Yes, a sealed box for W6-1139 as sub to go with the sphere.
The point of using a sphere is that it has a well defined Baffle Step response.
That is the natural crossover.
The sphere is driven full range.
The sub has a first order low pass to suit the baffle step.
www.diyaudio.com/community/threads/chip-amp-photo-gallery.79303/post-7529819
Patrick
The point of using a sphere is that it has a well defined Baffle Step response.
That is the natural crossover.
The sphere is driven full range.
The sub has a first order low pass to suit the baffle step.
www.diyaudio.com/community/threads/chip-amp-photo-gallery.79303/post-7529819
Patrick
I agree with Patrick's point on the sphere and character. My Project has gone well though i struggled with crossover as it is a dual concentric woofer/tweeter unit, i am happy with the results. I have to add that size does matter and only with the accompanying 12" powered sub is it covering the 35Hz to 19k-Hz.
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This is what I built 3 years ago with Ikea bowls, using a dome 1-1/8" tweeter, 5 1/5" mid-woofer and 8" sub. Crossed tweeter to mid-woofer at 2,000 (12 dB slope) and crossed mid-woofer to sub at 100 Hz (12 dB). In addition to the sphere's benefits (no diffraction really) and an open soundstage, the dome shaped drivers also are consistent with the objectives of a sphere by radiating the sound pattern. The mid-woofer uses a 3" coil to handle power but also a spherical piston over the coil to act as a mid, and the surrounding cone increases the low freq. capability down to 100 Hz flat before roll off, which a 3" dome mid alone can't do. Some folks raise concern about distance between drivers but as you move back to a listening position the actual angle is still very small. Spheres don't resonate as they'd actually have to pulse in and out (as opposed to conventional box speakers' vibrating panels) and being the strongest geometric shape and the Ikea wood is very stiff, they don't. The damping inside is three-fold: paint with sand in it applied to inside the mimic cement board, rug underlay glued onto that and then fiber stuffing. The center pole mount also means no standing waves with a pole inside. The crossover is external in a separate box. Spheres are hard to make but don't need to worry about the internal bracing of box speakers.
I have another pair of a 4-sphere design with the bottom sphere holding a 6 1/2" Skar dual coil sub, same design with damping and internal pole, and bass is solid to 40Hz (and rolls off below) and no resonance.
I have another pair of a 4-sphere design with the bottom sphere holding a 6 1/2" Skar dual coil sub, same design with damping and internal pole, and bass is solid to 40Hz (and rolls off below) and no resonance.
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Do you think it would boom paddy
Comes with it's own stand, and should be a nice sub enclosure for those looking to pair up something a bit bigger.
Now you are justified to moan.
Comes with it's own stand, and should be a nice sub enclosure for those looking to pair up something a bit bigger.
Now you are justified to moan.