Working out how to choose the correct speaker for the room you are going to be using it in involves many factors. All of these factors must be considered when selecting a loudspeaker for your listening room. We are just referring to two channel sound sound with a left and right channel speaker. We need to consider low frequency driver diameter, total speaker size and amplifier.
The size of the low frequency driver must be “matched” to the room volume. Why room volume? Because room volume or in this case, lack of room volume, is critical to the pressure created by the diameter. In other words, you must match the volume of the room to the woofer diameter. A 10″ woofer will produce a certain amount of energy into the room. A 12″ woofer will produce proportionally more sound energy into the room. A 15″ even more. Where can all of this low frequency pressure go but into a room with a certain volume. If the volume of the room, or its ability to handle low frequency pressure amounts, is too small you will receive all types of low frequency issues. With excess, low frequency energy into the room your middle and high frequencies will be blurred if you are lucky or smothered which is usually the case.