How can such little cones provide any bass, even with the equalizer?
It is true that these 3-1/2 drivers are very small compared to the 12 or 15 woofers that you are used to seeing in a system having good bass capability. You might think of the IDS-25 as a woofer made of 25 individual diaphragms all working together. Each one has an effective cone area of only 5.7 square inches. However, when combined together, the effective cone area of 142.5 square inches is equal to that of a sixteen-inch woofer and they couple to the surrounding air very nicely. The equalizer then provides the means to achieve a smooth and extended response for the deepest bass. The large effective cone area of the IDS-25 not only delivers excellent bass but also effortless sound through the rest of the audio range and fills the room from top to bottom.
