Random Thought Thread

[tinfoil hat timmy]

Time to start apple eating maxxing

 

[Richard338]

I resurrected my stereo which lasted 20 years before dying in a lightning strike, and set it up in my new place.
I did some frequency sweeps with a calibrated microphone to help adjust the speaker placement. In an untreated room you can land on various bass resonances and cancelations. My starting point was pretty bad, but I improved it quite a bit just by moving them around.
When you think that my shooting ear muffs dampen 30db, a 20db dip is pretty huge.

Initial, left spk in pink, right spk in blue


Variation of left speaker with dist from wall


Final, left blue, right green.


Now I need to see how much room treatment my wife will let me install...

 

[ferider]

Nice, Richard338 . What's with the high tones ? Microphone limitation ?

And maybe don't tell your wife that below 100 Hz you can't hear where the sound comes from.

 

[tinfoil hat timmy]

I resurrected my stereo which lasted 20 years before dying in a lightning strike, and set it up in my new place.
I did some frequency sweeps with a calibrated microphone to help adjust the speaker placement. In an untreated room you can land on various bass resonances and cancelations. My starting point was pretty bad, but I improved it quite a bit just by moving them around.
When you think that my shooting ear muffs dampen 30db, a 20db dip is pretty huge.

Initial, left spk in pink, right spk in blue
View attachment 3106400

Variation of left speaker with dist from wall
View attachment 3106402

Final, left blue, right green.
View attachment 3106403

Now I need to see how much room treatment my wife will let me install...

I'm too dumb to understand this.

I'm pretty sure squiggly line goes down equals good?

Eta

Hay that looks like my stock portfolios value heh

 

[Richard338]

Nice, Richard338 . What's with the high tones ? Microphone limitation ?

And maybe don't tell your wife that below 100 Hz you can't hear where the sound comes from.

The profile for the high frequencies is pretty typical in these measurements. I'll have to check my speaker's reference output curve.
Most people focus on the bass and mid region as that's where you can most easily tweak things.
If I get it close to ideal, then I can optionally adjust it electronically (dsp).

ETA likely the mic (measurement setup), my speaker is within 6db from 30Hz to 50k Hz...