What would you do with this?

[Reilley]

My first post - hello everyone!

I've spent many weekends (as well as evenings doing online research) working to optimize my listening room - which doubles as our main living area so that speaker, subwoofer, and listening positions don't have much variability.

My room has been treated with a couple of corner-mounted (w/ air gap) 7.5in thick 2'x4' DIY bass traps, as well as a cluster of 4.5in 2'x4' clouds over the listening area also with air gaps behind them. The room measures 18' x 11' x 8' and the speakers and listening position are on the long walls, in roughly an equilateral triangle. One 11' side of the room is partially open to the rest of the floor, and the speakers are positioned asymmetrically with the right one closer to the corner. I'm using two large subwoofers placed in opposite corners of the room - their positioning is not really negotiable.

I've attached my individual L&R measurements from REW. I started tweaking room EQ using a good quality parametric unit (not reflected in the measurements), but as you can see from the numerous peaks and dips in the graphs, I'll quickly run out of EQ channels before I can reasonably level things out. So I'm looking for input as to where you would go from here?

 

[staticV3]

Hi @Reilley! Welcome to ASR.

First I'd try to figure out what's going on with the left speaker's treble response.

It shouldn't deviate nearly as much from the other channel. That's highly unusual.

Then I'd repeat the measurements using the Moving Microphone Method without any additional smoothing applied. That'll give you a more honest look at the in-room response where room modes aren't all smoothed away.

 

[Reilley]

Thanks for your input @staticV3.

My speaker’s tweeters crossover point is about 1.6kHz, and the L treble roll off starts at about 3.5kHz. If the tweeter was somehow damaged would it not have a much more ragged response (or no output at all) rather than rolling off? I’m wondering if a heavy leather chair that I have pretty close to - and level with - the left tweeter could be the culprit? Can’t start testing this now but will continue tomorrow.

Only issue with using the moving microphone method is that I don’t have a 90-degree cal file for my Dayton UMM-6 USB mic.

 

[Salt]

You could measure that single speaker nearfield and look how this works.