In some instances, multiple small drivers can actually outperform a single, large driver. The following system relationships can help you to decide whether to use a few large drivers or many small ones. From these equations you can determine the best method for your installation. The cost of different drivers varies dramatically, as does their quality. Shop for efficiency in your driver.
Efficiency is rated two ways.
The first is half-space reference efficiency, which is stated as a percentage. In both instances, higher numbers are better. Efficiency is related to several factors. The mass of the cone will drastically affect efficiency. Tripling the cone mass reduces the acoustic output by one half.