There is no easy way. I never paid much attention to that thread.
34%? A number eerily similar to what d’Apollito did that screwed up his Thor design. https://www.diyaudio.com/community/threads/clarity-on-seas-thor-kit.64799/
dave
Car driver, high Q. The only really important part of the box design is as big as you can get it. And you do not want to try to make more bass, it already does.
I suspect, unless you like overblown bass, and quarter-wave box will end up heavily stuffed and be close to aperiodic. The path does give more distance for the rear wave to travel thru damping giving a better chance of sucking it all up. A box can be teased into similar performance, but the partitions provide bracing, and the narrower passages hold the (well-teased) polystuff in place.
Don’t get too anal about the numbers. Given the input numbers are MIA they mean little. Just build something, something as big as you can live with.
dave
I suspect, unless you like overblown bass, and quarter-wave box will end up heavily stuffed and be close to aperiodic. The path does give more distance for the rear wave to travel thru damping giving a better chance of sucking it all up. A box can be teased into similar performance, but the partitions provide bracing, and the narrower passages hold the (well-teased) polystuff in place.
Don’t get too anal about the numbers. Given the input numbers are MIA they mean little. Just build something, something as big as you can live with.
dave
You have a 1:3 taper 54cm line that claims effective length 83.33cm, a multiplier factor of 1.543. Interpolating MJK Area Ratio Table 1 (by my redux) one needs 1:1.543^4.75 ~ 1:8 taper.
If stuffed (a la THOR paper) so sound slows to (3^1/4.75)/1.543 ~ 0.84X (mental math) then likely what planet10 said, nearly aperiodic little output (not a bad thing).
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The closest driver to my needs seems to be the Dayton Epique
https://www.parts-express.com/Epiqu...G-Subwoofer-4-Ohm-per-Coil-295-104?quantity=1
Can we disregard the driver diameter and use this one to model to end up with a 34hz pipe? I am interested in getting these at some stage
https://www.parts-express.com/Epiqu...G-Subwoofer-4-Ohm-per-Coil-295-104?quantity=1
Can we disregard the driver diameter and use this one to model to end up with a 34hz pipe? I am interested in getting these at some stage
If you are not using co-axial or fullrange driver on the desktop to cover at least midrange-to-high, there will be other problems of course. Subwoofers on the desk will be felt more than heard, I suspect.
You might take the 34L TLonken and squash it from 800 to 500, slot from 35 to 25, done. The CF 5.5" should be fine.
You might take the 34L TLonken and squash it from 800 to 500, slot from 35 to 25, done. The CF 5.5" should be fine.
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The thread-title tweeter-pointable-co-axial sounded interesting as a desktop speaker, because integration/directionality/combing otherwise would be the main challenges for 2-way. The Epique 5.5" has a large 7" mounting plate so tweeter won't be that close. CF has a dry hard sound; you'll have to decide if you can live with its midrange. I couldn't really find a dome tweeter to integrate soundwise with mine (resin-coated CF in ~10L closed box); Be dome was closest, but eventually I went with electrostatic super-tweeter and vintage alnico oval papercone widerange. (These my kludged/chimera nearfield reference monitors Ultrae, for ultra-sultry, sat in/on a protruding windowsill so no boosting needed.)
Sounds awesome. Would love to see some pics of the Ultrae
I am not discarding the Pioneers. They sounded so sweet that I will try building a few options before giving up on them. It's just I am interested in making a pair of two ways with higher power drivers for a dj desk also and thought it would be a good chance to give the Epique and my other 7" a run for modelling reasons
I am not discarding the Pioneers. They sounded so sweet that I will try building a few options before giving up on them. It's just I am interested in making a pair of two ways with higher power drivers for a dj desk also and thought it would be a good chance to give the Epique and my other 7" a run for modelling reasons
Also, I jumped on the Pioneers after listening to them because I wanted speakers for mic'ing on the desktop. Bass, DAW and effects live playing out of the pair of speakers and mic'ing the speakers. Again why I jumped at the TL form, I take it offsetting the driver can attenuate odd harmonic and that makes it sound like a good acoustic effects unit. The coaxial setup makes for easier mic'ing
I'll model a pipe tuned to 34Hz with the Epique and then make the boxes and fit the Pioneers to see how they cope. I hope there will be more opportunity for tuning as I go
Something that I need help with. Is my understanding correct that a one third offset can be used to cut the odd harmonic peaks. Am I understanding correctly that it will leave the 2nd harmonic untouched by much?
This is the driver and pipe segments entered into HR
I'll enter the reduction next. I'll start with 34% and also sim any other recommendations
Something that I need help with. Is my understanding correct that a one third offset can be used to cut the odd harmonic peaks. Am I understanding correctly that it will leave the 2nd harmonic untouched by much?
This is the driver and pipe segments entered into HR
I'll enter the reduction next. I'll start with 34% and also sim any other recommendations
