made of magnesium under board

“All-Magnesium Underboard”(model number size price etc See price list)
Material and Structure: It consists of 4mm and 3mm thick pure magnesium plates with a 1mm damping material and electromagnetic wave absorption material sandwiched in between, resulting in a total thickness of 8mm.
This is an upgraded version of the underboard for Sunshine components. The key feature is that it is made entirely of magnesium. All-magnesium underboards can only be found at Sunshine and guarantee the highest performance in the world, regardless of price. If you have the budget, we recommend this over the E series.
In terms of effectiveness, the improvement in sound quality achieved by the underboard is unparalleled. It can be considered a truly outstanding product in terms of its effects.