Steever Posted May 29, 2018 Share Posted May 29, 2018 I recently received a pair of Audible Physics’ new RG100.6 wide range 4” drivers. I had thought of putting them into my car in pod spheres on the A-pillars but, they need at least 1.5L (sealed) to work properly. Not conducive to a “discrete” A-pillar build-out. So, I decided to make something up for a bedroom/office at home. I very much like what spherical enclosures do for sound and so, settled on a simple full range design using IKEA bowls. Not original (check out Google) but it saves me a lot of time and effort otherwise. I decided on a ported design and although the spheres will give me far more than the 3L internal volume required, I have room for ballast and internal bracing. Ports are to be 36x160mm and I have some double flare, dimpled ones coming - thank you EBay. As you can see, these drivers do have a rising response on axis but plot quite flat when faced straight out from rear walls. Advice suggests baffle step correction may not be required in these enclosures unless I prefer a more on-axis toe in. I know of a network with -3dB correction but, I’ll see how things go wired directly first. I made up some 38mm ply bracing which will be used to glue/screw the two hemispheres of the pods to. Additional 19mm bracing will be applied on the other axis at 90° for strength. Tonight I rebated one of the pods for its driver. It’ll sit flush with a large 100% wool felt ring around each driver. The same felt will be used internally over some Dynamat style constrained layer damping material. Heavy five-way binding posts will be used and I will be making an unusual wood frame tripod equivalent cradle for each sphere for shelf mounting. Finish will be black gloss. The system planned is Tidal Hifi (streamed and offline) from my iPhone > Audioquest Dragonfly Red > Chinese mini valve amp of some kind > speakers. Speaker cabling will be Nordost 2Flat and I am yet to source a decent mini phono cable. More as progress is made... 4 Link to comment Share on other sites More sharing options...
Steever Posted May 29, 2018 Author Share Posted May 29, 2018 Tonight’s results after an hour of Dremel work. 3 Link to comment Share on other sites More sharing options...
Guest Hensa Posted May 29, 2018 Share Posted May 29, 2018 (edited) Very cool, Winno. They already look excellent with the timber finish! Should look very smart in piano black. Edited May 29, 2018 by Hensa Link to comment Share on other sites More sharing options...
davewantsmoore Posted May 29, 2018 Share Posted May 29, 2018 Looks cool! You will definitely have 'baffle step loss' (why wouldn't you?!) Link to comment Share on other sites More sharing options...
Steever Posted May 30, 2018 Author Share Posted May 30, 2018 (edited) 59 minutes ago, davewantsmoore said: Looks cool! You will definitely have 'baffle step loss' (why wouldn't you?!) That's what I thought too. Someone else who designed a slot-ported enclosure for the same drivers has used compensation with good results. The designer of the driver has suggested however, I try without correction first to see how I go, only then adding a network if I feel the need. Watch this space... Edited May 30, 2018 by Winno 2 Link to comment Share on other sites More sharing options...
hibo Posted May 30, 2018 Share Posted May 30, 2018 You could have saved some time by using a couple of diameters of hole saw and a chisel. Martin. 1 Link to comment Share on other sites More sharing options...
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