And they're almost done.
Actively crossed over two ways. The tweeter and mid are passively crossed first order @ 3000 hertz.
The two 10" GRS Polycone woofers are actively crossed at 200 hertz.
Pretty pleased with the finish so far, just walnut oil over dye, I will hopefully receive the beeswax sometime this week to blend with the oil for a polish.
Very little equalizing needed here, I boosted 300 hertz 2 db, and cut 12,000 hertz 3 db, really only need a sub for electronic bass "thump", pleasant sound.
Actively crossed over two ways. The tweeter and mid are passively crossed first order @ 3000 hertz.
The two 10" GRS Polycone woofers are actively crossed at 200 hertz.
Pretty pleased with the finish so far, just walnut oil over dye, I will hopefully receive the beeswax sometime this week to blend with the oil for a polish.
Very little equalizing needed here, I boosted 300 hertz 2 db, and cut 12,000 hertz 3 db, really only need a sub for electronic bass "thump", pleasant sound.
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Please don't make this a build thread to reduce clutter 
. Also why is the image sideways?
Spatial Lumina. Beryllium coax driver!
. Also why is the image sideways?Spatial Lumina. Beryllium coax driver!
An externally hosted image should be here but it was not working when we last tested it.
Please don't make this a build thread to reduce clutter
Fair enough, and I don't know why the image is sideways.
It was right side up when selected.
Gah - it's terrible! But I like how it sounds, just as ugly as it looks.
My ugly as sin, and likely heretical OB setup. It would need a lot work work, extra tuning with a dsp, for anything serious, but for my little office, it's fun.
I made it from some extra cabinet fronts I had laying around. The 90 degree offset is intentional, I like the response I get from these little cheap speakers.
Even worse is that I have a sub also in the room. But then again, these drivers are not full range, either.
For some reason this thing keeps rotating my pictures.
At least when you click it will open the full image correctly.
My ugly as sin, and likely heretical OB setup. It would need a lot work work, extra tuning with a dsp, for anything serious, but for my little office, it's fun.
I made it from some extra cabinet fronts I had laying around. The 90 degree offset is intentional, I like the response I get from these little cheap speakers.
Even worse is that I have a sub also in the room. But then again, these drivers are not full range, either.
For some reason this thing keeps rotating my pictures.
At least when you click it will open the full image correctly.
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After some time listening, repositioning, I've grown pretty fond of this setup. As some others have said before, "Stereo" is an artifact of perception, so I wasn't worried about placing 2 channels like this. They reflect off the room in a pleasant way.
Using others observations, I moved them a minimum of 3 feet from the wall, and it did improve the sound.
I'm making a similar arrangement for a family member and will be giving them a blind listening test before informing them of the good news. A happy day.
Does anyone know the pro and con for this setup with bass-drivers?
Expensive with double up. Is the backfiring drivers in reverse polarity to compensate for baffle step? If yes, how effective is this concept? Kyron claims 20 Hz??? (With AE Dipole 12 drivers)
Don't know but I heard these at Hornfest and was blown away.
An externally hosted image should be here but it was not working when we last tested it.
No, it's not for cancelling vibration force.
It's for making the dipole path length larger - increasing the distance of the front/rear wave cancellation.
The air between 2 woofers moves back and forth as a bulk without the behavior of soundwave. So, it should be quiet here. But there could be a weird sense of airflow. No problem in the normal listening position.
If the woofers operate in the same polarity, it'd become a quadrupole. For producing bass, the efficiency is too low.
It's for making the dipole path length larger - increasing the distance of the front/rear wave cancellation.
The air between 2 woofers moves back and forth as a bulk without the behavior of soundwave. So, it should be quiet here. But there could be a weird sense of airflow. No problem in the normal listening position.
If the woofers operate in the same polarity, it'd become a quadrupole. For producing bass, the efficiency is too low.
That's been around
'Width' would be more apropos than 'length'
Depends on what "needed" means.
With no EQ and baffle on floor:
If Fs = 100Hz with Qts = 2 then
a 2 ' baffle gives flat down to 100 Hz
If Fs = 100Hz with Qts = 1 then
4 ' is needed
Fs = 50Hz and Qts = 2 then
4 ' will go down to 50 Hz