Absorption behind components and speakers rationale?

Try hanging a blanket or quilt in front of the door as a test and see what you get and go from there. It should help as obviously the glass door surely isn’t doing you any favors. 

+1. @soix.

Room correction can be overdone. So, it is best to try using simple methods to determine whether you need to do any correcting. A blanket, or rug makes a great adsorption tool.

Bob 

I found some bubos acoustical panels 4' x 2', a pack of five for about 100 bucks. On Amazono.

Fairly nice looking and probably will do good things I used panels like this before and super convenient

At least they can be easily adhered to the French double doors. I feel really smart right now

I get that absorption panels are used to absorb the first reflection

I thought that the general rule of thumb was diffusion panels at the first point of reflection?  Had I thought wrong? 

@emergingsoul - The reason the front wall can/should be treated is because most rooms reverberate when charged by the speakers and because it, too a different points has standing waves and reflections that will smear the sound field. 

If your speakers are ported to the rear, bottom, or sides, it will charge the front wall. Some speakers have multiple ports, some lower for the bass, some higher for the mids and tweets, so you may see a lower level of absorption and a higher level of diffusion behind the speakers, or between the speakers in the center. In my reference setup,

I’ve found Vicoustic Multifusors to be incredible in adding depth to the soundstage and making the center image as coherent as possible. I also use GIK Monster Bass Traps behind my speakers below 36”, as well as ASC Tube Traps from floor to ceiling in the front corners to absorb bass while diffusing higher frequencies. 
 

I have a pic of these treatments on my virtual system page:

https://www.audiogon.com/systems/11410