power Amplifier -Design-

With the DOGMA 600, we conducted repeated listening evaluation tests while imagining the vibration mode when the aluminum panel is incorporated with the iron base plate into a square enclosure, and conducted field tests to find visual excellence. As a result, we arrived at the current design, a combination of aluminum, iron and stainless steel. For example, a precise, low center of gravity timbre is now obtained as a result of using insulators cut off from stainless steel materials.

The four main panels that comprise the main unit are made of 10 mm thick aluminum (left and right side panels designed in an arc) which is then carefully alumite-processed in Japan. The four columns at the corners that support the enclosure panel have been cut and machined from 40 mm square aluminum blocks and hairline-processed. As a result, they function as a predominant design feature of the DOGMA 600. From the aspect of cost, these would generally be L-shaped angles made as structural columns that comprise a combination of interior and exterior materials.

Nevertheless, on this equipment we have cut out and machined L-shaped columns from aluminum blocks for two reasons. The first reason was to eliminate internal loss of materials and variance in mass. The second was to ensure that mechanical stress energy is uniformly dispersed when the product is assembled. As a result, not only is sound expressed faithfully but also the quality of the exterior is guaranteed as an integral part of this high-end audio equipment.

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One more feature of the DOGMA 600’s interior structure is how the transformers and heat sinks are fixed in place. These are secured by a 6 mm thick iron base plate and four gold-plated 20 mm brass square pillars.

Gold plating of the brass square pillars was not chosen for the purpose of design.
During the process of repeated trial production and trial listening, it became clear that gold-plated brass square pillars would react better to sound rather than processing to prevent oxidation over time. For this reason, we finally plated the pillars with 1 micron thick gold, which was regarded to be the maximum thickness, because changes to timbre would become apparent depending on the thickness of the plated gold and plating method. This also led to an increase in the unit cost of parts.
However, that difference in timbre has proved to be extremely irreplaceable, so we adopted this as an integral basic part of the DOGMA 600 internal structure.

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