Tightly, but not so much as to stress the driver frame. A bit of a fiddle and best done during assembly.
dave
thank you Dave!
tightly, got you. just trying to understand,
no danger of buzzing and such?
would leaving a thin gap between the driver and the brace work?
won't affect bracing much, and no danger of buzzing either.
i'll try the uFonken with a cardboard mockup. you mentioned at planet-10 site that for a different driver, the volume would need to be different too. so far i only downloaded winISD, is that good enough for volume and port adjustment? Mr. Smith provided a port size for the FE83, i'll try that as well.
also, is the "separator" in the port just providing support for the port piece above it? do i have to make it with 2 separated ports?
thanks a lot for helping!
ok.
why no though? i'd like to understand, provided if you'd care to comment on that.
The brace does no good unless it is bracingm and spreading energy from, the driver against 3 other panels.
dave
Sorry people, I have so little luck posting images on this forum! I'll try again:
Click here
The uFonken box, with Dave's suggested 66mm port divider, sounds quite nice with this driver; but being too small, it pulls out the lower midrange/upper bass. The box in this graphic sounds much more relaxed but gives this driver a lot of room to misbehave; the brace behind the driver is essential to helping control it. I set it so that it holds the driver off it's rebate about a paper's thickness, then the driver mounting screws pull it all together without distorting the driver's frame enough to threaten voice coil geometry. Also, I put modeling (non-hardening) clay between the magnet and the frame, which pushes this little speaker into "damn nice" territory:
Clay packing
My uFonken build with two stages of port spacer widening, ending up with close to 66mm:
BlueFonkens
I sure hope these graphics links (Dropbox) work!
Click here
The uFonken box, with Dave's suggested 66mm port divider, sounds quite nice with this driver; but being too small, it pulls out the lower midrange/upper bass. The box in this graphic sounds much more relaxed but gives this driver a lot of room to misbehave; the brace behind the driver is essential to helping control it. I set it so that it holds the driver off it's rebate about a paper's thickness, then the driver mounting screws pull it all together without distorting the driver's frame enough to threaten voice coil geometry. Also, I put modeling (non-hardening) clay between the magnet and the frame, which pushes this little speaker into "damn nice" territory:
Clay packing
My uFonken build with two stages of port spacer widening, ending up with close to 66mm:
BlueFonkens
I sure hope these graphics links (Dropbox) work!
Last edited:
Dave, can you share what FB the 66mm port divider created? There's more bass extension with the uFonkens than my cabinets, though, as I posted, the larger box gives a smoother more balanced sound; there is a better 'focus' for lack of a better word, with the uFonkens, but low vocal range is constrained, affecting mellow horn pitches, pianos, acoustic guitars... I'd be really thrilled to pull the extension into the box I came up with (6th pair of boxes I have made for this little driver!)!
Thank you for your input, and the excellent uFonken design! I'm looking forward to diving deeper into Planet10 magic when the disposable funds supply improves... playing with this $6.90 driver has been enormously rewarding, after some 20 years of fussing with 2 & 3 way crossovers.
Narmex, thank you for our questions; I am a Mac user, and haven't found anything affordable to model other than online calculators, most of which seem to be close to random, so I'm wasting a lot of Baltic Birch plywood and time circling an appropriate solution.
Here's a pic of the assembly (of the uFonken) with lining (spray glue (3M 77) & felt, and then a diver brace pic:
Link Felt Lining
Link Brace uFonken
Thank you for your input, and the excellent uFonken design! I'm looking forward to diving deeper into Planet10 magic when the disposable funds supply improves... playing with this $6.90 driver has been enormously rewarding, after some 20 years of fussing with 2 & 3 way crossovers.
Narmex, thank you for our questions; I am a Mac user, and haven't found anything affordable to model other than online calculators, most of which seem to be close to random, so I'm wasting a lot of Baltic Birch plywood and time circling an appropriate solution.
Here's a pic of the assembly (of the uFonken) with lining (spray glue (3M 77) & felt, and then a diver brace pic:
Link Felt Lining
Link Brace uFonken
PS I'm running these on a $6 Yamaha TA2024 ship amp board: 9 14V Beyond Voltage Range TA2024 New 20W Digital Amplifier Board Yamaha Program | eBay. Unreal detail, black noise floor, and a particularly rich (dense?) midrange character. It's strange to have this kind of revealing, delightful sound from $6.90 drivers and a $5.97 amp, seriously painful to think of funds and fruits wasted on trying to build capable systems in years past!
One last question for Dave: Is it possible to put functional Enable patterns on a raw aluminum cone, and if so, what chemistry? does the aluminum need to be etched first?
Your experienced input is deeply appreciated!
Your experienced input is deeply appreciated!
It is easy to do metal cones.And easy to fix mistakes. You can tell the quality of the cones, the better ones (eg Alpairs) are smoother and the spots go on very easoly. You use the same kit as for EnABLing anything else.
dave
dave
hi mwhsmith, the pic is showing now, thank you!
nice drawing, i wonder what software furniture makers use to produce such professionally looking drawings.
i'll definitely try your design. Dave said the 66mm port size for the uFonken is the optimal port size for the non-optimal volume. well i guess this design of yours is the optimal both then. but i would like to wait till you find a way to get more bass out of it, i need bass. 🙂
as for the winebox, i tried laying it sideways on my desk, as well as standing it up up-side-down, it sounded better then, more rounded over all.
now i'm going with uFonken with 66mm port. phenomenal! thank you for recommending the design and the port dimensions!
nice drawing, i wonder what software furniture makers use to produce such professionally looking drawings.
i'll definitely try your design. Dave said the 66mm port size for the uFonken is the optimal port size for the non-optimal volume. well i guess this design of yours is the optimal both then. but i would like to wait till you find a way to get more bass out of it, i need bass. 🙂
as for the winebox, i tried laying it sideways on my desk, as well as standing it up up-side-down, it sounded better then, more rounded over all.
now i'm going with uFonken with 66mm port. phenomenal! thank you for recommending the design and the port dimensions!
Last edited:
vectorworks... thanks
There isn't ever going to be a lot of bass from this driver. It's not a problem so much as a characteristic... that is to say the presentation of music isn't obviously lacking bass. It's quite delightful. It is mostly when you compare it to a deep-hitting speaker. The speakers I built for my work space (over a decade ago! they still sound really good), with Usher carbon-slurry paper 8" woofers & Morel tweeters... have exceptional, tight and deep bass. They sound smooth, too... but listening to this little system is just as compelling, in different ways. I am not sure if focusing the bass energy lower like the uFonken does, inherently leans out the upper bass/lower mids. It would be nice to have our cake & eat it, too, I suppose, but playing around with room gain goes a long way here, too.
I'll keep trying but I'm pretty thrilled with what's happening here and I'm getting ready t reverse-engineer a Boenicke W5-inspired speaker... The remaining exploration is reverse calculating what the 66mm-uFonken is tuned to, and try tuning my 3.84-liter boxes to the same pitch. Then we might see if it makes a cake.
There isn't ever going to be a lot of bass from this driver. It's not a problem so much as a characteristic... that is to say the presentation of music isn't obviously lacking bass. It's quite delightful. It is mostly when you compare it to a deep-hitting speaker. The speakers I built for my work space (over a decade ago! they still sound really good), with Usher carbon-slurry paper 8" woofers & Morel tweeters... have exceptional, tight and deep bass. They sound smooth, too... but listening to this little system is just as compelling, in different ways. I am not sure if focusing the bass energy lower like the uFonken does, inherently leans out the upper bass/lower mids. It would be nice to have our cake & eat it, too, I suppose, but playing around with room gain goes a long way here, too.
I'll keep trying but I'm pretty thrilled with what's happening here and I'm getting ready t reverse-engineer a Boenicke W5-inspired speaker... The remaining exploration is reverse calculating what the 66mm-uFonken is tuned to, and try tuning my 3.84-liter boxes to the same pitch. Then we might see if it makes a cake.
- Status
- Not open for further replies.