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Another Practical Use for YouTube

I came across an older version of Tin Pan Alley that I had made and for those who say YouTube is BS, it certainly serves well here to hear differences.

Especially listen on the first cut at at ~2:13 and you can hear a very pronounced resonance. Is it the room, or the speakers, or just the speakers exciting the room?

Doesn't matter because I was able to address it through minor changes to the crossovers and you will note that this resonance is pretty much gone and everything is more articulate in the second take.  Thus, I know that my modifications are going in the right direction.

Of course this also demonstrates another of my theories.  Changing the value of a $3 resistor can have a greater impact on the sound than changing out cables/components.

If you can't hear the difference, you need to change something.

https://youtu.be/cO8T6R2WhTE

https://youtu.be/P1R2dKRDFUk

toddalin
spenav
547 posts
 

Great job! Usually people don’t tune speakers for a particular room. It’s done the other way around: they change the room acoustic to fit the speaker. Not many of us have the knowledge to do what you did. Commercially, it would be impractical since the speaker manufacturer doesn’t know our room and would need to adjust the speakers ever time we move. More power to you. Have you thought of measuring the frequency response with something like REW?

toddalin's avatar
toddalin OP
658 posts
 

I have a Behringer DEQ 2496 61-band RTA that I use in tuning, but the ear gets the final say.  Seems like the mic is never exactly where my ears are and I primarily use it for near field measurements when determining what a part change is doing at the speaker.

Also, because the Behringer's pink noise is mono, you can only do one channel at a time.  Anyone who tries to use a mono pink noise signal on both channels simultaneously is engaged in an exercise in futility. 

jhnnrrs
142 posts
 

Let me get this straight.  You recorded two different times with the speakers in two different locations, and you think your $3 resistor is responsible for the change in sound?

toddalin's avatar
toddalin OP
658 posts
 

There have been several other changes to the crossovers over the years between the two videos.

For instance, Audyn caps were replaced by the Spragues because I prefer their sound, and they are not so rough/edgy.

But it was the addition of R5 and R6 that changed the slope and removed the resonance.  The speakers had been changed in position long before the resistors were added and the resonance remained.

Looking at the time frame when the video was first made, the crossover was probably of a configuration like this:

Here is a cut prior to the installation of R5/R6.  Again, YouTube to the rescue.

https://youtu.be/s0DoPF2yP3M

 

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