anyone made a large w or h dipole ????
Seeing the linkwitz and others' w dipoles,
And guestimating the resonance,
What about a 2' by 2' by 30" long h dipole woofer box ????
I'd extimate resonance near 140hz but perhaps the peaking would be lower due to greater distance............
The w designs look good like a push pull (non isobarik), and the sound of the reduced 2nd harmonics (and thusly 3rds on down) is an addictive sound.
To me it would be like a servo feedback thing that was featured in audioexpress a couple of months ago..............
Perhaps another try would be a large speaker box without the back. Think 2' high by 2' wide by 3' deep. Like the h designs, only a u design.............. Again the resonance would rear its ugly head.
I believe the resonance is ringing, not just peaking, to eq or notch out helps but the frequencies there would continue to ring after the signal has stopped............
Seeing the linkwitz and others' w dipoles,
And guestimating the resonance,
What about a 2' by 2' by 30" long h dipole woofer box ????
I'd extimate resonance near 140hz but perhaps the peaking would be lower due to greater distance............
The w designs look good like a push pull (non isobarik), and the sound of the reduced 2nd harmonics (and thusly 3rds on down) is an addictive sound.
To me it would be like a servo feedback thing that was featured in audioexpress a couple of months ago..............
Perhaps another try would be a large speaker box without the back. Think 2' high by 2' wide by 3' deep. Like the h designs, only a u design.............. Again the resonance would rear its ugly head.
I believe the resonance is ringing, not just peaking, to eq or notch out helps but the frequencies there would continue to ring after the signal has stopped............
Norman,
You must be reading about the latest efforts from John Kreskovsky and the "U" shaped woofer enclosure. 🙂
There is a resonance associated with the cavity, but I haven't seen any of what you would call "ringing" of the system created by this. The woofers seem very well damped and the bass "tighter" subjectively than any closed-box woofer I've listened to....and way better than any conventional ported box.
In comparison to a closed-box there is little air loading on the driver itself but the aerodynamic effects can be rather interesting.
Try some experimentation yourself.
Cheers,
Davey.
You must be reading about the latest efforts from John Kreskovsky and the "U" shaped woofer enclosure. 🙂
There is a resonance associated with the cavity, but I haven't seen any of what you would call "ringing" of the system created by this. The woofers seem very well damped and the bass "tighter" subjectively than any closed-box woofer I've listened to....and way better than any conventional ported box.
In comparison to a closed-box there is little air loading on the driver itself but the aerodynamic effects can be rather interesting.
Try some experimentation yourself.
Cheers,
Davey.
Re: anyone made a large w or h dipole ????
Konnichiwa,
It may be an addictive sound, but casnceling 2nd harmonics by using Push-Pull is paid for by adding up the 3rd harmonics. In subwoofers PP has it's place though as it is primarily mechanical non-linearities (causing 2nd harmonics) we fight. But higher, odd order harmonics are increased over simple acousticl paralleling, not reduced.
Yes, from experience the resonance is a fairly high Q peak, best reduced by making the inner walls non-parallel by sifting to a true "W" shape from double "U" shape shown by SL.
Sayonara
Konnichiwa,
norman bates said:
It may be an addictive sound, but casnceling 2nd harmonics by using Push-Pull is paid for by adding up the 3rd harmonics. In subwoofers PP has it's place though as it is primarily mechanical non-linearities (causing 2nd harmonics) we fight. But higher, odd order harmonics are increased over simple acousticl paralleling, not reduced.
norman bates said:
Yes, from experience the resonance is a fairly high Q peak, best reduced by making the inner walls non-parallel by sifting to a true "W" shape from double "U" shape shown by SL.
Sayonara
Re: Re: anyone made a large w or h dipole ????
Interesting. Again the intuitive explanation is clear, in this case, no bouncing back and forth of the mids (which I assume is described above as "ringing"?). Care to venture a general suggestion as to the most likely angle of the "w" config?
Thanks, there are lots of pieces of information out there. You guys are gracious in helping pull it together.
Sheldon
Kuei Yang Wang said:
Interesting. Again the intuitive explanation is clear, in this case, no bouncing back and forth of the mids (which I assume is described above as "ringing"?). Care to venture a general suggestion as to the most likely angle of the "w" config?
Thanks, there are lots of pieces of information out there. You guys are gracious in helping pull it together.
Sheldon
Oh, and how does the double w play out on the harmonic cancellation factor. I'm guessing somewhere between parallel and opposed?
Sheldon
Sheldon
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