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Mr. Maciag is an audiophile from Florida whose purchase of an XTZ Room Analyzer II Pro stimulated his interest in room acoustics and the pursuit of a room free from acoustical problems.
The audiophile listening room which Mr. Maciag had allocated was a challenging space to work with, having openings on both side walls and a peaked ceiling.
The high end audio system installed included Magico S7 speakers, a D'Agostino Momentum integrated amplifier and PS Audio Directstream DAC.
The room turned out very well visually, with the use of painted Omnifussors and BAD panels color matched to the walls and ceiling.
Acoustically, the post-install measurements were much better, but the 40Hz resonance lingered on more than optimal.
Our initial root cause analysis for the 40Hz resonance focused on the 1st axial length mode, hence the front wall placement for the two Type 2 Modex Plates. After installing all the panels, we instructed the client to re-measure the room, by sweeping it with a 40Hz sine wave and locating the area of highest SPLs. It turns out that there was a secondary resonance related to the dimension between the front wall and the corner next to the listening position. Movement of a single Type 2 from the front wall to this corner resulted in a 4dB reduction in the strength of the 40Hz resonance!
After discussing the result with the client, it was determined that an additional two Modex Plate Type 2s would be added in this corner. Unfortunately the existing design is too high for two to be stacked in this corner, but a "v2" is in development with different dimensions that will allow a dual stack. The "problem" corner with the built in bookshelf at the back right side of the room. Future plans are a dual-stack of the v2 RPG Modex Plate Type 2s to further reduce the severity of the 40Hz resonance[/caption]
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"The end result is nothing short of spectacular." David W.
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Nyal Mellor, Founder, Acoustic Frontiers
Nyal Mellor
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