In-wall speaker install in bulkhead

[auujay]

I am about to install some in-wall speakers in a new bulkhead I am building. I know normally in-wall speakers are expected to be in a 2x4 or 2x6 wall with 16" oc studs.

In my case they will go in a bulkhead that is almost 6 feet long and 14" deep. Should I build a "back" for this wall so the cavity behind the speakers in more like a "regular" wall or should I just leave it open in back.

If I leave it open, the space behind the speakers will be about 6 cubic feet. Will that severly impact the sound? These are cheap monoprice inwall speakers that will be in the kitchen so a minor impact on sound quality is no big deal. However if they will sound really bad like this I want to close up the wall behind them while I still can.

 

[Haoleb]

In-wall speakers arent really designed to be installed in a typical wall as you mention, I mean there is no typical volume for where they will be installed. There are so many factors in the construction of the wall or ceiling that you're going to be fine just putting them into the wall as is or ceiling etc..

Many of the high end in wall and in ceiling speakers are designed with their own back enclosure's but for what you're doing they will be just fine installed as is.