http://www.adireaudio.com/Files/WooferSpeed.pdf
http://www.adireaudio.com/Files/SPLCalculations.pdf
http://www.adireaudio.com/Files/DriverOrientation.pdf
http://www.adireaudio.com/Files/GroupDelay.pdf
http://www.adireaudio.com/Files/RDOOperation.pdf
http://www.adireaudio.com/Files/CarCables.pdf
Victor...
I hope this is ok as its just posting direct links to research material on the website and not "copy/pasting".....
Replies (6)
MrBrownstone on 06/19/2007 13:09:11
you're OK to post a link, just not to copy/paste the material.
However, if the content you refer to is not applicable to your forum, the forum owner can elect to terminate your posting privileges.
Also, if the forum owner believes that the content you are referring to may be exposing his/her organization to liability, they'd be in their rights to remove your post, etc.
In any case, I highly doubt that Adire wants LESS exposure to car audio enthusiasts.
swez on 06/19/2007 13:56:21
These are very good reads for those who aspire to become loudspeaker design engineers and test techs. They also show how well Adire engineers and designers understand the various properties (That really matter) of a given speaker and how to optimize the performance of their designs.
It also shows Adire is interested in playing with all cards on the table and how many common woofer makers may/do not. (Change variables in a given test and give skewed results based on non-standard test procedures)
1. Power input variables (SPL @ 1 watt = 2.83 Volts @ 8 ohms)
2. SPL measurements at 1 meter (VS other non-standard distances)
3. Measuring SPL and/or frequency response in an anecohic chamber (VS in a box or modified enclosure)
At least Adire is stating all these variables they adhere to. This is common practice in Professional grade products and standarized/ regulated testing are a given. In Home and Mobile electronics, there are no such regulations and the Mfg can make all kinds of claims w/o being held accountable. (Brand Z says its speakers produce xxSPL @ 1 watt, but does not say anything about how that number was derived)
Anyway, this is good information for those who really dig deeper and understand how physics, magnetics, current and inductance all play a part in how well a speaker will perform. (Design engineers and techs) However, to the average reader and car audio buff, does he care about most of this? Nope! (Not one wit)
However, the RCA/CAT5 cable test results were very interesting. There have been a few posts hre about the use of CAT5 wiring in automotive signal applications. From this report, it may be sufficient for woofers, but when one is working above about 300 Hz., (Midrange and tweeters) the use of CAT5 is a very bad idea.
Again, a very good read for advanced audio guys, but not to the average boom box thumper. SMILE Thanks for the links.
Swez
jamesp on 06/19/2007 14:19:40
A company that builds high quality products should be proud of the fact and put all of thier cards on the table. Industry specs that are standardized so a consumer can compare apples to apples help us all out.
I can understand how a quality minded manufacturer could be hesitant to present all of this information when the companies designing and making lesser quality products use deceptive practices and skew data by deviating the parameters from the industy norms.Consumers that dont take the time to learn about the products of interest can easily be led to believe that a junk offering is the better value because power ratings etc. are given for higher, sometimes impossibly high voltages or from different distances, or in enclosures which are non standard then not even mention this in the product descriptions or disguise the differences.
We all caught on to the ol RMS vs Peak wattage schemes back in the 70's. There were some companies even listing total power numbers instead of power per channel. False advertising used to be considered unethical at the least and sometimes illegal. Now the ad people seem to think that the more you can fool someone into thinking a crap product is great, hey look at all the shiney stuff,the better you are at your job.
swez on 06/19/2007 16:14:55
James, you are so spot on about the last paragragh comments. Today they call this "Creative Marketing" techniques where there is more hype than substance to how a product is pitched.
Just look at the TV ads these days, much less things we read in the paper, mags or off the Internet. Unfortunately, many companies employ very creative and deceptive advertising campaigns to hawk their products. It was not like this 20 years ago. A man's word and a handshake were as good as money in the bank.
In today's feeding frenzy of ads and hype, it takes a very savvy shopper to feret out the truth from bogus claims. With the loose laws out there these days, one can practically claim anything and get away with it for a time. Sad.... very sad situation and let the buyer beware!
(Surge Caps are a very good example of hype that does not live up to the reality of these products)
Swez
PS I think this is why many older guys prefer "Old School" gear. We got more than we paid for and these products were almost bullet proof. The old school Rockford amps are a great example and am sure there are many more too.
Ash on 06/19/2007 20:28:43
That sounds more like history repeating (market wise)....... Still it helps to have a decent basic knowledge so you can read through all the bull out there and determine for yourself what products are really worth.
swez on 06/19/2007 21:37:43
History repeating itself? LOL They sold "snake oils and tonics" with all kinds of claims back in the 1800's. Now, we see a different brand of snake oil marketing, only with high tech visuals and effects.
The net effect, "there is nothing new under the sub... it's all vanity an like chasing the wind"... or was that under the "sun"? King Soloman said that over 3000 years ago and he was the wisest "man" that ever lived.
Swez SMILE
http://www.adireaudio.com/Files/SPLCalculations.pdf
http://www.adireaudio.com/Files/DriverOrientation.pdf
http://www.adireaudio.com/Files/GroupDelay.pdf
http://www.adireaudio.com/Files/RDOOperation.pdf
http://www.adireaudio.com/Files/CarCables.pdf
Victor...
I hope this is ok as its just posting direct links to research material on the website and not "copy/pasting".....
Replies (6)
MrBrownstone on 06/19/2007 13:09:11
you're OK to post a link, just not to copy/paste the material.
However, if the content you refer to is not applicable to your forum, the forum owner can elect to terminate your posting privileges.
Also, if the forum owner believes that the content you are referring to may be exposing his/her organization to liability, they'd be in their rights to remove your post, etc.
In any case, I highly doubt that Adire wants LESS exposure to car audio enthusiasts.
swez on 06/19/2007 13:56:21
These are very good reads for those who aspire to become loudspeaker design engineers and test techs. They also show how well Adire engineers and designers understand the various properties (That really matter) of a given speaker and how to optimize the performance of their designs.
It also shows Adire is interested in playing with all cards on the table and how many common woofer makers may/do not. (Change variables in a given test and give skewed results based on non-standard test procedures)
1. Power input variables (SPL @ 1 watt = 2.83 Volts @ 8 ohms)
2. SPL measurements at 1 meter (VS other non-standard distances)
3. Measuring SPL and/or frequency response in an anecohic chamber (VS in a box or modified enclosure)
At least Adire is stating all these variables they adhere to. This is common practice in Professional grade products and standarized/ regulated testing are a given. In Home and Mobile electronics, there are no such regulations and the Mfg can make all kinds of claims w/o being held accountable. (Brand Z says its speakers produce xxSPL @ 1 watt, but does not say anything about how that number was derived)
Anyway, this is good information for those who really dig deeper and understand how physics, magnetics, current and inductance all play a part in how well a speaker will perform. (Design engineers and techs) However, to the average reader and car audio buff, does he care about most of this? Nope! (Not one wit)
However, the RCA/CAT5 cable test results were very interesting. There have been a few posts hre about the use of CAT5 wiring in automotive signal applications. From this report, it may be sufficient for woofers, but when one is working above about 300 Hz., (Midrange and tweeters) the use of CAT5 is a very bad idea.
Again, a very good read for advanced audio guys, but not to the average boom box thumper. SMILE Thanks for the links.
Swez
jamesp on 06/19/2007 14:19:40
A company that builds high quality products should be proud of the fact and put all of thier cards on the table. Industry specs that are standardized so a consumer can compare apples to apples help us all out.
I can understand how a quality minded manufacturer could be hesitant to present all of this information when the companies designing and making lesser quality products use deceptive practices and skew data by deviating the parameters from the industy norms.Consumers that dont take the time to learn about the products of interest can easily be led to believe that a junk offering is the better value because power ratings etc. are given for higher, sometimes impossibly high voltages or from different distances, or in enclosures which are non standard then not even mention this in the product descriptions or disguise the differences.
We all caught on to the ol RMS vs Peak wattage schemes back in the 70's. There were some companies even listing total power numbers instead of power per channel. False advertising used to be considered unethical at the least and sometimes illegal. Now the ad people seem to think that the more you can fool someone into thinking a crap product is great, hey look at all the shiney stuff,the better you are at your job.
swez on 06/19/2007 16:14:55
James, you are so spot on about the last paragragh comments. Today they call this "Creative Marketing" techniques where there is more hype than substance to how a product is pitched.
Just look at the TV ads these days, much less things we read in the paper, mags or off the Internet. Unfortunately, many companies employ very creative and deceptive advertising campaigns to hawk their products. It was not like this 20 years ago. A man's word and a handshake were as good as money in the bank.
In today's feeding frenzy of ads and hype, it takes a very savvy shopper to feret out the truth from bogus claims. With the loose laws out there these days, one can practically claim anything and get away with it for a time. Sad.... very sad situation and let the buyer beware!
(Surge Caps are a very good example of hype that does not live up to the reality of these products)
Swez
PS I think this is why many older guys prefer "Old School" gear. We got more than we paid for and these products were almost bullet proof. The old school Rockford amps are a great example and am sure there are many more too.
Ash on 06/19/2007 20:28:43
That sounds more like history repeating (market wise)....... Still it helps to have a decent basic knowledge so you can read through all the bull out there and determine for yourself what products are really worth.
swez on 06/19/2007 21:37:43
History repeating itself? LOL They sold "snake oils and tonics" with all kinds of claims back in the 1800's. Now, we see a different brand of snake oil marketing, only with high tech visuals and effects.
The net effect, "there is nothing new under the sub... it's all vanity an like chasing the wind"... or was that under the "sun"? King Soloman said that over 3000 years ago and he was the wisest "man" that ever lived.
Swez SMILE
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