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I posted an experiment to enforce the panel in order to improve the dynamics besides rigid stand a while ago. Here is the finished modification. I made two bars and placed them one about 2 feet from the top and another one about same distance from the bottom.
The result is much improved dynamics.
I think this modification may work best for large panels, such as 3.6 and over (donít do this modification on 3.5 and other models which have perforated metal sheet on the front). It seems to me that the thickness of perforated metal sheet is same for all Magneplan speakers. Therefore, the larger the panel, the bigger improvement. These drywall screws act as spikes to support the panel. If you want to make such modification by yourself, you need to be careful not to tight the screws too much. Once you feel slight pressure, you should stop. Donít push panel too much.
It isnít difficult to do this modification at all. And, the modification is revisable. If one day I want to sell my 20 for a pair of Apogee Diva (I have been dreaming of owning a pair for long time), I can easily put every thing back as original without leaving any permanent damage on the speakers.
There improvements are basically dynamics. The sound is faster and decay is shorter now. As we all know, Maggies has soft midrange and long decay. Since the decay is a bit too long, dynamics sounds compressed. This modification also reduces the vibrations of perforated metal sheet. Those vibrations cause less precise placements of instruments. However, the placements may be too precise for some of people after adding this modification.
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