Did u use the BSC circuit on + side?, (3,9 ohms and 1.0 mH in parallel). I am confused by 3,9 ohms, or is it 3.9ohms?, these parts available at Partsexpress?
thanks,
gychang
The W3-881si's are sold out at Parts Express in the US. I think they are now available on ebay. If you like this driver you may also be interested in this quad driver bipole MLTL: http://www.diyaudio.com/forums/full-range/234535-tangband-w3-881-mltl-build.html
The W3-1053sc driver is quite nice but you may get better results if you use the AMLTL technique to size the port and volume for better performance.
http://www.diyaudio.com/forums/full-range/231951-accidental-mltl-technique.html
My guess is that the volume of the current nano tower is too big for the lower Qts of the W3-1053sc vs the 883si and will force the tuning to be unusually deep circa 40 Hz. This will cause a very depressed bass output vs the rest of response. Change the tuning closer to 55 Hz and adjust the cross sectional area to get a volume closer to the ideal volume recommended by a bass reflex calculator.
Of course, this can be modeled very easily to find optimum cabinet and vent size.
http://www.diyaudio.com/forums/full-range/231951-accidental-mltl-technique.html
My guess is that the volume of the current nano tower is too big for the lower Qts of the W3-1053sc vs the 883si and will force the tuning to be unusually deep circa 40 Hz. This will cause a very depressed bass output vs the rest of response. Change the tuning closer to 55 Hz and adjust the cross sectional area to get a volume closer to the ideal volume recommended by a bass reflex calculator.
Of course, this can be modeled very easily to find optimum cabinet and vent size.
Thank you for the good information. The 883si is a little more expensive now (about $26 each), so I was looking for a cheaper alternative. The originality of designs in this forum are simply astounding to me. I'm looking forward to starting my own project soon.
Best,
Brian
The nanotowers are finished and working! They are currently in the unfinished side of my basement where most of my "messing around" work takes place. I used Tang Band W3-881SJ 3 inch neodymium drivers. I have a video of them being driven with a Dayton DT100a. The source is a laptop running JRiver to a small, external DAC. The ipad does not do justice to the quality of the sound. The transparency and imaging are quite outstanding. Thank you to everyone who helped me with good advice and thoughts. And, of course, a big thank you to cogitech for his help here and via PM.
I'm thinking of using them outside on a covered deck. Do you think the drivers are up to outside conditions (I have covers for the speakers)?
The video is here:
https://www.youtube.com/watch?v=3AHW4nBLE_M
Thanks and Best,
Brian
I'm thinking of using them outside on a covered deck. Do you think the drivers are up to outside conditions (I have covers for the speakers)?
The video is here:
https://www.youtube.com/watch?v=3AHW4nBLE_M
Thanks and Best,
Brian
cogitech--thank you!
I just moved them onto the deck. Without the "room effect" they sound even better. At about a foot and a half from the wall, the bass really kicks in. We have a pretty decent high-end system in our upstairs theater room and I had thought this system would end up being used in the basement. However, my wife came down to the basement and heard the nanotowers while I was experimenting and she said, "Wow! You have to move those upstairs!"
Thanks again for posting your original idea and spec--I suspect these little guys will give me many hours of enjoyment.
Thank You and Best Regards,
Brian
I just moved them onto the deck. Without the "room effect" they sound even better. At about a foot and a half from the wall, the bass really kicks in. We have a pretty decent high-end system in our upstairs theater room and I had thought this system would end up being used in the basement. However, my wife came down to the basement and heard the nanotowers while I was experimenting and she said, "Wow! You have to move those upstairs!"
Thanks again for posting your original idea and spec--I suspect these little guys will give me many hours of enjoyment.
Thank You and Best Regards,
Brian
Nanotowers outside
I have not listened with a full-range systems, but if my phone mic is working well, this video should give you a good idea of the sound in a more neutral environment. The bass is pretty good with the speakers positioned like this.
https://www.youtube.com/watch?v=R1NPbE0ybto
Best,
Brian
I have not listened with a full-range systems, but if my phone mic is working well, this video should give you a good idea of the sound in a more neutral environment. The bass is pretty good with the speakers positioned like this.
https://www.youtube.com/watch?v=R1NPbE0ybto
Best,
Brian
Astonishing, isn't it? Your design really brings the most out of that little driver. I've found the following, after an extended listening session with a wide variety of material:
This speaker does even better with room to breathe. I have them positioned about a foot from the wall and I listen to them from about 15 feet away. The deck they are on is open to the front and sides, but has a roof. At this distance, the bass is simply astonishing; I would say it picks up an extra octave. It truly does sound like there's a sub! Vocals and individual instruments are beautifully and transparently reproduced with superb transients (I'm hearing subtle stuff I have not heard on my Linnaeum speakers). With the drivers I'm using (which are a little different from yours), I can drive these speakers to very high levels with the Dayton with no distortion or loss of smoothness. even on complex passages (where I though the sound might be muddied or confused), this clarity and separation is preserved.
I ran across your Youtube video purely by chance--I had never even considered single-driver speakers up to this point. I'm glad I did. I'm a total convert! You might try using the drivers I bought in your own nano towers if you have the urge to experiment further.
Thanks and All the Best,
Brian
This speaker does even better with room to breathe. I have them positioned about a foot from the wall and I listen to them from about 15 feet away. The deck they are on is open to the front and sides, but has a roof. At this distance, the bass is simply astonishing; I would say it picks up an extra octave. It truly does sound like there's a sub! Vocals and individual instruments are beautifully and transparently reproduced with superb transients (I'm hearing subtle stuff I have not heard on my Linnaeum speakers). With the drivers I'm using (which are a little different from yours), I can drive these speakers to very high levels with the Dayton with no distortion or loss of smoothness. even on complex passages (where I though the sound might be muddied or confused), this clarity and separation is preserved.
I ran across your Youtube video purely by chance--I had never even considered single-driver speakers up to this point. I'm glad I did. I'm a total convert! You might try using the drivers I bought in your own nano towers if you have the urge to experiment further.
Thanks and All the Best,
Brian
Did you play with adjusting the damping at all? I found that optimal bass response was only achieved after adding far more damping than I had anticipated....
Looking forward to seeing your video response!
I know this is older thread but I have these speakers in garage and want to put them in nanotowers (prefer to TABAQ since like the idea of speakers near top). Anyone use these in the Needles?.
There is no BSC right?, needs lot of stuffing or minimal...?
Regarding stuffing, I did not stuff the speakers, but lined with walls with a dense foam padding that was part of a carpet. I lined the sides from top to bottom, but the front and back of the speakers to about an inch under the drivers and an inch above the bass port. This arrangement produced good bass with no "boxiness," so I did not experiment further. I'd be interested to know how others experimented with stuffing on this design and the results.
Thanks and Best,
Brian
Thanks and Best,
Brian
thanks, Brian, I started to make the nanotowers today, tomorrow edge banding the plywood and sanding and staining... I have some carpet foam padding, u lined them all 4 walls (front and back little less?). Most likely I will glue the cabinet, so I want to get this right first time...
gychang
Attachments
Hi, gychang,
On the front, I ended the padding an inch or two under the driver. On the back, I ended about the same distance above the port.
Your cabinets look very good! Good luck in the assembly. I think you will be very pleasantly surprised by the sound these speakers produce.
Best,
Brian
gychang,
I highly recommend doing some tinkering with the stuffing.
An easy way to do this is to glue up all pieces except the back. Then install some self-adhesive foam weather-stripping around the perimeter of the cabinet and use several clamps to bind the back panel to the cabinet. This provides a good seal and allows you to tweak the lining and/or stuffing to the way you like it.
I lined 3 of the 6 interior walls with 2" thick fiberglass insulation. This wasn't enough, so I proceeded to add polyfil and adjust it till I found the sweet spot (which is very subjective). Then I glued them up tight.
Good luck. Very interested to see the finished speakers and hear your thoughts on the sound!
I highly recommend doing some tinkering with the stuffing.
An easy way to do this is to glue up all pieces except the back. Then install some self-adhesive foam weather-stripping around the perimeter of the cabinet and use several clamps to bind the back panel to the cabinet. This provides a good seal and allows you to tweak the lining and/or stuffing to the way you like it.
I lined 3 of the 6 interior walls with 2" thick fiberglass insulation. This wasn't enough, so I proceeded to add polyfil and adjust it till I found the sweet spot (which is very subjective). Then I glued them up tight.
Good luck. Very interested to see the finished speakers and hear your thoughts on the sound!
No BSC.
Stuffing requirement is subjective. Please see above comments from Brian and myself.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.