@mikessi The D7608 chamber may work on the Yamaha Be dome but it would have to be scaled in the print setup to fit properly in circumference. The vent opening on the Yamaha is smaller and may react unfavorably with the extra width. I'm running my printer again today to set up for new filament. I started printing the last attempt and lost power as my son accidentally tripped the circuit breaker. By the time power was back on, the nozzle was already too cold to resume printing, but the first few layers looked pretty good with 70 % infill.
Yes, the outer 6 holes on the front side. But there are 6 holes on the back plate over the magnet, too. I will poke into them tomorrow, see if they go anywhere.
Oh, those 6 holes! They don't appear visually to line up with the VC gap, but they might. It wouldn't surprise either way if they are only just chamber vents or core gap vents.
Just a system question - why do you choose a "big membrane" (29mm) tweeter to combine with the dome? What is the planned cross over frequency?
It's admittedly not for purely technical or functional reasons. I began by trying a 3-way with the Satori dome at quite a low x-over -- 1.2~1.6 khz. I found it did fine, albeit with some increasing distortion there at higher amplitudes, which is important for Mark, the end user. I mentioned the Yamaha BE mid dome which would not exhibit distortion at high volume crossed even lower, and Mark loved the idea of the 2 "matching" BE domes cover the top end -- and the visual. Bragging rights, too.
The cross to the Satori is currently at 4khz, LR4. It sounds great but I haven't yet experimented with different slopes & freq. Yes, it beams starting at a lower frequency than the SB26ADC I suggested, but for the intended high reverb environment with listening position >3 meters, it's likely the better choice anyway.
This is the back chamber I came up with for my Scanspeak dome mids, its a schedule 40 pipe cap, I milled the inside to fit on the outside of the domes magnet, its internal volume is right at .3 Liter. I would like to know what damping material and arrangement to use? Thanks!
![PXL_20250331_163854819[1].jpg](https://www.diyaudio.com/community/attachments/pxl_20250331_163854819-1-jpg.1442945/ "PXL_20250331_163854819[1].jpg")
use inside it. Thanks!
Crossovers will be active using a MiniDSP Flex HTx. Im already tri-amping a pair of Polk LSiM703 so I'm all set up for tri-amping. Crossing the Polks at 500 and 3500, will have to raise the woofer to mid x over freq for the Scan domes I think . Going to use the mids with a Scanspeak 8" alum cone woofer, have various tweeters I can try.
Do you have FR and Impedance measurements of D7608 only? With both back enclosures, for comparison?
Sorry, I do not. I don't measure impedance now that I am using active crossovers. I did not keep the FR measurement with the smaller enclosure. I will post the midrange FR with the current enclosure later.
OK, here is the midrange FR with the .65L enclosure ,1 meter distance, LR12 highpass filter at 250Hz........ ignore the spike at 120hz.
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At about 80-85db, distortion in the mids and esp highs is very good I think. About 40-45db down in midrange and 50 down above 2K. Tweeter is Chinese "beryllium", great tweeter.
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