Multi-driver configurations can be found in large speakers that are around 105 to 120 centimeters tall. The higher power handling of well over 100 watts and the lower lower frequency limit that come with them require more powerful amplifiers to reproduce their quality.
The bass reflex design has emerged from a variety of construction options for a standard speaker. Due to the cabinet size, this design has a greater effect with a freestanding speaker than with a bookshelf speaker. The reproduction of low frequencies is additionally enhanced by the reflection of sound waves off the floor and walls, especially in room corners. However, a distance of around one meter should be maintained. The bass reflex port is usually located on the back of the cabinet. This distance prevents the bass from booming and preserves the free development of especially the middle tones.
A very slim design of bass reflex speakers uses side-firing bass drivers and comparatively small mid-woofers. Their placement requires a bit more finesse and is particularly suitable for "Classical". For more "oomph", you need larger or more bass speakers.
