I am updating my studio. I put 2 GIK Monster traps on the front wall. I added 2 more inches using wood bars to get more airspace behind the monster traps.

I made two 6" traps with 1" space behind for the sides wall reflexions.
I have tri traps in the corners floor to ceiling.

So my question is!
I was going to build a 17" x 17" and 7 feet long Soffit Bass Trap to replace the 6" 4x4 panel in the middle above the monster traps. From ceiling to front wall. I attached a photo
Will the soffit Bass Trap make a big enough difference replacing that panel.
I don't mind doing the work to make the Soffit. it's fun but if it is only a minor difference I will pass.

The other alternative is to replace the trigrams and build the Soffit bass tracks so they form an upside down U shape. basically the floor to ceiling on both sides and ceiling to front wall.

Thanks for everyone help on this fun journey

bump!

Wow...
What are the dimensions of your room?
Are your monitors Micromain 26?
Do you have REW measurements?

I would recommend doing a speaker crawl to figure out optimal positioning before you do any more treatment. Those speakers deserve it.

Yes the speakers are micromain 26. They are so amazing.
My room is
19 feet front to back
9 1/2 feet wide
8 1/2 foot floor to ceiling
I’m sitting at 38% from the front wall

I have to do a REW measure ment

I bet they are. Some fantastic monitors right there.

It's definitely a good idea to measure (about a million times)

Measuring will give some idea of what is happening, as opposed to just guessing. You can sometimes get as much improvement to room response from moving your speakers as you can from adding treatment.

Without measuring, I would say that the easiest surface to treat is the ceiling (you lose no floorspace).

If it were me, I would put in a fabric and wood drop ceiling and cover the entire ceiling in R49 (you'd lose a little more than a foot of ceiling height doing this, but 7'4" is still enough room for almost anyone to stand up without scraping their head.

Here's a low effort ceiling cloud bass trap tutorial that I made.
https://youtu.be/gCZGA6FKNNU

You can just put 2x4s all the way around the edge of the room and make a fabric drop ceiling to cover it up when you're done.

That's the minimum effort maximum results option...

But if you measurefor speaker position first, then you can find out how much space you have for treatment at the front of the room.

Empty the room, put one of the speakers in a corner, and move the mic to find the flattest listening position.

Then move the mic to that listening position and move one speaker 1" at a time in each direction to find the flattest speaker position.

If you do that, then you can figure out how much treatment you can fit on the front wall and rear wall without compromising the whole space.

Your room is pretty narrow. If money is no object, I would imagine that installing some active traps in the rear wall corners would be the quickest solution that would make the biggest difference while sacrificing the least amount of floorspace.

I have GIK trip traps in the back corners and 6” bass traps on the back wall
What is an active trap? Is it different to what I have?

I like the ceiling idea. I will lost some measurements when I can get a second

An active trap is a very expensive subwoofer + microphone with some circuitry that actively cancels any signal it hears. So when a 60Hz wave hits the microphone the subwoofer plays that tone phase flipped to cancel out the reflection off of the back wall.

There’s the AAVA C20, the Bag End, maybe some others? Or if you’re an acoustics genius and have extra subs, reference mics, and DSP you can make your own.

That’s only for consideration if you need to save floor space. Much cheaper to use tuned traps or gigantic walls of insulation.