I appreciate the kind words. They do not sound terrible but they also do not image well. The tweeter is not oriented directly above the woofer, so it might look better rotating the other direction. I plan to redo the crossover at a later date using my new favorite free and fun tool. Vituix CAD.
Have you put it in VituixCAD yet? While the relatively flat lines do look like it is likely good, the polar plots, listening window plot, and in-room response are the best objective measure of how it is going to sound. With your ears being the final judge.
Felt like making some eggs this morning. I changed the outside laminate to add a bit more interest. My Vituix CAD simulations are matching up nicely now. I feel like some of that was being caused by a very cheap aux cord that I was using from my laptop. Any coments?
I think I need to make two Turntables with speaker stands built in. At the eye doctor we need to choose quickly between A and B. I currently have the pair of eggs with slightly different crossovers. I can rotate them to face rearward with some difficulty and switch between them using a mono source by simply reaching back to a little bear passive volume/switch. I can definitely hear a difference, one sounds more forward than the other, but I do not yet know why or which one is more accurate. I would like to be able to check on and off axis responses while I also training my ears to correlate things I hear with things that I measure. My front wall is not flat so I have room to hang out and do my computer shit back there. I might as well make them look nice so I wont have to store them away. All opinions are welcome.
Based on your drawings and pics, I would suggest that your speakers appear to be too close to reflective room surfaces to get good measurements. What does your OmniMic impulse response screen look like?
Did I do it right? Remember, I do not have any paneling on my walls. Just fabric over fiberglass and wood strips. Absorption is dominant. Let me know if I need to do something different.
That seems like a pretty early first reflection to me. With some pillows on my carpeted floor between the speaker stand and the measurement mic I can set the gate at ~5 mSec (just before the first refection in the impulse response) at a 1 meter mic distance.
Looks good. I printed the protractor from OmniMic's help file and glued it to the top of an old swivel chair. It has 7.5 and 15 degree increment breakouts. Vcad converts whatever you input into 10 degree increments.
Comments
What xover schematic did you use for this set of measurements?
I'd agree with the rest, likely not bad sounding at all.
I appreciate the kind words. They do not sound terrible but they also do not image well. The tweeter is not oriented directly above the woofer, so it might look better rotating the other direction. I plan to redo the crossover at a later date using my new favorite free and fun tool. Vituix CAD.
Have you put it in VituixCAD yet? While the relatively flat lines do look like it is likely good, the polar plots, listening window plot, and in-room response are the best objective measure of how it is going to sound. With your ears being the final judge.
Good idea.
Felt like making some eggs this morning. I changed the outside laminate to add a bit more interest. My Vituix CAD simulations are matching up nicely now. I feel like some of that was being caused by a very cheap aux cord that I was using from my laptop. Any coments?
Your ‘signature designs’
Very cool. Remind me, are you targeting a transmission line or multi-length port design?
3 lines of equal length but very different taper ratios
I think I need to make two Turntables with speaker stands built in. At the eye doctor we need to choose quickly between A and B. I currently have the pair of eggs with slightly different crossovers. I can rotate them to face rearward with some difficulty and switch between them using a mono source by simply reaching back to a little bear passive volume/switch. I can definitely hear a difference, one sounds more forward than the other, but I do not yet know why or which one is more accurate. I would like to be able to check on and off axis responses while I also training my ears to correlate things I hear with things that I measure. My front wall is not flat so I have room to hang out and do my computer shit back there. I might as well make them look nice so I wont have to store them away.
All opinions are welcome.
Image is not to scale
Your priorities are in order.
I assume there is more beer in reality than in the image?
Based on your drawings and pics, I would suggest that your speakers appear to be too close to reflective room surfaces to get good measurements. What does your OmniMic impulse response screen look like?
Did I do it right? Remember, I do not have any paneling on my walls. Just fabric over fiberglass and wood strips. Absorption is dominant. Let me know if I need to do something different.
You should be able to set your gate at about 3.2ms. That should be fine.
That seems like a pretty early first reflection to me. With some pillows on my carpeted floor between the speaker stand and the measurement mic I can set the gate at ~5 mSec (just before the first refection in the impulse response) at a 1 meter mic distance.
Your floor looks like painted concrete. Yes?
Yes. My microphone distance was 24 inches. Tweeter at 50 inches off floor.
Anything closer to mic, like ceiling, HVAC or side walls? Looks like a reflection from something around 32 inches from the mic.
Probably from the rolling cabinet that it was setting on
Here is the other speaker at one meter on a cylindrical base. I don't see anything major
I used a 10 inch lazy susan bearing and a a ball bearing under the rear post. the bearing shaft also serves as the pointer.
Oh ya. My wife cut the angle indicators out for me on her laser from 1/8 inch thrifty white bath panel.
SWEET!
That's nice, sent you a PM.
Looks good. I printed the protractor from OmniMic's help file and glued it to the top of an old swivel chair. It has 7.5 and 15 degree increment breakouts. Vcad converts whatever you input into 10 degree increments.
Wow! That beats the hell out of my little plastic protractor with a piece of string attached to it.