How to do room correction

I have several pieces from GIK and like their products a good bit.

In case someone needs to go quick and dirty.
These worked in all my rooms when 2/3 of the monitor back wall were covered.

RT60 is in most smaller rooms with this ø 200-400 ms.
The good news is, it killed a lot of room problems at once.

gearspace.com/board/bass-traps-acoustic-panels-foam-etc/61293-diy-broadband-absorber-pictures-posted.html

All good. I have made traps before.

I liked Kevin’s plan for his corner bass traps, very well constructed but simple and his back wall diffuser/mid band traps are also an interesting design.

I am thinking about redoing my room but making things modular and move able, am retired now, not certain how long I will be in current home.

Modular: for example I like how gik bass traps are around 3-4 feet tall so stackable and easily moved if need be.

Kevin’s 5 part series demonstrates using REW freq, RT60 and 1/3 octave bands to baseline your room’s sonic characteristics , introduce panels/absorption/ diffusion, retest and to compare and confirm results. His room started out around 6-700 ms of delay: ended sub 250 across 1/3 octave bands.

It’s not rocket science but he demonstrates a clear step by step process and how to use REW to confirm objectively what you are doing.

I just posted the first video for awareness, and if peeps were interested can grab a cuppa joe and watch.

His is one of the best, clear, simple demos of how to use REW I have seen, you really just need the ecm8000 calibrated mike, you guys can get one in the states for $75-100 and he also shows where you can get a generic calibration file on line for free.

For peeps, struggling with subs, video 3, I think demos him fighting his 90-100k room demon and integrating a sub: kinda fun for us sonic recording nerds: Eric watched it 10 times worrying about whether his quested are really good monitors ! ( joking of course)

1. I do not have the tools.
2. I do not have the space.
3. I DO have a 5yo son who will barely let me go to the bathroom by myself, much less build something involving saws and other sharp objects.

Sure treat your room first.
After this SW can do a lot for you it corrects phase issues …

Just wanted you guys to know I reached out to Kevin, who did that video series to see if he consults on room examination and refit and he does.

He helped me get my card calibration done right and gave me guidance on which graphs he wanted.

We had a great discussion about the graphs what looked good , what didn’t and next steps to explore remedying those anomalies. He was very helpful getting me to understand relationships between graphs and what the different graphs were implying but we also had that conversation in the context of exactly how my current room is set up and where absorbers and diffusers are and what to move for phase 2 measurements.

Seems like a great guy, helpful , knowledgeable and no big push on needless work and cost.

I’ll definitely work with him a little more but he already taught me a lot in like an hour.

I told him about our thread and invited him to chime in if he wants and told him Jk welcomes manufacturers, but runs a tight ship. He laughed and said gotcha.

Morning,

I have continued tweaking my rom set up based on REW measurements,

Here are 3 graphs comparing sweep 9 and 10

difference is I moved my monitors into my room 1 foot on long axis and closer together.

Green is Sweep 9, Purple is today's Sweep 10

first is freq response, 1/12th smoothing: flatter is better

second is rt60 by 1/3 octaves in ms : lower and more uniform is better

third is clarity ( sort off ratio between direct and reflected sound) : higher and more uniform is better


I am going to build some thicker bass traps in back using the bbc membrane plans for the low bass control

and  I will thicken some preexisting absorbers, also out to 6 inches, two at my first reflection points and behind my monitors

Other thoughts ?

thx !

Thx, for really mostly sweat equity, moving stuff around snd remeasuring, my room is honestly sounding the best it ever has ever sounded.

Not using a sub, too sophistamacated for me !:

The sub idea to me is counterintuitive as the room is causing the null. How does adding more sound at that freq change the room ?

Dimensions and modes are still the same?

It’s like saying the boat is leaking so let’s pour in more water ?

Or is the idea to just use the sub to compensate and simply overpower the null ?

Interesting articles:thx, the monitor height relative to room dimension argument is compelling as is the do whatever it takes to fix the sonic canyon at your listening position : he is just being sensible.

Kevin playing with his REW, room and sub: helps but doesn’t solve everything.