check out this retardation:
at 1:40 you can see him installing the driver
at 4:32 you can see him gluing the final panel of the cabinet
at first i was like - why did he install the driver in the middle of build process and not after finishing the build ?
and then i realized he literally buried the driver inside the cabinet and you can never replace it ! ! !
mind you this is a PA subwoofer - drivers in those get blown regularly - yet his design literally doesn’t allow for replacement EVER.
and it goes without saying that his acoustical alignment was never modeled and will sound like shit - i can tell just by eyeballing it and from my experience modeling horns that his alignment is all fucked. the horn is way too short. there is too much volume in the throat cavity and the transition from throat to mouth is too abrupt. there is also not enough bracing. but really the design overall is so laughably bad that even discussing it at all is a waste of time.
if you understand PA subwoofer design then you know what those guys built is literally this ( African Made Helicopter ):
this is why i tried telling idiots on other forums not to build their own PA subwoofers, because even if you aren’t as retarded as the guys in the video your design will not be fully optimized so you will end up with larger, heavier box with lower power handling than a properly optimized design.
when building a home sub you can afford to build something twice as large and heavy as it needs to be for a given performance level but PA use requires smallest, lightest possible speaker for any given performance level - and the fools in the video certainly aren’t accomplishing this. their speaker is twice the size and 3 times the weight of a JBL subwoofer of comparable performance plus additionally their subwoofer has neither DSP driver protection NOR any ability to replace the driver when it fails …
their ONLY hope here is that they are too broke to afford a real amplifier that would be able to break this driver. which is likely the case.
i mean chances are if they are DIYing this PA sub then the $300 or so they spent on the driver was all the money they had, which means their amp will also be about $300 in which case the driver actually will probably survive.
furthermore because they are broke they obviously don’t have any real system to compare this setup to which means they will actually think their creation is working great.
you’re probably thinking i dug this example up just to shit on DIYers but the sad reality is i didn’t - 90% of them are this dumb. for the most part anybody smart enough to understand how to design speakers simply buys JBL instead of making their own. just like how anybody smart enough to know how to design computers simply buys Dell. the idiots who actually build their own THINK they know but they have no idea. this is called Dunning Kruger effect. it basically means the dumber somebody is the smarter they think they are.
Dunning–Kruger effect - Wikipedia.
i fucking swear watching other people design and build speakers is like watching retards playing with their own feces, then taste them and be like " yummy ! "
the difference between an average DIY subwoofer and average African helicopter:
is that at some point the African will have to face the fact that his helicopter doesn’t fly. whereas the idiot DIYer will never understand the stupidity of what he has “accomplished” …
because everything is relative … even the worst designed 10 cubic foot subwoofer using a 18" driver will outperform the best 1 cubic foot subwoofer using 8" driver - at least in the eyes of the creator - as such 90% of DIYers who build garbage like this never come to realize what absolute trash they have built …
part of me feels guilty for mocking these retards i mean they were born this way - it’s not their fault their IQ is 80 and mine is 140 but i didn’t create this website to pretend like everything is fine
everything is NOT fine
that helicopter will not fly and that subwoofer will never be worth the cost of materials that went into it …
and check the comments … “Perfeito!” … which makes you wonder if the Nigerian with the Helicopter was also getting similar support from his comrades in his endeavor … of course i am sure he got some negative comments too but he simply deleted them from his channel … kind of like AVS forum banned me when i pointed out that they are all retards …
the sad reality is DIY Audio makes sense only in an extremely limited set of circumstances … it is easy to build a speaker and i have built many … but it is very hard to build one that makes more sense than a JBL speaker you can order from the internet …
only about one person in a million can out-design JBL just like only one person in a million can out-design Dell or Apple yet that doesn’t seem to stop anybody from trying … and in case of subwoofers people with 80 IQ seem to have the most confidence …
