Using the Quam Speaker Coverage Calculator

Speaker Coverage Calculator

This app is designed to provide an estimated edge-to-edge speaker coverage pattern. It is intended for estimation purposes only and should be used as a guideline when estimating the number of required speakers. There are many other factors that should be considered when determining the required number of speakers for a particular room.   

Length: Enter the length of the room in feet

Width: Enter the width of the room in feet

Seated or Standing: Select either seated or standing listening height. Seated height is 3.5 ft. and standing height is 5 ft.  When selected, the choice will be dark blue in color.

Ceiling: Enter the ceiling height in feet. The calculation has a maximum ceiling height of 16 feet.  

Speaker Model: Select the speaker model series by tapping the model number. By tapping the model number, a page of speaker series will open. Tap on the model number series. When selected, the model will turn yellow in color.  Tapping the information button will open a summary specification page. From this page, a Web Link to the Quam website product page can be opened.

Transformer Tap Settings: The transformer tap settings will be displayed below the Speaker Model. The selected tap setting will be dark blue. The tap selection is used to calculate the maximum direct field dB-SPL level shown at the bottom of the page.

Speaker Layout Data Results


Edge-to-Edge: The calculation is based on an Edge-to-Edge speaker coverage pattern. Some critical listening application may require more speakers to achieve center to Center.

Number of Speakers: The calculation for the number of speakers placed the length and width of the room.

Corner Starting Position: This is the staring point from the corner of the room from the wall.

Spacing on Centers: From the corner staring position, speaker will be placed on the length and width axis this far apart.  This calculation is rounded to the nearest 2 feet to account for ceiling tiles grid layout.

Total Number of Speakers: this is the calculation of the number of speakers for the length of the room multiplied by the number of speakers for the width of the room.

Max Direct Field SPL: This is the calculation of the coverage pattern, transformer tap setting, and the sensitivity of the selected speakers.

Info: Defines the input fields and output data.

Email button: Calculated data results may be emailed.


Quam Nichols Company makes no guarantees nor implies the accuracy of this app. Each room has its own variables that must be taken into account on a case by case basis. Detailed room design beyond the capabilities of this app is not available.