Ryan,
The Audioplex volume controls tout that they fit into standard J-box depths.
Take a look at these under Audioplex: https://www.inwallstore.com/category_s/138.htm
You’ll want a standard volume control with no impedance matching. So look at the ones without the “OPT” option in Audioplex.
> Name :
> Ryan Kraemer
>
> Message :
> Dear Sir or Madam,
>
> My house is 11 years old and when it was built we had speakers built into the wall in various rooms in the house. The speakers throughout the house are controlled by a 6 pair speaker switcher connected to the audio receiver and cd changer. At each location where the speakers are, they are controlled by a simple volume control to adjust the sound in each location. I`m looking for a volume control that will work with a set of in wall speakers (2 speakers). The depth of the electrical box that it is in currently is 2 1/4″. Do you have anything that will work as described above.
>
> Thanks for you time.
>
> Ryan Kraemer
>
>