it's really nice to see this channel achieving sucess. I remember the first few videos being so good but having so few views! contratulations and keep it up!
I was thinking about what you said on the conversion of stereo to mono from the 3.5mm jack, and I was wondering if this is because the bigger Eneby has the same board, and supports stereo? I have never seen these speakers before, however, so it was just a little thought.
Great detailed teardown, it reminds me a little of the Logitech Squeezebox Boom, which uses a very similar looking woofer, and is a stereo active system using class D amplifiers, digital crossovers, perceptual (fletcher-munson) compensation for volume and to prevent overdriving at high volume. Looks like a well thought out product.
First thank you so much for making this video , really contain a lot of useful information about the circuit design of the this speaker , the circuit of the this device reflex the simplicity of the device & the possibility to hack this device , please keep the good work
I might want to add some struts between the rear and front (says she who built her subwoofer out of 19 mm chipboard (small chips, not what you typically see in the US), probably went overboard with sealing and internal supports) and a bit more damping material but that looks surprisingly good. I just don't trust speaker walls that are that thin. :D
On the stereo mixing: the current version of the speaker (now called Vappeby -- not sure how much internals changed but it no longer has bass/treble setting :( ) does have stereo pairing option so the "master" speaker can take aux input and send it to the other speaker. I've found the option mentioned in manual for "Eneby 20 gen 2" already so it must've been something planned from the beginning and hence mixing signal in digital.
Great video! Please tear down that battery as well. Does it have a built-in charge circuit? I would love to use that thing for DIY projects. Is the connector available/standardized?
This seems like an amazing amount of technology for the price. Sometimes I look at some products like this and wonder how they can make any profit at all.
I have worked with STM32 Microcontrollers before, sooo here a few thoughts from me. they actually support flashing (and reading, but never done that) over uart instead of swd, like other ARM microcontrollers, which is really great because it reduces cost, but i doubt that you would manage to do anything with the hex file. (or atleast i havent worked really hard with assembly for a long time) I think it would be a much better idea to monitor the communication between the micro and the other chips and emulate that in a new firmware, which could be open source. I doubt it does much while its just playing audio, but rather just sets the registers of the chips when something happens (button press, bt connection, volume changed etc.) which _should_ be not that hard to copy. Dont know, maybe if i got time (and have to visit ikea again) i might give it a try, would be a really interesting project for sure.
This unit uses a class D amp design. A class D amps uses PWM of a HF carrier with output filtering to integrate the output power. It is much more efficient than AB (+95% vs 50%) , so doesn't need a heat sink and has THD
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The amp is flat but the woofer and tweeter probably are not. They may use some default equalization to flatten out the response of those.
The STM controller encrypts the code by code obfuscation on upload. So dumping the code is almost impossible but I don't think would be hard to create a code from zero if someone do a quick-draft of the outputs of controller and where it is plugged
Hello. Thank you very much for the video. Would it be possible to insert the Bluetooth controller boards from two eneby20 gen2 units to two eneby30 units to have the stereo duo conversion capabilities in the eneby30?
The stereo is not cutted from the AUX Jack input directly, simply because the left and right channels can be both differents in songs, so you just loose totally the left or the right if you remove a connector of the jack input. (like a guitar only on left channel or a drum only on right) The solution here is to mix together thoses channels to one, with the chips you presented.
I bet one of the designers also saw the possibility to use multiple speakers like a stereo pair. even though it isnt implemented it may be possible with some homebrew
Drivers are made from a company called "CGEC" which makes so many little drivers for Bluetooth speakers. Even Harman/Kardon Go Play (the first one) has CGEC drivers like the famous "Atlas" driver (my propic is actually an Atlas)
@@voltare2amstereo is phase adjusted real time or just flipped from the start? Never thought about the issues of summing, might have to revisit a resistor network sitting behind a speaker lol.
Ah, you beat me to it! Working on a mod right now...
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Using two op apps and then summing afterward means a higher input impedance than they would have gotten with a passive mixer at the input. That makes it easier to drive and thus produces better sound from devices like phones and portable audio players.
Lots of music with enhanced stereo effects will sound like crap. Some high pitch tones might be lost because of phase shifting, potentially partially canceling between R and L channels, and even high octave voices may sound dull, depending on how they have been recorded, mixed and DSP enhanced in the recording studuio. So yeah, passive mixing of the channels with resistors is very amateur.
I was at ikea and passed on this speaker because I thought $75 CAD was too much. I went across the street to Best Buy to look at their speakers. Nothing even close to the same quality and sound for less than $100. Needless to say, I went back to ikea and got it!
There are a ton of hacking options. Be glad that they didn't cut off the stereo from aux in. That way audio gets converted from the adc in stereo. You can make use of that.
Generally, I note on what I want to cover in a list, and write a script from that. Then I edit the hell out of that script until it’s concise. Kind of the opposite of how I handle podcasts actually LOL
This video was great to find. After 2-3 years of use, My Eneby 20 will not connect to anything. It simply searches but won't hook the nearest Bluetooth signal. Can this main circuit board be purchased? I suspect that's where the problem is.. or should I simply toss it and buy a new one. Up until this glitch, I've loved this Eneby speaker. I've spent hours trying to get an answer from IKEA but I think their website is designed to keep you searching until you simply give up
Could you do a tear down of the W-king D8 (or Alpatronix AX500, as they seem to be the same design). I have a D8 but haven't been able to disassemble it. The D8's have crazy bass and volume but an annoying resonance peak around B-flat 1, and it would be good to check if anything can be done about it, perhaps with acoustic filling, adding weight to/stiffening the enclosure, cutting a vent port, changing one of the internal speakers for one with different acoustic characteristics etc. to spread the resonance peak out a little.
Hi Colin, That was an excellent presentation on these two speakers from IKEA. They are sold here in the UK too. I'm a big fan of IKEA furniture - in fact I've got a couple of pieces here I've still to assemble. My experience of electrical/electronic products from IKEA has not been good and I cannot recommend them. I had the Apple HomePod on test and I really liked the product. I've now seen a similar Sony product that I would like to evaluate also.
As both the ikea and apple products are OEM produced, it's a factory in China somewhere. The apple products can even be different makers over the product life time, and seems to be very rushed at times. Sony afaik still makes their own products, but don't count on that to always be the case. But, yeah, you get what you pay for as well. Similar apple product would be $200, even if it came from the same factory. And, don't assume that it's the same maker of all IKEA electronics.
There really is no comparison between the Apple HomePod and The IKEA bluetooth speaker. For me generally speaking the best audio is stereo and that can be achieved using a pair of Bose Companion 2 speakers connected to an Apple or Samsung source. @@TotteNesh
Every time he says Eneby I hear Enoby. I watched Overly Sarcastic Productions‘s dramatic reading of My Immortal recently and I’m still getting flashbacks.
Yeah, I too spent those awkward 2 minutes figuring out the 2 center screws Also - splendid overview! 9:00 the antenna looks identical on the eneby30 (I have a video teardown on that, waaahahay cheaper production quality though) .. said antenna is rather weak Also regarding cut costing .. they could’ve also had the same board in both amps, and ... that really wouldn’t have hurt performance ... They also didn’t enable TWS ... which would have again, costed nothing
> They could've also has the same board in both amps, and it wouldn't have hurt performanceì I'm happy they cared enough and used the extra headroom to improve a feature, to be honest. What do you mean by 'enabling TWS'? Giving the user the ability to use two to play stereo?
With two cheap bluetooth transmitters from alieexpress, you could send left-channel to one Eneby and right-channel to another Eneby. All you still need is a stereo to mono cable. This way you could make a fully wireless stereo setup.
At 8:40 maybe doing the stereo to mono conversion dynamically allows the internal µC to tweak for funny connections, like mono, or a 4 pole cable like on the phones who still have a jack...
Nice "deeper dive" into this BT speaker. Mikey Likes! I wonder what the additional cost would have been for the box (minus the handle) to made out of 'their' wood? Seeing that molded plastic doesn't illicit the warm and fuzzes IMHO. I'm no tree hugger but plastic? I digress. Very COoL. Thank you for the expertly produced video. Cheers from So.Ca.USA 3rd House On the Left
The power supply is on it's own board because no one designs AC-DC supplies any more, you just pick a board/supply out of a manufactures catalog biased on specs and features you need. The same goes for those BT daughter boards, they already have FCC certs and do not require to be completely re-certified, only the standard consumer device certification. The STM32 may have its firmware locked (a feature it has) so no dumping it.... Not a big deal since the STM32 is a very well documented micro with a ton of free and open dev tools (why it's popular in consumer devices) so probably quicker to just make your own firmware from scratch than trying to reverse a dump. The Digital Audio solution is smart since it lets them do crossovers, filters, EQ and what not all in logic/software, saves a lot of parts and analog black magic wizardry.
I would guess the mixdown is analog behind the opamp. Doing it before the opamp would mean you’re basically relying on the drive amplifier of the device that it’s connected to, across the whole cable, to drive the mixing. That’s bad design if you want to be able to connect to everything, even when those devices are not designed great themselves.
AFAIK mixing the stereo non-digitally could also result in unexpected effects due to some songs having some signal components not in phase (which supposedly enhances the stereo effect) and that would result in some parts of the music being unexpectedly attenuated. Not terribly important if the speaker is a crap quality unit, but if they aim for a "quality" sound, they might want to do some DSP magic on top of it.
Hypothesis: The likely reason they have 2 op-amps at the back end of the headphone jack is they may be planning a future version on the same or very similar hardware that can take stereo from a single speaker and split the left/right channels with a second speaker over BT. Also similar reason why the BT only has a single amp on its output. They're probably planning something like the way crApple's wireless headphones work where each unit connects separately to the host device.
Ya say crApple but if it wasn't for them there wouldn't be truly wireless earbuds... Everyone thought they were stupid until they created some... Also hats off to them I've tried them and they work very well, quite difficult to sync up 2 bluetooth devices together.
Okay so the tx and rx won’t help you much with the code. It’s probably mostly used for debugging and uploading code (if it has a bootloader on it prior to being connected with tx and rx). What one could do is solder very thin wires directly to the chip and use an stlink v2 to get the binary off of it. It’s very easy actually. And after that it can be changed. You’d probably have to mess with assembler a bit to get it right, but it shouldn’t give you too much trouble.
Why don't they just directly take the I2S output of the Bluetooth module to save the analog switch and the preamp? However there still is some elegance in their approach.
They could just have just used the CRS module... and an class D amplifier. Looks like that paing qualcomm for the development platform was not in mind so they added lot of glie logic to the board. Cirrus logic have boilt in Kaliba DSPs, htey can output digital audio I2S and PCM. They can route an analog input via its internal ADC to the DSP and back to the digital audio interface. So they only needed a tiny uC for volume control (a ARM uC is just useless in that design), a class D amp and the CSR module.
Listening to this on this speaker... It's a great piece of kit.. Thanks for tearing yours down, I didn't want to break mine :D EDIT: The programming pins for the CSR bluetooth chip are also brought out... That means you can change the name of the Bluetooth device, which is nice :)
I've noticed a mistake. Looking at the TI power amp a little closer, you can see that all 4 outputs are, at the least, connected to external components. This suggests that the tweeter is being driven in BTL (bridge tied load) mode as well. There are some nice benefits from using BTL amps. The datasheet states a max output of 15W when using BTL mode, but that doesn't mean you have to use all of it. Great video otherwise.
Still though, for way less than $50 you can acquire a class D amp board w/bluetooth, four 18650's, a couple decent drivers and cheap tweeter and make a project out of learning about enclosures and crossovers.
I heard they made it in cooperation with Sonos. So that maybe explains the unbranded drivers
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I wouldn't be all that surprised of the margins on IKEA products are pretty thin in general and that they rather opt for volume. With that said though if they decide for a product they likely buy at a pretty decent volume so they can keep prices down a bit because of that too. And then there's of course things like distribution and storage and such probably being pretty efficient and having less steps than if you bought a speaker in some electronics store who bought it from some other local distributor who ordered from the brand company who maybe even ordered it from someone else ..
The amp chip can’t be reprogrammed arbitrarily, but it has a lot of functionality that can be customized - the datasheet makes for an interesting read.
This is probably the 3rd video about those speakers, their low price in comparison to the competition is great, but does it compete with the used market?, maybe especially as a new product. If you use an old speaker without bluetooth, there is a way to use a raspberry pi and make something that gives you the convenience of a bluetooth speaker. Last, those circuit boards are getting cheaper but that is due to what is happening in Shenzhen China.
I am currently building a speaker with 3inch driver, and 5 inch passive radiator, i build the radiator myself to keep cost down, and the amp is from a low power bt speaker, 93dB at 0.5 W is certainly awesome, and with the 18A battery pack (@3.7U) it's just freaking awesome, in fact it'll probably run for days... if you are interested I could upload a video of me building it, with all the spec information.
tbh mate it's a bit too ridiculous, put a bigger driver in there, maybe 2 and another passive and you'll get more decent audio quality. Don't mess up on the "run for days" bit cause there's no point having a speaker you refuse to listen to...
This is the first video I see of you. What a good teardown! As an electronics student, this is a very intresting video. Keep up the good work!
Thanks a lot into something I would normally not care to look into.
Keep up the great work!
it's really nice to see this channel achieving sucess. I remember the first few videos being so good but having so few views! contratulations and keep it up!
The only Ikea product you don't have to assamble yourself, you tear down! ;P
lol
😂
Snooze
LooooL
AEKI
Best teardown I've ever seen. Keep up the great work
I was thinking about what you said on the conversion of stereo to mono from the 3.5mm jack, and I was wondering if this is because the bigger Eneby has the same board, and supports stereo? I have never seen these speakers before, however, so it was just a little thought.
Looks like a great speaker, inside and out!
This is quite detailed. I love it
Great detailed teardown, it reminds me a little of the Logitech Squeezebox Boom, which uses a very similar looking woofer, and is a stereo active system using class D amplifiers, digital crossovers, perceptual (fletcher-munson) compensation for volume and to prevent overdriving at high volume. Looks like a well thought out product.
An extraordinary analysis ! Instantly subbed. Great content!
Excellent video, keep doing quality content.
greetings from Colombia.
I really LOVE my eneby 20 this little speaker is amaizing!
Good video fella with a good amount of info. Thanks
Excellent teardown analysis! Thank you!
First thank you so much for making this video , really contain a lot of useful information about the circuit design of the this speaker , the circuit of the this device reflex the simplicity of the device & the possibility to hack this device , please keep the good work
I might want to add some struts between the rear and front (says she who built her subwoofer out of 19 mm chipboard (small chips, not what you typically see in the US), probably went overboard with sealing and internal supports) and a bit more damping material but that looks surprisingly good. I just don't trust speaker walls that are that thin. :D
Samira Peri 👍🏽👍🏽
love you tear down/breakdown videos
I bought one today after your review and LOVE it, in fact I might buy another one its so good
On the stereo mixing: the current version of the speaker (now called Vappeby -- not sure how much internals changed but it no longer has bass/treble setting :( ) does have stereo pairing option so the "master" speaker can take aux input and send it to the other speaker. I've found the option mentioned in manual for "Eneby 20 gen 2" already so it must've been something planned from the beginning and hence mixing signal in digital.
Good detailed review. Subscribed
Best teardown video I have ever seen. Thumbed and Subscribed.
They’ve released a new version of this speaker. It now has a switch on the back to disable the auto off and Bluetooth is now v5.0
Great video!
Please tear down that battery as well. Does it have a built-in charge circuit? I would love to use that thing for DIY projects. Is the connector available/standardized?
This is the best review and explanation I have seen on UA-cam. Keep up the amazing work!
Yay more teardowns!
The drivers are made by GGEC. Its written on the bottom line. They made alot of speakers for jbl, panasonic and other brands. Also for tvs
Nice analysis, subscribed.
This seems like an amazing amount of technology for the price. Sometimes I look at some products like this and wonder how they can make any profit at all.
I guess they calculated that 99% of the Ikea speaker owners sure have a closet or two from Ikea as well 😊
If anything, that ARM0 CPU seems like *overkill* for this purpose; I'm surprised they didn't just go with a PIC or the like.
I have worked with STM32 Microcontrollers before, sooo here a few thoughts from me.
they actually support flashing (and reading, but never done that) over uart instead of swd, like other ARM microcontrollers, which is really great because it reduces cost, but i doubt that you would manage to do anything with the hex file. (or atleast i havent worked really hard with assembly for a long time)
I think it would be a much better idea to monitor the communication between the micro and the other chips and emulate that in a new firmware, which could be open source. I doubt it does much while its just playing audio, but rather just sets the registers of the chips when something happens (button press, bt connection, volume changed etc.) which _should_ be not that hard to copy.
Dont know, maybe if i got time (and have to visit ikea again) i might give it a try, would be a really interesting project for sure.
The st-link utility do a simple obfuscation by default, so it woudn't be worthy to try to dump it
@@mateusfelipecota haven't tried yet reading flash out really. well then it's to the Logic analyzer I guess.
I'll buy you a speaker if you can figure out a way to disable the autosleep feature
@@hnisseplutt thank you, but i think i might get one by myself anyway next month. Im already sorry for the warranty sticker ;)
If you fix this problem I will love you forever and tell my grandkids about you. Seriously.
For IKEA's birthday i sent them flour, eggs sugar, baking soda, butter ,chocolate,milk and instructions on how to make a cake
So the amp have 4 ch outputs? Woofer on a BTL output and tweeter is on a single channel, with one left?
Awesome video, well done.
Very cool video. I didn't know Ikea made a bluetooth speaker.
Good stuff, Colin. Would you mind addressing in one of your videos the difference between electronic and digital data?
This mobile Bluetooth speaker is amazing.
I have an old BOSE soundlink color that is broken. Could I get this speaker and put the bose driver in it? Would that improve sound or be pointless?
This unit uses a class D amp design. A class D amps uses PWM of a HF carrier with output filtering to integrate the output power. It is much more efficient than AB (+95% vs 50%) , so doesn't need a heat sink and has THD
The amp is flat but the woofer and tweeter probably are not. They may use some default equalization to flatten out the response of those.
The STM controller encrypts the code by code obfuscation on upload. So dumping the code is almost impossible but I don't think would be hard to create a code from zero if someone do a quick-draft of the outputs of controller and where it is plugged
I'm not sure how I got here but this video is really entertaining.
surprised to see that.. I mean they even put a tweeter in it unlike some other company we all know... :P
Hi, does it play more than 20 minutes, heard that the speaker goes in powersave mode in 20-30 minutes ?
M. Cruusberg it plays for hours... only goes into sleep when playing silence for 20minutes.
@@Manawyrm okay, glad to hear, now i want one 😉👍
Hello. Thank you very much for the video. Would it be possible to insert the Bluetooth controller boards from two eneby20 gen2 units to two eneby30 units to have the stereo duo conversion capabilities in the eneby30?
This looks like a great product.
The stereo is not cutted from the AUX Jack input directly, simply because the left and right channels can be both differents in songs, so you just loose totally the left or the right if you remove a connector of the jack input. (like a guitar only on left channel or a drum only on right)
The solution here is to mix together thoses channels to one, with the chips you presented.
Yep, the proper way to mix down is to use opamps, but there are lots of components just to support the aux input
@MichaelKingsfordGray french
I bet one of the designers also saw the possibility to use multiple speakers like a stereo pair. even though it isnt implemented it may be possible with some homebrew
very great info!!!
Drivers are made from a company called "CGEC" which makes so many little drivers for Bluetooth speakers. Even Harman/Kardon Go Play (the first one) has CGEC drivers like the famous "Atlas" driver (my propic is actually an Atlas)
The larger Eneby is on my watchlist, is it a separate left right channel. I'm confused about that.
if they did the mono mix down passively, maybe it wouldn't sound as good?
Sine Nomine I asked the reddit audio engineering thread about passively collapsing stereo a while back and they said it'd deliver poor results.
@@voltare2amstereo is phase adjusted real time or just flipped from the start? Never thought about the issues of summing, might have to revisit a resistor network sitting behind a speaker lol.
Ah, you beat me to it! Working on a mod right now...
Using two op apps and then summing afterward means a higher input impedance than they would have gotten with a passive mixer at the input. That makes it easier to drive and thus produces better sound from devices like phones and portable audio players.
Lots of music with enhanced stereo effects will sound like crap. Some high pitch tones might be lost because of phase shifting, potentially partially canceling between R and L channels, and even high octave voices may sound dull, depending on how they have been recorded, mixed and DSP enhanced in the recording studuio. So yeah, passive mixing of the channels with resistors is very amateur.
I was at ikea and passed on this speaker because I thought $75 CAD was too much. I went across the street to Best Buy to look at their speakers. Nothing even close to the same quality and sound for less than $100. Needless to say, I went back to ikea and got it!
Well done!
There are a ton of hacking options. Be glad that they didn't cut off the stereo from aux in. That way audio gets converted from the adc in stereo. You can make use of that.
Does the larger unit play in stereo?
Judging by the amount of capacitors and resistors near the op-amps, they are most likely active filters.
Really big Fan thanks for sharing,
HEY Colin, it's going alright thanks!
How do you speak so concisely about these topics? There's so much to cover and a lot of it is technical. Show me your ways sensei! :-)
Generally, I note on what I want to cover in a list, and write a script from that. Then I edit the hell out of that script until it’s concise. Kind of the opposite of how I handle podcasts actually LOL
There is most definitely some DSP-magic going on to make such a "bland" speaker sound good!
zapro_dk Basically every speaker of this type has some kind of DSP
@@ilpatongi Yeah. Before DSP speakers of this kind were either expensive af or just plain bad sounding.
zapro_dk Yup
I have some thoughts about where those drivers come from, and I'm not so sure... should be easy to measure, anyhow. :)
It would be stupid to convert the audio to digital unless it needs to DSP the audio.
This video was great to find. After 2-3 years of use, My Eneby 20 will not connect to anything. It simply searches but won't hook the nearest Bluetooth signal. Can this main circuit board be purchased? I suspect that's where the problem is.. or should I simply toss it and buy a new one. Up until this glitch, I've loved this Eneby speaker. I've spent hours trying to get an answer from IKEA but I think their website is designed to keep you searching until you simply give up
After watching your video, I'd to remove "proficient in electronics" from my resume. Good job!
Could you do a tear down of the W-king D8 (or Alpatronix AX500, as they seem to be the same design). I have a D8 but haven't been able to disassemble it. The D8's have crazy bass and volume but an annoying resonance peak around B-flat 1, and it would be good to check if anything can be done about it, perhaps with acoustic filling, adding weight to/stiffening the enclosure, cutting a vent port, changing one of the internal speakers for one with different acoustic characteristics etc. to spread the resonance peak out a little.
Hi Colin,
That was an excellent presentation on these two speakers from IKEA. They are sold here in the UK too. I'm a big fan of IKEA furniture - in fact I've got a couple of pieces here I've still to assemble. My experience of electrical/electronic products from IKEA has not been good and I cannot recommend them. I had the Apple HomePod on test and I really liked the product. I've now seen a similar Sony product that I would like to evaluate also.
My experience with IKEA's electronics is quite the opposite
As both the ikea and apple products are OEM produced, it's a factory in China somewhere. The apple products can even be different makers over the product life time, and seems to be very rushed at times. Sony afaik still makes their own products, but don't count on that to always be the case. But, yeah, you get what you pay for as well. Similar apple product would be $200, even if it came from the same factory. And, don't assume that it's the same maker of all IKEA electronics.
There really is no comparison between the Apple HomePod and The IKEA bluetooth speaker. For me generally speaking the best audio is stereo and that can be achieved using a pair of Bose Companion 2 speakers connected to an Apple or Samsung source. @@TotteNesh
Every time he says Eneby I hear Enoby. I watched Overly Sarcastic Productions‘s dramatic reading of My Immortal recently and I’m still getting flashbacks.
Yeah, I too spent those awkward 2 minutes figuring out the 2 center screws
Also - splendid overview!
9:00 the antenna looks identical on the eneby30 (I have a video teardown on that, waaahahay cheaper production quality though) .. said antenna is rather weak
Also regarding cut costing .. they could’ve also had the same board in both amps, and ... that really wouldn’t have hurt performance ...
They also didn’t enable TWS ... which would have again, costed nothing
> They could've also has the same board in both amps, and it wouldn't have hurt performanceì
I'm happy they cared enough and used the extra headroom to improve a feature, to be honest.
What do you mean by 'enabling TWS'? Giving the user the ability to use two to play stereo?
3.5mm jack input gives you stereo output?
With two cheap bluetooth transmitters from alieexpress, you could send left-channel to one Eneby and right-channel to another Eneby. All you still need is a stereo to mono cable.
This way you could make a fully wireless stereo setup.
good luck getting good sync
Bunnyslippers - or even better... just go and buy a PROPER stereo bluetooth speaker system. Will cost you less.
At 8:40 maybe doing the stereo to mono conversion dynamically allows the internal µC to tweak for funny connections, like mono, or a 4 pole cable like on the phones who still have a jack...
Nice "deeper dive" into this BT speaker. Mikey Likes! I wonder what the additional cost would have been for the box (minus the handle) to made out of 'their' wood? Seeing that molded plastic doesn't illicit the warm and fuzzes IMHO. I'm no tree hugger but plastic? I digress. Very COoL. Thank you for the expertly produced video. Cheers from So.Ca.USA 3rd House On the Left
The power supply is on it's own board because no one designs AC-DC supplies any more, you just pick a board/supply out of a manufactures catalog biased on specs and features you need. The same goes for those BT daughter boards, they already have FCC certs and do not require to be completely re-certified, only the standard consumer device certification. The STM32 may have its firmware locked (a feature it has) so no dumping it.... Not a big deal since the STM32 is a very well documented micro with a ton of free and open dev tools (why it's popular in consumer devices) so probably quicker to just make your own firmware from scratch than trying to reverse a dump. The Digital Audio solution is smart since it lets them do crossovers, filters, EQ and what not all in logic/software, saves a lot of parts and analog black magic wizardry.
IKEA Managements: 'Hm very good information. I learned a lot'
Is it possible to upgrade the ikea bluetooth speaker? Like better tweater/speaker, more battery life or better crossover etc?
Yes: buy something else, that suits your expectations. ;)
I would guess the mixdown is analog behind the opamp. Doing it before the opamp would mean you’re basically relying on the drive amplifier of the device that it’s connected to, across the whole cable, to drive the mixing. That’s bad design if you want to be able to connect to everything, even when those devices are not designed great themselves.
AFAIK mixing the stereo non-digitally could also result in unexpected effects due to some songs having some signal components not in phase (which supposedly enhances the stereo effect) and that would result in some parts of the music being unexpectedly attenuated. Not terribly important if the speaker is a crap quality unit, but if they aim for a "quality" sound, they might want to do some DSP magic on top of it.
Maybe the larger unit has a thicker enclosure hence the higer gain to 9dbm?
Hypothesis: The likely reason they have 2 op-amps at the back end of the headphone jack is they may be planning a future version on the same or very similar hardware that can take stereo from a single speaker and split the left/right channels with a second speaker over BT. Also similar reason why the BT only has a single amp on its output. They're probably planning something like the way crApple's wireless headphones work where each unit connects separately to the host device.
Ya say crApple but if it wasn't for them there wouldn't be truly wireless earbuds... Everyone thought they were stupid until they created some... Also hats off to them I've tried them and they work very well, quite difficult to sync up 2 bluetooth devices together.
Okay so the tx and rx won’t help you much with the code. It’s probably mostly used for debugging and uploading code (if it has a bootloader on it prior to being connected with tx and rx). What one could do is solder very thin wires directly to the chip and use an stlink v2 to get the binary off of it. It’s very easy actually. And after that it can be changed. You’d probably have to mess with assembler a bit to get it right, but it shouldn’t give you too much trouble.
Why don't they just directly take the I2S output of the Bluetooth module to save the analog switch and the preamp? However there still is some elegance in their approach.
someone already figured out a hack to disable the 20 min turn off timer. very easy to do by installing a jumper wire and cutting 1 trace.
They could just have just used the CRS module... and an class D amplifier.
Looks like that paing qualcomm for the development platform was not in mind so they added lot of glie logic to the board.
Cirrus logic have boilt in Kaliba DSPs, htey can output digital audio I2S and PCM.
They can route an analog input via its internal ADC to the DSP and back to the digital audio interface.
So they only needed a tiny uC for volume control (a ARM uC is just useless in that design), a class D amp and the CSR module.
Listening to this on this speaker... It's a great piece of kit.. Thanks for tearing yours down, I didn't want to break mine :D
EDIT: The programming pins for the CSR bluetooth chip are also brought out... That means you can change the name of the Bluetooth device, which is nice :)
We don't have any bluetooth speakers at IKEA over here in Australia which is very weird.
Eneby gen 2 now supports stereo pairing.
Should have had Bluetooth 5. The range would be insanely better.
Ikr
Henriko Magnifico it's a cheap ikea product lol
Cameron Chitra-Straley has surprisingly decent components for a cheap IKEA product.
Sybrand Botes Yeah, they shouldn't complain about bt 5.0 though, that was my point.
BT5 would have made this product unsalable because it’s not that common (yet).
I've noticed a mistake.
Looking at the TI power amp a little closer, you can see that all 4 outputs are, at the least, connected to external components. This suggests that the tweeter is being driven in BTL (bridge tied load) mode as well. There are some nice benefits from using BTL amps.
The datasheet states a max output of 15W when using BTL mode, but that doesn't mean you have to use all of it. Great video otherwise.
This is a great Bluetooth speaker for people on a budget. Wish I was in a country which actually sells this.
Where r u from? I thought Ikea sells in like all countries
@@DEMENTO01 South East Asia.
@@DEMENTO01 They haven't fully invested in my country anyway, so I still expect them to be rare to see even if they are in my country.
Same here Matt. I'm in Australia and I can't find any reference to this being in stores here. My closest store is 160km way.
Wanna see how to build one?
Still though, for way less than $50 you can acquire a class D amp board w/bluetooth, four 18650's, a couple decent drivers and cheap tweeter and make a project out of learning about enclosures and crossovers.
Can multiple units be configured for simultaneous stereo sound?
Only using the analog input: split stereo into two plugs. Bluetooth... no.
Hello! Can I use a Y splitter and combine two speakers together?
Yeb, When you use a standard mail 3,5 mm stereo cable to two female 3,5 mm mono adapters you have got a poor man 's stereo solution ((-;
It seems like Ikea may be going after some of the Bang & Olufsen market share...
I heard they made it in cooperation with Sonos. So that maybe explains the unbranded drivers
I wouldn't be all that surprised of the margins on IKEA products are pretty thin in general and that they rather opt for volume.
With that said though if they decide for a product they likely buy at a pretty decent volume so they can keep prices down a bit because of that too.
And then there's of course things like distribution and storage and such probably being pretty efficient and having less steps than if you bought a speaker in some electronics store who bought it from some other local distributor who ordered from the brand company who maybe even ordered it from someone else ..
Is it possible to reprogram the DSP for specific needs ?
The amp chip can’t be reprogrammed arbitrarily, but it has a lot of functionality that can be customized - the datasheet makes for an interesting read.
Why does a digital signal go from the AD converter to an audio amplifier?
Because the amp chip has a dac and dsp built in
This is probably the 3rd video about those speakers, their low price in comparison to the competition is great, but does it compete with the used market?, maybe especially as a new product. If you use an old speaker without bluetooth, there is a way to use a raspberry pi and make something that gives you the convenience of a bluetooth speaker. Last, those circuit boards are getting cheaper but that is due to what is happening in Shenzhen China.
What do I do if my battery is stuck
I am currently building a speaker with 3inch driver, and 5 inch passive radiator, i build the radiator myself to keep cost down, and the amp is from a low power bt speaker, 93dB at 0.5 W is certainly awesome, and with the 18A battery pack (@3.7U) it's just freaking awesome, in fact it'll probably run for days... if you are interested I could upload a video of me building it, with all the spec information.
tbh mate it's a bit too ridiculous, put a bigger driver in there, maybe 2 and another passive and you'll get more decent audio quality. Don't mess up on the "run for days" bit cause there's no point having a speaker you refuse to listen to...
I have made my own bluetooth speaker and one of the problem I ran into is high frequency noise. That is why they went digital with the audio.
I actually wanna get the board