John Sayers' Recording Studio Design Forum Archive

I actually cut the baffles without screwing them up! I don't think I have ever done that before.

Nice! It's going pretty fast, too. I'm dying to see how it turns out!


- Stuart -

I hope to be doing measurements on Sunday or Monday. Hopefully I can finish the assembly tonight, then fit them to the wall tomorrow. Then I have a very busy Friday and Saturday where I'm probably not going to get anything done.

Here is the box model. The speakers have a volume of 108L. The ports are tuned to 33HZ. Which is perfect for a 3" (inside diameter) piece of 7" of PVC pipe!

Nice to have something in those big holes!

The measurement set up.

Pictures from measurements last night. Still have a bit of a learning curve. My mic seems to not be responding well above 9k. I don't think it should matter in the crossover design though.
Tweeter response
Mid response
Woofer response
The response graphs are made using both nearfield and farfield measurements and blended using Charlie Laub and Jeff Bagby's FRD Response Blender. You can download the program and a paper on the methodology used for these measurements here http://audio.claub.net/software/FRD_Ble ... ender.html

Here is the response graph for the crossover that I have designed. It is flat within 3db, but that jag at 200hz kind of bugs me, but it is in the measurement.

I put together a crossover with parts that I had on hand. Some of them weren't exact (I used a 3uh inductor instead of a 3.7uh for example) I unwound some coils that I had for exact values and none of the capacitors were the exact value, but it made music and sounded pretty good! Here is a measurement of the speaker. My measurement microphone drops off severely above 10k.
The layout of the crossover and the build of the crossover.
The measurement system.

Listening nirvana. I had no idea that these would sound this good!

It looks fantastic, Eric! Congratulations! And I'm surprised at how fast you managed to put that all together, with such skill and craftsmanship! (Of course, I do understand all the weeks of work that went into the design first!)

Can't wait to see the final REW data, after all your tweaking is finished.

- Stuart -

This is stereo from the mix position. I have never heard imaging like this before!
Now I have to learn how to measure a room.

Soundman2020 wrote:It looks fantastic, Eric! Congratulations! And I'm surprised at how fast you managed to put that all together

- Stuart -

Especially considering how long the studio has taken.

Now I have to learn how to measure a room.

AHhh! Now we are talking about one of my favorite subjects! If you are interested in doing it the way I normally do (using REW), then PM me, and I'll send you the instructions I normally give to my paying customers on how to do that.


- Stuart -