This should be remembered when replacing a woofer in such an enclosure. Best results can be expected when using woofers with a QTS between .30 to .90. These speakers offer good control, low Distortion and high power handling. The Efficiency or Sensitivity rating indicates how effectively a speaker converts electrical power from the amplifier into sound pressure. This is frequently related to larger magnet sizes, larger voice coil diameters, and more compliant suspensions.
Optimized enclosures are essential in achieving maximum sensitivity, overall.
The higher the Decibel number, the more efficient the speaker and the louder it will play with the same input power. While usually more expensive, an efficient speaker helps maximize the potential of the available power. A typical separates system includes a separate woofer, tweeter, and external Crossover , all of which are designed to work smoothly with one another. Separate woofers may be easier to mount in tight places because tweeter protrusion is not a factor. Separate tweeters allow positioning for optimum imaging.