Build your own Concrete Bluetooth Speaker (how-to)

Today we'll be building a Bluetooth speaker! Visually it looks fantastic with a lovely wooden front and a concrete outer shell. This concrete not only looks great, but it helps audio quality too, as the sound produced by the speaker is very solid and confident due to the lack of resonance. Plenty of techniques will be used for this project, so sit back and enjoy!
Parts links:
Disclosure: These are affiliate links. If you click them and make a purchase from the various merchants they link to, DIY Perks may earn a commission. Affiliate programs and affiliations include, but are not limited to the eBay Partner Network and Amazon Associates.
Dayton Audio ND65 speaker drivers (US):
amzn.to/2yxNaPt
Dayton Audio ND65 speaker drivers (EU):
www.soundimports.eu/en/nd65-8...
30w Mini Amplifier (eBay US): ebay.to/2hnWZJ7
30w Mini Amplifier (eBay UK): ebay.to/2gkXRxS
Bluetooth Receiver (eBay US): ebay.to/2xRZhJK
Bluetooth Receiver (eBay UK): ebay.to/2xEDgi1
DC-DC Isolating Converter (US): ebay.to/2wpoQ1m
DC-DC Isolating Converter (UK): ebay.to/2x4FVgs
Step down voltage converter (US): ebay.to/2fFWUDp
Step down voltage converter (UK): ebay.to/2xIJ1Zp
Potentiometer (US): ebay.to/2xKaUQX
Potentiometer (UK): ebay.to/2kb9YC0
Battery Bank Tubes: ebay.to/2CsKPrC
Detailed templates: drive.google.com/file/d/0B-Wz...
Sign up to AudioBlocks here for some royalty-free goodness: audioblocks.com/DIYPerks_0917
OFFICIAL LINKS:
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Forums: diyperks.com/community/
Twitter: / diyperks

[@ryanlangan1060]

The battery mounting, that's quite clever making them a visual feature!

[@nonenone6410]

How do you recharge thoses ?

[@nonenone6410]

I found a way

[@elleetmoi3288]

@@nonenone6410 oh do tell ! how do you charge them?

[@mjb007bond]

The coolest part. Makes me want to build one all the more.

[@Derek_Read]

I have adapted many of my electronics (anything that uses 3 x AA or 3 x AAA) to use a single 18650 battery, and I have several "battery banks" that also use 18650 batteries. I have an excellent charger that handles all sorts of batteries, but my battery banks also allow for charging and removal of the 18650s (so you can easily use them elsewhere if necessary). I have tried various kinds over the past few years but these two are the best so far: Tomo Intelligent Mobile Power Model M4. A battery bank that charges 4 x 18650. Also comes in a 2 x 18650 model and a battery bank / flashlight model. Essentially this is a box with a sliding lid you can put 18650 batteries into (spring mounted). Plug it into USB to charge. It provides 2 USB outputs (1A and 2A) for charging 5V USB devices (like phones). Pujimax D4. Charges any combination of 4 of the following at once: 3.7V Li-ion -> 18650 (plus a very very long list of other similar batteries); 1.2V NiMH / Ni-CD -> AAAA, AAA, AA, A. This is just a charger for charging batteries to be used in something else. Excellent display telling you the current voltage of each battery, estimated time until 100%. It also lets you adjust the charging rate. Both of these products include circuitry that makes charging safe, so you don't really need to worry about what kind of 18650 batteries you are using. I've been using scrounged 18650s (from old laptops) in many items I've adapted that used to run on 3 x AA batteries (most devices wire AA in series when they use more than one). 1 x 18650 has about the same voltage (most of mine are about 3.7V to 4V) but last many times longer than 3 x AA (wired in series for 3.6V). You would need to remove the batteries from the tubes shown in this video to charge them in the products I've mentioned, so I would actually not bother with that setup at all (even though it seems kind of cool, non-standard battery mounts really just suck if you think about it for a second) and either use an 18650 holder (essentially a plastic case with spring mounts in it), or design the circuitry in the speaker to run directly from 5V (which almost everything here already does) and then just make space inside the cement portion for the battery bank listed above (or something similar). That battery bank could be wired temporarily to the rest of the speaker circuitry via it's USB output. Then you would just disconnect it and plug it directly into USB for charging when not in use.

[@TheloniousBonk]

I just finished making this speaker. Used a different amplifier (a cheap $15 one from banggood, with a bit less soldering), and I'm really happy with the result. Fun project! I also used a slightly bigger driver (Dayton ND91 instead of ND65), and I added the DMA90-PR passive radiators.

[@theencryptedpartition4633]

Nice! How long did it take you to build it?

[@haatdawg]

Did you use templeates? If so, how did you use them?

[@nationalnightlynews8553]

I used white cement with fine marble dust and sand.. It looks gorgeous.. Dayton audio speakers are available online, but their shipping cost is 5 times the price of the driver. So. I used peerless drivers and a made in India amplifier with inbuilt Bluetooth and aux with Bass and treble adjustment. Also has a remote control.. It sounds way better than the JBL BT I was using.. Thank you. Total spent on the build is Indian Rupees ₹3900..approx US$50.00

[@PCcardboard1354]

Please post a vid about it!

[@Zantrop64]

I know this channel is all about experimenting with new stuff, but that does sound like comments on cooking websites. "Great recipe ! I didn't have wheat flour and stock, so I used chickpeas and marmite." kind of stuff

[@germanpanzerwurfmine3718]

5:47 Me: How do you get your speaker working so well? DIY Perks: I put the circuit boards in my plants. They bless them with the power of nature.

[@archungus]

Hahahahahaha

[@I_killed_that_beard_guy]

444 likes but only two replies :(

[@TheFlyeasy68]

Lol

[@nishchaymishra8961]

Welcome to another episode of "If I had these tools."

[@ethand4784]

nobody can do any of the shit he does we don't have nice things

[@nishchaymishra8961]

@ Whoa! I am not a hater. It was just a joke saying what happens in my mind when I watch DIY videos on KZbin.

[@nishchaymishra8961]

@@mouaxiong8618 And judging by the likes on my reply, can't you think that everyone can't own garage and woodworking tools and some of the people watching these videos might even be too young for their parents to allow them to use those?

[@GMDdak2014]

@@mouaxiong8618 your mom

[@KimiEclipse]

@ you wake up on the wrong side of the bed or something?

[@Pageportal455]

A video from you means happiness, motivation, learning for me. And it makes my day.

[@nickhinckley3579]

Couldn't agree more! One of my favourite youtubers, love all your content, keep up the good work :)

[@Pageportal455]

Nick Hinckley he is the only one who does great things in a simple and easy way..!! Encouraging more and more people to come in the maker community which is really awesome..!

[@mina11237]

Honestly

[@Zrzyck]

Most of Amplifiers from links in description are with single channel mode only - there will be no stereo. Check it 2 times before ordering! For stereo you will need 10 pin version. @DIYPerks it would be better if you add similar note next to the link. I almost bought mono version :)

[@KamikazeWombat]

Excellent point, which I did not notice until I saw your comment. need to get OEP 30wx2 www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.Xoep+30wx2.TRS0&_nkw=oep+30wx2&_sacat=0

[@mistamisa7271]

This comment needs to be, pinned or up voted so every one can see it. Could catch!

[@BoboButYouCanCallMeTom]

the speakers are so close together that the stereo will have very little effect and plus because the speakers are in the same enclosure they will push each other which is bad if they both have to make different sounds

[@MikeTheSith200]

Woo! SAved me a hassle. Thanks man!

[@TheSliderW]

Yeah, could still be fixed by making a small wood separator and drilling 2 tiny resonator holes on the face plate below the 2 screws ( which I first though would be vents ). This will help provide better low frequencies as well but might be trickier to make. Trial and error with different diameter and length PVC pipes should be the way to go here since the speakers inside volume is unkown. I'd start with pipes of 1inch in diameter and move up to 3 while varying the lengths to find the optimal one. The vent hole could then be covered with fine cloth for aesthetics.

[@CheapToad]

This project is super easy, barely an inconvenience

[@alekz112]

I understood that reference.

[@cryptictriscuit207]

Ryan who

[@Siddharth-Srivastava]

Referencing Ryan is Tight!!!

[@hirwaissa6643]

Then you should get all the way off his back 😅

[@janniknoahenns4378]

@@alekz112 i understood THAT reference

[@ReverendSquibby]

This man really doesn't deserve the dislikes he gets.

[@xamanto]

OEMs need to express their hurt feelings too!

[@inderjitsingh3658]

you are soooo true

[@David-uq2uk]

Dislikes are people that are jealous as they can't do it .

[@inderjitsingh3658]

@@David-uq2uk soo true

[@anandchundi6805]

Disliked this comment too

[@Hypercube1729]

Amazing! It sounds exactly like my desktop speakers!

[@745morning]

Clever

[@MrDegsy69]

Hypercube 1729 amazing deduction! It sounds just like my computer speakers also. Do you think there is a common thread going on here? 😂😂😂

[@98SE]

@@MrDegsy69 same here it sounds the exact same as my speakers on my ARCH LINUX pc.... I USE ARCH BTW hahahaha

[@blurpfx]

@@98SE hahaha im so cool and edgy guys look at me i use ARCH LINUX!!1!!!1!

[@98SE]

@@blurpfx it was a joke lol, I use Windows 10 Enterprise LTSC 2019 and Manjaro 19 XFCE for my servers...

[@Jason-T]

Didn't even get a notification. I felt in my heart you uploaded a video.

[@longlivingdude]

Nigga please...

[@heinzkitzvelvet]

ME TOO!!!! Actually, I got the notification, but before I saw it, I woke up thinking, "I haven't seen a DIY Perks video in awhile. I wonder what's going on." That's when I powered my phone on and there it was. True story.

[@hadrihanafi2492]

same goes to me bruh

[@trinitymaple4845]

...saitama.

[@homerlandon8767]

Some suggestions for the concrete. You could have added a little more water to the mix to make the mix more fluid. Also, try adding the concrete in lifts instead and tamping the concrete with a small round nosed rod. Lastly, feel free to remove from the mold at 24 hours. You'll need to keep the concrete moist to minimize shrinkage afterwards, so keep spraying the concrete with water for a day or two afterwards. The final product should be smooth and without any of those air pockets like you have in the video.

[@royk7712]

i think the mix is good, so it can have air bubble in the surface

[@caretakerfochr3834]

I have a suggestion for the concrete myself. Use half size Besser blocks - which are hollow concrete blocks. They are something like 8x8x inches and quite heavy. They are also wayyyy cheap. Check your hardware store.

[@JerryDodge]

17:45 Very nicely done, and I could actually "hear the concrete" in a sense.

[@siriuss3894]

Those removable powerbanks....awesome concept! you always impress us viewers!

[@tronixfix]

Sohoraye Yaadhuv it looks cool but so messy and really annoying to build it like that, just add a charging port to the speaker and buy a 12,4v battery or build it yourselfe

[@TheSpotify95]

For my powerbank I'd probably just use either a pre-made Li-Po (with added protection PCB) or a load of 18650's in series, or parallel (again, with a protection PCB). I'll use a TP4056 module with protection, as well as some 18650s (or 26700s) in parallel to boost the capacity. For the 12V and 5V feeds, I'll be using boost converters. Oh, and a 5V DC-DC converter for the bluetooth module!

[@DrLoveQc]

Thoses batteries must be a pain to remove/recharge/replace I would use a lipo battery or even a SLA if bigger. Also would create 3 chambers to isolate left/right speakers and from electronics. BUT overall really nice project well done and very modern!

[@scorpion0151]

Sebastien D'Amours I was thinking the same, recharging must be a faff. Either do them one at a time or use a charger for each one, a power bank seems like it would be a better option it just won't be as pretty.

[@plumixtee3496]

12:25 "We don't make mistakes, just happy little accidents."

[@Max-oi9ge]

True

[@therealcat5794]

Isn't that bob ross?

[@existentialbaby]

@Sbe 1 no it was Bob Ross 😪😪

[@borgir7477]

Ur mom is a accident and you too!

[@smid556]

Bob ross

[@jasonsummit1885]

When you said caulk, I thought you said cork.😂 it's the accent.

[@jamestacular]

You could have heard worse...

[@mrjackson1383]

Jason Summit I’m from cork 🇨🇮🇨🇮🇨🇮

[@laviris]

Wait wot? I actually thought he said cork and now that u mentioned it in the comments i realized it wasnt lol

[@Jonnybristol100]

dictionary.cambridge.org/pronunciation/english/caulk

@@Jonnybristol100 Ty jonny english , insecurity settings so high it blocked url. Did I just get *caulk* blocked?

[@louiswhite1445]

The vision, design, execution, workmanship, and adaptability facing error- it's all simply amazing. And the power source setup is unbelievable. THAT is classy.

[@nunyabizznuss8463]

I've been watching a ton of DIY speaker building videos and I would have to say this video is one of my favorites because you explain everything and show the actual connections needed. Too many videos spend their time showing you how to build a box and leave the electronic guesswork up to the viewer. Thanks for not assuming the viewer is a engineer and explaining everything!

[@e024576]

Suggestion regarding pouring cement into molds. More than 40 years I had a job making "car size" concrete pipe using a wet cast process similar to what you're doing. We dipped a vibrating wand into the as-poured wet concrete, which really helped the concrete flow eliminating gaps and air pockets - it worked like magic! So, perhaps you could use a small rod attached to a cell phone vib motor or maybe an electric engraving tool .

[@rel66]

agreed I was thinking of a adding weight to a cheap vibrating razor i had for that, minus the razor head.

[@andyvanweyenberg]

Use a simple electric toothbrush for that; works wonders...

[@StephenNavazio]

Just thinking, could be any electric tool that has a motor. Attach a metal bar using a hose clamp to an drill (Chuck, Please don't put it in the spiny part.).

[@maxbrad60]

On a small job like this you could use something like your sheet sander without any paper on the outside of the mold.

[@billysmether6237]

Yup a palm sander would do an excellent job.

[@alexxustube]

Your skills and the quality of your builds have grown with time. This and all your project ideas make this channel so special to me. Thank you, Matt 👍✌️🙂

[@VoltageGuy2000]

Wow, one of the best videos I have seen on this matter. I really like how you used that creative design with the concrete and the way you mounted those batteries.

[@clauddora7810]

This is the most original and perfect KZbin channel ever created. I’ve learned a lot and love ur channel now

[@groundcontrolto]

Just finished building a volume knob for my record player. The case isn't going to be as fancy as this but it has given me some ideas! Just a tip on potentiometers, make sure you get a good quality logarithmic one!

[@lordbadboy]

Discovering this channel when you already reached 2.5M subs. It's so rewarding to see you've made it to this level when in this video you were just shy of 1M and seemed so excited for the upcoming. Cheers!

[@MrRwithanitch]

I’m using one of my very best pair of in ear headphones and I’m blown away how awesome the sound of this speaker sound system/project turned out.

[@Jakeyosaurus]

Always great to see a new vid from you

[@randa2290]

Jakeyosaurus i

[@tnuc748]

Noob, meet me a mage bank.

[@tnuc748]

I am... what of it?

[@chocchip4172]

1:32 I had to rewatch this 4 times, I thought it was him making the popping sound lol

[@user-du5bg4ld1m]

A perfect cartoonish pop sound 🤣

[@manuelcosta6447]

Great design and fantastic build skills, the battery module looks amazing remind an old school valve amplifier. Thanks for sharing your ideas

[@chrisembryclimbing]

Love all the different projects, especially this one. Have it in my head I am gonna build my own monitor stand, with a USB hub and now speakers built in. Thanks for the ideas and step by step walk throughs to boost confidence and competence. Keep up the amazing work.

[@IIGrayfoxII]

You can also add concrete dye to get some color you like. Red, Blue, Black, Orange?

[@bucklinspring]

Black-dyed concrete would look sick with the stained wood.

[@IIGrayfoxII]

Black concrete with Dark walnut, or even ebony.

[@JoeHardman]

I was thinking exactly the same!

[@IIGrayfoxII]

I would add multiple layers of lacquer and polish it to get a piano gloss look.

[@ClayMann]

that's interesting. I'd like it whiter. I live in an almost all white space. It's a pain in the bottom buying gadgets as I always have to have the white one or no buy hehe and often there isn't a white one.

[@berkc06]

Your projects always brilliant AF!

[@muddysledge]

This is excellent and very unique. Your tutorial is among the best. Clear explanations and professional presentation. Also thanks for the links to all of the parts. I'll be getting the amp (or a few) for some projects.

[@nnighthawk]

7:45 - Thank you so much for the tip with the B0505S. Now I can finally turn up the volume on the amplifier board to more than 50% without having tons of noise in quieter moments.

[@jajalucian]

The most beauty speaker handmade

[@MrTeff999]

The small pits in the finish look great. However, if somebody wanted a smooth finish, adding an plasticizer (such as RapidSet Flow Control) will make the concrete more liquid without adding any additional water. A few minutes of vibrating would also help.

[@AdamsLeatherWorks]

That was very fun to watch! The batteries sticking out the top really add to the cool factor.

[@satyagiet2]

Great speaker design concepts. Each & everypoint you have discussed for a good speaker design. Thanks .

[@durgeshnaukariya1823]

Hi perk , I am from India. And I love to say that you are just Awesome. I love your work keep sharing such amazing work,ideas of yours. Its worth spending time on your channel, keep doing. Thank You.

[@hhanonymous]

For your Q/A, How do you know which parts to choose and where to source them from, specifically the electronic components like this speaker? For instance, for this project were you thinking of making a Bluetooth Speaker, how did you end up choosing these components?

[@GaryLevin]

Lot's of talent here...presentation, building skills, out of the box (literally) ideas

[@antoespiga]

Man, that sounds and looks awesome. Incredible work.

[@ahsanejaz2554]

I have these speaker(not the whole system just the speaker) and they sounds so good.... plus if u r a caraudio installer or caraudiofab. then this project is easy for u...

[@JoeCastellon]

You're killing my productivity because I'm bingeing all your amazing videos. I'm blown away by your creativity, the way you explain things (which is testimony to how smart you are) and your projects are actually doable because they're often inexpensive, with incredible results!!! Thank you for sharing so much!

[@darrellbeets7758]

O M G a concrete speaker!!!!! concrete being very light, and having amazingly good accoustic properties really makes it a perfect material for a portable speaker doesnt it. great job man !!! keep it up!!!

[@aarohanyt7374]

Sarcasm at its finest

[@Dave_Tries]

You have by far the nicest finished DIY projects I have ever seen.

[@nf9844]

gosh.. love that pop sound at 1:32

[@batwommen5287]

My Question for the Q&A: What did you study in order to have so much knowledge about electronics and materials ?

[@KlaasBaas]

Google Studies

[@Noox38]

This is basicaly applied physics i'd say

[@RyanJones-lv9dj]

No offense to him, but all of his projects use surface-level electronics knowledge; he probably just watched or read some basic electronics tutorials.

[@KlaasBaas]

Ryan Jones knows what's up. Same goes for the materials.

[@AhmedSalam]

This is basic electronics level ... but the craftsmanship is on another level

[@dougb70]

the texture makes it look more hand crafted and does not diminish the look at all IMO. I might actually attempt the same, perhaps with an actual cloth. Great inspiration. Thanks for the share.

[@simisonkesibanyoni5504]

I agree, the so you call mistake is beautiful. When making mine I hope to do the same

[@Leido]

Great video as always! But it would be nice to see a fitting charger for the Power Cells and maybe even incorporating them in future projects.

[@NielsHvid]

It is indeed a very cool bluetooth speaker. But powering in with batteries for portability and then making it out of concrete seems counter productive.

[@aleksiesko885]

at least you'll know if you forgot it somewhere :D like a couple of bricks are missing from your bag

[@billburr1347]

Niels Hvid maybe it’s portable for around the home/garage/garden

[@mightress]

Niels Hvid well, the cats will not tip that one off the table for sure.

[@ambikajoshi]

I like it seems to be more of an aesthetic choice, which is not bad IMO.

[@akmalps9999]

Niels Hvid I think its for minimalistic look

[@stevebaker3691]

very cool, I like the idea of using concrete forms to make spakers.

[@williamclark9743]

Wow. Just wow. I really like what you did here and how you broke this down so a guy like me can understand. I also like how you included your mistake in here, very cool.

[@kaufmanat1]

I think I learned almost as much practical information watching this video as I did from an entire semester of my PHYS 102, freshman level physics for engineers class at college. Note, I'm not an engineer, the class was a requirement to get into Physical Therapy School. This is the type of project I really want to try, but will get to as soon as I finish the other 19 projects on my list first, assuming my wife doesn't stack anything else on the list. Still need to finish that crib in my profile picture, then finish putting up floating shelves in the baby room, then redesign the closet in the baby room, then redesign the closet in our bedroom, then install built ins for a dry bar downstairs, then install a built in upstairs as an entertainment console, then... well, you get the idea. Working 50-60 hours a week treating patients complicates things a bit more as well. If you can make a living by creating things and posting videos on youtube, my hat is off to you sir. Congratulations, you're nailing life.

[@lucianolizana446]

YOU SHOULD TRY TO MAKE AN OMNIDIRECTIONAL SPEAKER! THEY LOOK AND SOUNDS AWESOME!

[@SheepInACart]

Make the same thing without a back, rotate so the speakers are upward and, run both left and right amp channels off the left bluetooth output. Finally add some feet at the now bottom (which used to be the back) so the housing sits a decent gap from the surface below. This may not sound like a huge shift, but conceptually its very different, as instead of a stereo with closed back design where your pressurizing the housing, you are now a mono ported design that relies on the surface below for reflection. Thus its not as directional, and adjusting the height of the feet tunes the resonant frequency, rather than the chamber depth\volume. If your lazy you can even build the same thing with one speaker at the top out of a bit of rigid pipe instead of custom concrete housing, although it may not look as good unless you decorate it somehow.

[@yingyang4891]

Hi. Of course I am impressed with the content and all... How very much so could be explained by the type of a personality of a follower. And as I am, you amaze me with the skills and diligence, quality of your work etc. You to me are the point, mindset and the idea of what true DIY stands for. Everything else should be TIY or try it yourself. Thank you for sharing your projects and your mind.

[@jamesdelaplain]

Your new speakers from 2021 are so much Pristine Sounding!! Good Job!!!!!

[@Hackvlog]

One important thing about this project... 1:32, added sound effect or an actual sound? Anyway, noice!

[@shinesanthosh]

Hugatry's HackVlog It's an effect. I also noticed it

[@Kazwell96]

at the same time, kinda hard to tell due to the way the "power cell" was slowly sliding down when he set it in, and there is a tiny bit of vacuum effect. but just due to the clarity of the pop, i think it's an effect

[@marconewman7202]

No matter what, the sound was perfect😅 Good work!

[@jnevercast]

Sounds to me like the sound is natural. The tubes are vacuum since the whole chassis is very tightly sealed for sound quality reasons.

[@OniNekomon]

It's an actual sound due to air seal made in between battery and tube.

[@dangergirldesigns5943]

Those voids in the concrete could be filled with a coloured epoxy or the like to make it resemble fancy stone. There are also concrete dyes, gold leafing, & cet. You could make it look like marble, lapis lazuli, whatever. Just some crazy early morning thoughts.

[@fukkitful]

I was think the same thing. You can stain concrete with many different colors and textures.

[@tendividedbysix4835]

I love your videos, and i really appreciate your attention to detail, you're quite meticulous and I think it's awesome man thank you for sharing 😊

[@personaviva7119]

Excellent instructor, great video production quality, easy to understand and follow and very creative projects. Thanks.

[@Twister130]

Bro, you are such an amazing talented guy, God Bless you mate I like all of your videos. KEEP UP THE AMAZING WORK

[@Every_Journey_has_a_Story]

But.. if your stepdown voltage-regulator has a small potentiometer on it, make sure it is adjusted to give out the right voltage.. Mine did'nt, so i fried the bluetooth-module with 24v.. :D

[@silva69ers]

What size potentiometer did you use? He doesn't mention it and the link doesn't say

[@milestonechristianfellowsh2762]

Quite often they have a built-in trim pot with a tiny brass adjusting screw, allowing the voltage regulator to cover a range of output voltages. You don't need anything extra, Ubbe's warning is just to check/adjust the output voltage before you hook it up.

[@kamielbreyne7859]

@@silva69ers i have the same question, did you already figured out the answer?

[@chriskaprys]

​@@kamielbreyne7859 ​ Two different potentiometers to answer here: 1) [which @Ubbe Berg is referring to] On the little voltage regulator, if it deals in multiple voltages, there will be a small potentiometer that you use to dial in the appropriate voltage (a little knob or, likely, a small cross shape that you can turn with a philips screwdriver.) 2) [which you and @silva69ers are referring to] The larger potentiometer used in the build is a 50K ohm dual linear taper potentiometer switch (50KΩB). 👍 I'm still curious what the voltage of each battery cell is, as the link is broken. Must have been at least 2.4V each to reach 12V for the amplifier..

[@kamielbreyne7859]

@@chriskaprys thanks!

[@leecalladine]

this is an incredible looking speaker. brilliant

[@sakunlakdinu8027]

i really impressed the way you present these things.good luck

[@thepeacefish]

13:01 he says CAULK, not cork - I was very confused at first

[@EdOldridge]

It is caulking though not cork

[@ChrisD__]

I thought he said cork and was very confused, but then he started caulking.

[@nathanielpillar8012]

he said it just fine.

[@der-andyman]

+DIY Perks Hey, how are we supposed to charge the lithium cells?

[@ofelipediniz]

Nice question! The batteries may come with the charger, I believe in making a 2.0 version counting the charger in the circuit.

[@user-po6hn9id1t]

F August or just power it via USB

[@AndreyGarciaG]

no, you cant do that. the charger is for 5V and you need 5S lithium charger (since the video use 5S). or you could custom your battery to fit into 6S (i believe its much better).

[@superwolf95]

he spent so much between 18650 cells, old battery packs and the rest of the circuitry, at that point an integrated li-on 12V with a charging circuit and a single 12V port going outside would have been better

[@___echo___]

(rc) hobby grade battery chargers probably. Forgot what they are called

[@CraigHollabaugh]

Excellent power cell design, thanks for the video.

[@veloran]

thanks for sharing man, i love the design and the execution.

[@AmatsunoYami]

Very nice indeed

[@iTBanKG]

1:32 that pop sounded so good

[@josephsoroko7807]

This will be my second project from your other Bluetooth features Thank you!

[@100davies]

Brilliant job wit the Bluetooth speaker, good to see someone interested in electronics these days, only wish I’d had your resources when I started in the 70’s

[@AmatsunoYami]

What kind of yogurt do you like?

[@nathanricketts2415]

Fun Things are Fun frozen yogurt is where it's atttttt

[@SonOfFurzehatt]

More importantly, what kind of yoghurt DON'T you like?

[@Cornet_Tooter]

SonOfFurzehatt Bull sperm yoghurt is foul.

[@girlsdrinkfeck]

yoghurt *

[@codingneko]

I literally just asked the same thing right before seeing this comment xd

[@leonardomarcelino6527]

Great video! Can you tell how to pick the right potentiometer? I see availale potentiometers from 10k, 50k or 100k ohms. Which one did you use? Thanks!

[@nikolaja.9272]

New subscriber here: absolutely deserved! You not only entertain, you inspire and you teach. Thank you

[@matt2m]

I love it I’m going to search for your mic build because that’s just impressive

[@beaukuebodeaux8159]

you dont have to use a protected battery if you have a BMS (battery management system) board charging and monitoring them. I plan on making this but i intend to allow for a wall plug in with a BMS to charge the 18650 cells

[@MrDegsy69]

Beau Kuebodeaux thats what i would do as well as it could quickly become monotonous removing and recharging all those batteries individually everytime. A line or coaxial in dac input would be very little extra trouble also to boost sound quality in situations where the bluetooth radio portability is not required. It seems to me the hardest part about this is casting the concrete itself? I could not help but feel the addition of a plasticiser would improve the flow rate somewhat and make it behave more like plaster..

[@kiran20j]

That's a great idea. Could you please make video on how to do that please. I like to build this but I have zero knowledge about electronics. A video would be great. Thanks

[@mattl7599]

Would be awesome to have a 2020 version of this with a rechargeable battery and DC power connector.

[@carsonm6140]

One of the limiting factors for that is that USB ports are not all airtight, meaning that they aren't ideal for connecting to the interior of sealed sound enclosures like this. I would be curious to see how he would get around that (either by having the port on the outside like he does in this build or using a different connector i.e. barrel connectors)

[@sylfraeaveniore2684]

@@carsonm6140 From what most manufacturers do, they make use of a rubber covering for their charging ports. Assuming it actually prevents sound from escaping into those crevices, you'll need to accurately design your rubber cover.

[@ponyphonic]

That sound quality is incredible.

[@PCcardboard1354]

That speaker looks AMAZING!!!

[@bananasandbass]

Very neat project! Love the aesthetic :) A suggestion for the audio test: Maybe put other sound playing devices in the video to compare to, as reference. Like some smartphone and laptop speakers, and another off-the-shelf bluetooth speaker. So we know what it sounds like in comparisson to other things we might know.

Bananas and Bass, great idea. After all, we might hear sounds familiar to us like "bass". Or, sounds many are less familiar with such as the sound of a banana. I dont know what a banana sounds like. I'm ok with that, heard enough; I dont need any more. Trivia: The American produce industry term for a single banana is "finger". Think about that, next time you give someone the banana. 🖕 Namaste

[@DIYPerks]

Templates uploaded! drive.google.com/file/d/0B-WzRpdWmGhjal91SFp2Q1dXbXM/view?usp=sharing&resourcekey=0-IyYVV6VKaRQGdPbMFzI6YA

[@alexybetty12]

Thank you!

[@tmsfernandes]

Thanks!

[@filipnuzban3875]

Insta sub m8

[@DeltaEngineer]

Thank you for the templates but, the dimensions are really vague. Whats the scale of the templates? I think a few dimensions in mm or cm and especially for the acrs and angles of the mould would really help. thanks again!

[@lifeuu]

Hey mattt, Do you think you can show us a video on your work shop set up and give us a few tips on where and how we can get started with making awesome builds? Thanks you.

[@s1dd3rs1]

even the concrete templates look really cool

[@brent_miserwannabe_3thousa38]

Really cool project. Looks great. From what we heard it sounds good. After you mentioned several times how well the speakers handled bass I would of liked to hear how it truly handles thumping bass. What you referred to as "good bass" I thought was more mid-range. I really would of liked to hear how well the concrete works for true thump-tastic bass lines. Thanks for all your videos. Have seen so many really cool ideas and how they come together from your channel. Keep living that good life brother!

[@pumello]

This could probably benefit of a couple 10w tweeters. Still, very beautifully done!

[@garrygemmell5676]

We need some techno or trance to really show how well it produces bass and treble lol Top vid as usual you deserve the million subs!

[@afmcmurray27]

Absolutely Brilliant!! And hands down best over all diy speaker box

[@TheoSmith249]

I built a set of speakers out of 2 cinder blocks about 25 yrs ago. Fantastic sound.

[@qps9380]

For the Q&A, Usually, what is your budget when it comes to a DIY project?

[@nitsujeknay516]

I am about to do this build. Thank you for sharing. Would you still recommend the same speakers after 3 years or is there some better?

[@edumaker-alexgibson]

Very nice DIY industrial design, well done. Listening on my salvaged-repaired Denon RCD-M37DAB it even sounds good!

[@yacir]

Amazing DIY Camera mic, it was studio like stereo recording, neat project, indeed. Ty for sharing.

[@waterdalahoo]

28 Bluetooth speaker brand makers disliked this video xD

[@kmrfrom]

I hate KZbin for not suggesting your videos till TODAY! I HIT the subscribe button in the middle of the video what makes me/feel to do that ? 1 a very peaceful and pleasant voice 2 video captured with an art of greenery 3 you not made this video for length, its a natural flow to this length 4 I can see your happiness in mind and face after completing this project 5 I wish I could do this type of DIYs with some one like you in nearest future, just to feel the pleasure to make something on our own. I need help because i'm novice about the subject of this 6 currently I am planning to convert my wired speaker into bluetooth speaker and I may post some questions to you regarding this if the local electrician not interested to do that for me. thoroughly enjoyed your video and forgot the rest of the world! Love from India!

[@gurnam2010]

Hi Matt, excellent work on all your projects. Thanks. You could add some small aggregate and fibres to the mix, this will increase the strength of the concrete. 👍

[@Shao-wen_Wu]

You are amazing! Thanks so much for sharing. I will be trying to make one from you template for the look and sound quality.

[@crafttomake]

#QUESTION You have always been my favorite DIY youtuber and the quality is just amazing! Did you study electronics ? How long does a video of such quality usually take you to finish. And lastly, your self discipline and attention to details are so unique, Where did you get that ?

[@ngalladiouck7924]

Rachid Amantague yeah good question I want to know too

[@bradleyhinton9104]

ikr

[@user-yo1it1rw4v]

Self discipline and attention to detail can be purchased online

[@sean_tristan31]

for how much?

[@cryvengeance]

@@sean_tristan31 4 monthly payments of $9.98

[@shawnyang9379]

The link for the battery bank tubes don’t work

[@YardmanRich]

It’s crazy home humble this guy is #StayHumble my brother

[@Gadgetman59]

I've only recently 'discovered' you're channel...I was IMMEDIATELY bro-smitten! Please keep up the content...I LOVE it!