homemade twitter

EEVblog #1076 - KRK Textile Dome Tweeter Teardown

hi someone wanted to take a look at this,I ki k TW t ke triple o1 - tweeter from,the Rocio six that I've got and this one,failed you to the black a gunk of death,and I thought we'd just take a look,inside it let's go,if we take off the soft dome outer there,it's just glued on easy to peel off it,looks like we got some some foam inside,here that's just stuck on to the magnet,inside there anyway it looks like it's,got the coil on the outside which on,this one is blowing so oh look we've got,our coil on the outside so this is a,moving coil one Jesus that's not mini -,oh no is that just like one that's just,a connecting no is that it that's it wow,that's the entire coil are you kidding,me Wow,looks like it's just one big solid turn,around there that's that's crazy so,let's have a squiz at this under the,Tigana microscope here we go here's the,wire coming in and what I know sorry,that looked like one wire strip you,probably saw that on HD it didn't make,er didn't make sense at all but once you,get under there it's obviously moldable,turns you just need X amount of,magnification but it's like right up the,top that magnet so how many turns out,and I count the turns in there so,somewhere in this it's been blowing so,let's check around there,yeah well yeah I don't know where it's,blown but anyway um so there's like ten,turns or something on that there's some,foam on top which I don't know what it,actually does doesn't do anything,presumably or is that uh no there we go,it's covering it's covering a hole in,there sorry I'm getting a bit medieval,on the TAS but it is blowing,it's not something you to repair really,I wouldn't go in there and uh but anyway,we'll go down meeting it in the middle,so a screw right down no there wouldn't,be a screw,is there anything right down in there,Bueller Bueller,anyway that's very different to what I,expected to see then what if I try and,take off all this tape around here maybe,this parts glued on so it looks like we,can get around the edge there and break,that seal so it looks like this whole,thing comes apart as assembly but,there's some glue on there so let me try,and get all that out first so I haven't,actually been able to get that open any,further so sorry it's not that hugely,interesting and it basically just came,down to um it blew the I sent out of the,coil yeah okay you can probably rewind,your own coil yeah go for it but yeah,that thing's just cactus you're better,off just paying your 30 bucks or,whatever for a new one especially the,massive excursions that went on this it,would have just deformed all of the coil,stuffs so I couldn't actually get that,apart any further but obviously I just,believe that's a just a like a permanent,magnet assembly that the coil goes,through now I think what is happening,here is because well the coil just,obviously it's a moving coil design it,moves within the magnetic field in there,now it's completely destroyed and,distorted now of course but I believe,how it works is that you can see some,glue on the back of there like there's,the glue around this edge here which,actually connects which glues onto the,top of there but then I believe,that we didn't see in the teardown,because it was all torn off that the,coil was actually glued on to the,textile dome or what you know I believe,they're usually called like a textile,dome and that is what is causes this,thing to tweet um it's physically,attached this textile dome very close to,the outer rim so that's really,interesting but it's high-frequency,stuff but I felt massive excursions on,this thing so this thing was just going,thump thump thump so obviously you know,the first time it did that it probably,just sheared away from the tweeter even,if the coil was are still intact the,first time I powered it up it you know,it wasn't gonna acoustically work,anymore so that is yeah that's totally,cactus but there you go that's inside,one of these textile dome tweeters and I,don't know I expected something fancier,than that but anyway that's pretty much,all there is to it coil attached it's,sort of fairly rigidly attached to the,outer rim of that textile dome,fascinating with a big-ass magnet behind,it so there's obviously going to be very,little excursion in that but that's not,what you expect that's what woofers are,for not these little poor little,tweeters this one is abused so anyway,it's surprisingly simple but you know,there's a lot of engineering and testing,that you know and performance validation,that goes into these sorts of things so,I've no doubt it's a fairly decent,textile dome tweeter in terms of,response and performance and all that,sort of stuff it's not top-shelf stuff,but anyway there you go I hope you found,that interesting if you did please give,it a big thumb up thumbs up there we go,as always discuss down below catch you,next time

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