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3D printed subwoofer box
Powerful 3D printed 5 inch subwoofer - SW2
A 3D printed passive subwoofer using 5″ Tang Band driver.
Subwoofer Concept
Our previous 3d printed subwoofer, the SW1, is a 13 liter subwoofer with a 6.5″ driver, a matching passive radiator and a plate amp. We wanted to develop something smaller that would still offer the bass extension that satellite speakers so badly need. The result is the SW2 using a Tang Band W5-1138 5″ long-throw driver and the same Dayton Audio DSA175 passive radiator as in the SW1. The enclosure is now only 5 liters and much easier to fit on a desktop. The passive resonator allows tuning the resonance frequency to avoid overlap with room modes, for example. The spherical shape is optimal for material use and stiffness. Combined with the small diameter driver with large surrounds, the appearance is quite unique. If a traditional box is what you want, then this build is not for you.
Measurements
The measured resonance frequency of the passive radiator indicates that some air-coupling occurs due to the downward firing placement. Simulated resonance frequency matches the measured value (53 Hz) when 16 grams of added mass is used. Mass can be further added using washers to tune the response. In practice, the frequency response starts to drop below 50 Hz. The Arylic amplifier offers DSP capabilites and using a computer as the source allows unlimited DSP with zero cost. Therefore, frequency response in not that meaningful especially when considering the room effects, but we have included some measurements to give an idea of the natural response especially around the lower cut-off.
3D printing
The enclosure is printed in one part (234 mm diameter) and takes approximately 1.5 kg of filament. Print time is about 48 hours. The mass can be increased by lining the walls with sound deadening mat. Although the external wall is spherical, there is a cylindrical inner wall that braces the woofer to the passive resonator and, thanks to a single curvature surface, allows easy installment of thick sound deadening mat.
The drivers are fastened using 4.2 mm wood screws. There is a geometry file for a gasket for the woofer which can be printed from TPU. Traditional gasketing methods will work, but the 3D printed gasket is seamless and has the screw hole pattern accurately incorporated. The binding posts are recessed deep into the enclosure and only accept banana plugs in that configuration. An O-ring under the binding post washer is recommended and there is a chamfer for it. 3D printing using a wood-filled filament allows easy sanding for a smooth surface finish. The photos show 15 minutes worth of post-processing making this a very easy and fast build without compromising in function and looks.
Images
Sound quality
The subwoofer was compared to the much larger, THX certified Logitech Z623 subwoofer. The sound is very similar, but in a much smaller package. The SW2 is a great companion for small satellite speakers and brings fullness to the bass. Electronic music will benefit from the “boom” offered by this small unit, while other types of music may require turning down the level a bit for a tighter bass.
Links and video
The 3D files can be found in Etsy store:
https://www.etsy.com/shop/RDPhysics
Please support us by using the affiliate link below just before ordering the components:
TangBand W5-1138 on SoundImports.eu
Dayton Audio DSA175-PR on SoundImports.eu
Arylic 2.1 BT amp on SoundImports.eu
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Modification of the 3D printer box
Miscellaneous
Having bought a 3D printer and started printing on it, I began to dive into the nuances of printing, one of which is environmental conditions - this will be discussed. Since the Wanhao i3 cannot boast of a closed case, ABS printing on it is somewhat difficult (although, frankly, printing on it is difficult in principle without numerous modifications) - in general, drafts and temperature changes made themselves felt.
Since the 3D printer was located in a garage, which was very expensive to heat with electricity, and it was necessary to print even in severe frost in winter, I assembled a small box, which I pasted over from the inside with a 4 mm thick 'Izolonteip' heat insulator. With grief in half, this helped at least somehow (not without problems) to do the job for which the printer was purchased. Now a new task has appeared, for which I generally planned to purchase a more serious device, but first I decided to try to squeeze the maximum out of Wanhao i3. Since the 3D printer moved from an unheated garage to an unheated balcony, the first thing I was interested in was soundproofing. Through the balcony glass, all the attempts of printing were perfectly audible, which made it difficult to sleep. I decided to glue it on all four sides (except the door and the floor) with absorbent foam. The photo shows a part of a box from an old Soviet cabinet, three layers of 'Izolonteip' and one layer of 'Biplast Premium 15A'.
One of the two lamp sockets began to lose contact within a year, so I decided to remove it, insulate the cables and cover with a noise absorber, because The lamp on the side of the door often blinded. In the photo, the sticker process is just before closing the cables.
Initially, I hung the door on the hinges not very accurately, so there was a large gap between the upper edge and the ceiling of the box, through which the heat escaped. I decided to outweigh the door and drove it flush - albeit a little, but the temperature regime will become better.
The second problem I saw was vibration from the 3D printer. On the one hand, this was directly related to soundproofing, because. the absorber could not help in any way from structural noise, and given the low weight and 'jerky' design, the vibrations produced tangible. On the other hand, my experience has shown the negative impact of vibrations on the feed mechanism, which is why I even decided to take it out of the box.
In general, the box did not have a bottom before, but I came to the conclusion that it is necessary for normal vibration isolation. At the same time, I saw two options for how to do this - firmly tie the 3D printer to the box and isolate it, or first isolate the printer from the box, and then the box from the surface. From the point of view of the quality of the device itself, the first option would be more preferable, because. parasitic movements could be reduced only by increasing the mass. But the printing of additional equipment and fastening in a closed box (with all the consequences in the event of any malfunction requiring the removal of a 3D printer from the box) inclined me towards the second option.
Put the bottom on confirmations and closed it with plugs. I sawed off all the extra strongly protruding parts. I made a hole in the center of the bottom to output the control unit. Thanks to physics for the fact that heat rises and cold falls - it will not greatly affect the change in temperature) Next, it's time to choose the material for insulation.
I once used a Getzner vibration isolator for repairs - this is an Austrian company, a leader in the production of such things - and I had a small piece left after the repair. Unfortunately, specifically my 'model' is designed for fairly high loads (roughly speaking, 1 kg needs to be put on 1 cm2), so I could only use it under the box itself to isolate it from the table. And under the printer, I decided to lay a regular 'foam' rug all the way.
I was satisfied with the result. There is no more movement on the table during printing, and the noise level has been significantly reduced. Now the printer can be operated around the clock and it does not interfere during sleep.
I also really wanted to place the spool with plastic inside the box so that it would be at the same temperature (when printing in winter is a very critical moment) as the air inside the box (40-42 degrees at the bottom, judging by the weather station), but it simply does not go there fit so that it was convenient to change it and in which case it would be possible to reach any part of the 3D printer.
Therefore, the coil left the side wall to the top of the box along with the light switch.
From plans for the future to finalize the box:
1. Close the open parts of the laminated chipboard with a PVC edge so that it does not look so shameful and does not absorb moisture.
2. Make a thermally insulated superstructure above the box (where the coil is), make a perforation in the current box cover. Then a heat bag will form at the top, which will warm and dry the plastic.
3. From the bottom under the bottom make a soundproof niche where to place the control unit and button group with 'power on', 'light on', 'convection', 'blowing'
4. Install a fan in the main duct for slow convection in order to equalize the temperature in different parts of the duct
5. Install the fan on the hole between the bottom and the niche for forced cold air blowing in order to equalize the temperature from overheating.
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50 cool things to 3D print / Habr
No 3D printing ideas? Tired of worthless trinkets? Here is a list of 50 cool really useful things for 3D printing.
Like us, you are fascinated by the possibilities of 3D printing. But, unfortunately, the horizon is littered with trinkets, trinkets and other unnecessary things. We are in danger of being buried under a heap of useless rubbish.
Throw off the shackles of mediocrity! Let's create really useful things! Here is a list of cool things that you can make on a 3D printer right now. Prove to your family and loved ones that this wonderful technology can be used daily and in practice.
No access to 3D printer? No problem. Just upload your files to our 3D printing price comparison system and choose the best price, ONLINE!
Don't have a 3D printer to print these amazing things? Then come to
Download from ThingiVerse
3D Printing Cool Thing #2: Socket Shelf
Attach a shelf to your power outlet to support your phone while charging. The shelf has a slanted recess that allows you to keep your smartphone or tablet upright.
Download from ThingiVerse
3D Printing Cool Item #3: Soap Dish
Elegant bathroom soap dish with two washable compartments. You can change the pattern of the inner pallet if you wish.
Download from ThingiVerse
3D Printing Cool Item #4: Nightstand Tag Handles
The art of storage doesn't have to be boring. The Hobb Knob is a small pen with a label to describe the items in the drawers. Now you will never lose your socks!
Download from ThingiVerse
Cool 3D Printable Item #5: coasters with geometric patterns
When it comes to hot drinks, mug circles are an inevitable risk.
Things take a much more serious turn if there is a coffee-addicted inhabitant in the house. Available in three designs, these coasters help you avoid unsightly stains.
Download from Pinshape
3D Printing Cool Thing #6: Hinge Lamp
This hinged modular lamp consists of 6 main elements: base, body and top with LEDs. To make the lamp taller, you can add the required number of elements.
Download from MyMiniFactory
3D Printable Cool Item #7: one-handed bottle opener
This boomerang-shaped bottle opener is useful for people who have difficulty performing activities that require the application of force, for example opening a plastic bottle. Print it out and give it to your grandmother. She will appreciate this gesture.
Download from ThingiVerse
Cool thing for 3D printing #8: shower head
Is swimming under a waterfall on your list of things to do before you die? The next best thing is a 3D printed shower head (probably).
Download from ThingiVerse
3D Printing Cool Item #9: Secret Shelf
Hide valuable documents and stash from prying eyes on this secret shelf.
Download from ThingiVerse
Cool thing for 3D printing #10: jar handle
Enhance empty jam jars with a printed handle. What could be easier?
Download from ThingiVerse
3D Printing Cool Thing #11: Plastic Wrench
A full size general purpose plastic wrench. Actually for screwing and unscrewing around the house.
Download from ThingiVerse
Cool thing for 3D printing #12: business card holder
"What a delicate yellowish tint, and the thickness is tasteful, oh my god, even the watermarks." Do you have such a business card? Find her a pair in the form of this business card holder, printed in its entirety (yes, already with a hinged lid). Instructions for adding a custom logo are included.
Download from ThingiVerse
3D Printable Cool Item #13: Alien Invader Shaped Toilet Paper Holder
Brighten up your bathroom with this functional printable model of a classic alien invader... ahem holding your toilet paper.
Download from ThingiVerse
3D Printing Cool Thing #14: lift platform
Here is a fully assembled lift platform. Printed in full. No need to fiddle with a bunch of details. The adjustable height can be used to lift or support an object of acceptable weight.
Download from ThingiVerse
3D Printing Cool Thing #15: Plant Drinker
Houseplants fallen victim to neglect? FORGET ABOUT IT. Print out this simple automatic plant drinker and your conscience will be clear.
Download from ThingiVerse
3D Printing Cool Item #16: earbud holder
We spend a lot of money buying headphones on the go, but we don't protect them enough when we use them. Hide your headphones safely in this 3D printed holder.
Download from ThingiVerse
Cool 3D Printing Thing #17: Package Pen
We all know this situation. You trudge home from the supermarket, loaded with bags of groceries. The force of gravity causes plastic to crash into your palms, am I right? ENOUGH. Print these bag handles and forget about chafed palms forever!
Download from ThingiVerse
Cool thing for 3D printing #18: tablet stand
There are times when you need to free your hands when using your smart device, such as watching TV shows or cooking recipes. This simple stand supports 7" and larger tablets in both portrait and landscape modes.
Download from Pinshape
Cool 3D Printing Item #19: Plant Drinker #2
Another horticultural art contraption. It is especially suitable for kitchen plants. The next time you buy fresh herbs for cooking, transplant them into this neat device and they'll stay fresh all week long.
Download from ThingiVerse
Cool thing for 3D printing #20: door stop
Tired of everyone slamming doors at home or in the office? Then you need an UNCOMPROMISING door stop. Light weight, child safe, designed for easy installation and easy fabrication on an FDM 3D printer. The creator of the stop also claims that the device can be used to repel zombie attacks, however this version has not been verified.
Download from ThingiVerse
3D Printing Cool Item #21: Windshield Scraper
If you want to quickly and easily get rid of snow and ice on your car windshield with this handy scraper. Printed without support, at the end there is a hole for a lace.
Download from ThingiVerse
3D Printing Cool Thing #22: Water Hose Control
This special nozzle controls the flow of water in the garden hose, about 2 liters per minute. It’s great if you have water limits set in the height of summer.
Download from ThingiVerse
3D Printing Cool Item #23: Modular Wine Rack
Whether you're new to the world of wine or a connoisseur, this modular wine rack is the perfect storage solution for your fine drink. bottles of WIRA. It can be expanded (or narrowed) according to your collection by printing only the required number of modules.
Download from 3DShook
Cool thing for 3D printing #24: whistle for protection
This original design whistle is easy to make and carry. Durable and very loud. How loud? How about 118 decibels? This is more than enough to get people to hear about your emergency.
Download from ThingiVerse
3D Printable Cool Thing #25: Apple Headphone Holder
Download from ThingiVerse9
3D Printable Cool Thing #20064 Holder of an umbrella for a wheelchair
Download with Myminifactory
Cool thing for 3D printing No. 28: Protection for disk
Download from Myminifactory
Cool thing for 3D Press No. 29: form for Snow.
Download from ThingiVerse
Cool 3D Printable Item #30: Wine Bottle Protector
Download from MyMinitory50003
Cool thing for 3D printing No. 31: Pocket ashtray
download from Myminifactory
Cool Press No. 32: Roll for a glass
9000
3D Printable Cool Item #33: Apple Remote Stand
Download from MyMiniFactory
3D Printable Cool Item #34: Key Holder
Download with Myminifactory
Cool thing for 3D printing No. 35: Holder of cutlery for people with disabilities
download from Myminifactory
Curders for 3D printing No. 36: Cover wine bottle
Download from MyMiniFactory
Cool thing for 3D printing #37: Paper cup holder
download from Myminifactory
Cool thing for 3D Press No. 38: Case for blades
download from Myminifactory
Cool thing for 3D printing No. 39: Holder for a children's bottle
MyMiniFactory
3D Printable Cool Item #40: Towel Rack
Download from MyMiniFactory
3D Printable Cool Item #41: Holder for a glass
Download with Myminifactory
Cool thing for 3D Press No. 42: Holder for a phone in the shower
Download from Myminify
Twist Twist for 3D Press No. 43: Holder No. 43: Holder for beer glasses
Download from MyMiniFactory
Cool thing for 3D printing #44: MacBook Pro stand
download from Myminifactory
Cool thing for 3D printing No. 45: Protection for SD-Cart
download from Myminifactory
Cool Press No. 46: Batteries 9000 9000
Download from MyMiniFactory
3D Printable Cool Item #47: Ice Cream Cone Holder
Download from MyMiniFactory
Printable Cool Item #40064 shower set
download from Myminifactory
Cool Semi Print No.
