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Void V18-1000

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rich_gale View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rich_gale Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 12:31am
from what i read on here, rog has the right idea..  use the chinese cheap labour to make the individual components - without teaching them enough to use the knowledge to build the whole finished product.  then ship back the components to be assembled by professionals with more going on up top than just a mind trying to rip off the product they are paid to be making.  

are the cabs built in the uk?  china has a habit of biting you on the arse if you let them know too much about what the product is doing.  worked with many companies who have suffered the wrath of a chinese numbnut copycat learning too much about the product they are being paid  to manufacture.  A lot of the esoteric/specialist products sent to china for manufacture 5 yrs ago are now back being made in the uk, hope rog does/has done the same before he gets bitten. 
REFLEX ALL THE WAY.... (however, im playing with horns again...) That ok Mister Valiant? :)
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nomis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nomis Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 8:28am
please stop china bashing all the time.we get stuff made there for one reason-its cheaper,and hence companies can squeeze more profits from cheap labour.
its time to make more products closer to home,and big up the companies doing so.
yes,even products made closer to home can be copied,but how many people buy fake fk1 for example and really believe theyre getting the same product,how many sales do they actually loose?
frankly,slagging off people 'getting to know too much about the product they make' is an example of our attitude to others.if i made drivers all day for not much,i might get curious as to how to do it without being ripped off by my paymasters,surrounded by toxic filth whilst they proudly announce how much cleaner it is up north theese days.rant over!
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Jake_Fielder View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jake_Fielder Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 10:31am
So i was right about vas?
 
Whats the deal with higher vas? i noticed that even doubling the vas only shifts the lower impedence peak downward but doenst really do alot else. I couldnt get your link to work BTW
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levyte357 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 10:38am
Originally posted by Jake_Fielder Jake_Fielder wrote:

I couldnt get your link to work BTW


Bit strange that, was ok until I put it on SP. LOL


"Who am I? I'm the guy who does his job.. You must be the other guy".
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 2:29pm
Originally posted by nomis nomis wrote:

please stop china bashing all the time.we get stuff made there for one reason-its cheaper,and hence companies can squeeze more profits from cheap labour.
its time to make more products closer to home,and big up the companies doing so.
yes,even products made closer to home can be copied,but how many people buy fake fk1 for example and really believe theyre getting the same product,how many sales do they actually loose?
frankly,slagging off people 'getting to know too much about the product they make' is an example of our attitude to others.if i made drivers all day for not much,i might get curious as to how to do it without being ripped off by my paymasters,surrounded by toxic filth whilst they proudly announce how much cleaner it is up north theese days.rant over!


Yes we do tend to outsource a lot of manufacturing to China these days to save due to their lack of manufacturing regulations+worker protection amongst other things. It is also well known that western IP laws might as well not exist there and so if you give away too much product information then you can fully expect a competing exported product to turn up in your market at 1/3 of the price. Maybe the quality is poor compared to yours but it doesn't matter when you can't sell any units and go bust anyway.

We only shoot oursleves in the foot for these short term profit gains really, until China decides to play a level ball game then we are always going to loose the import/export battle. For example see Google pulling out of the Chinese market due to slightly less than ethical behaviour on the Chinese side, hopefully that will force some CEOs to confront a few issues.

and on topic:

Just to say good luck with your tinkering Lev, it is what the DIY ethic is all about after all. I think you may be barking up a rather expensive tree for little gain by redesigning heavy duty drivers but someone has got to have a go. I will look forward to any measurements you get to make. Out of interest do you have any maths or modelling to back your ideas up or is it based on a feeling?


Edited by odc04r - 13 January 2010 at 2:32pm
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levyte357 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2010 at 2:48pm
Originally posted by odc04r odc04r wrote:


Just to say good luck with your tinkering Lev, it is what the DIY ethic is all about after all. I think you may be barking up a rather expensive tree for little gain by redesigning heavy duty drivers but someone has got to have a go. I will look forward to any measurements you get to make. Out of interest do you have any maths or modelling to back your ideas up or is it based on a feeling?


In the quoted text,"breaking a driver in" typically results in 5-10% increase of Vas/lowering of Fs anyway, which is always desirable regarding subwoofers.

The text also quotes the maths to prove this, but after a lengthy phone conversation with  KM engineer, he told me many custom versions of drivers, simply have a slightly less impregnated spider, to  reduce stiffness.

They did warn me it would result in increased excursion, but if the driver to be modified has sufficient Motor strength and initial compliance, a small reduction in stiffness would be acoustically noticable, yet still allow driver to remain in control with slightly reduced power handling.

Have also spoken to number of Reconers, who also do this for some soundsystems, so it is more widespread than people think.Shocked
"Who am I? I'm the guy who does his job.. You must be the other guy".
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