Go Back   Team-BHP > Under the Hood > In-Car Entertainment


Reply
 
Thread Tools Search this Thread
Old 29th August 2007, 10:51   #46
BHPian
 
clipto333's Avatar
 
Join Date: Dec 2006
Location: jalandhar
Posts: 912
Thanked: 5 Times
Default

i think gunman or JB will confirm the way HERTZ calculates sensitivity.

if its measured the way B&T has explained, then i think its better to calculate it yourself from the T/S specs.

cheers
clip
clipto333 is offline   Reply With Quote
Old 29th August 2007, 11:23   #47
BHPian
 
zucchero's Avatar
 
Join Date: Sep 2006
Location: faridabad/rourkela
Posts: 250
Thanked: 0 Times
Default

ok lbm,i agreed that my theory is 100% wrong.in other words you mean to say that there is absolutely no such theory and no manufacturer has ever taken a 8 ohm driver with a 2.83v signal and measure it at a sistance of 1 meter.!!!!!!
in other words this is GREATEST MYTH in audio world and such nuisance practise has never been done till date by anyone.
zucchero is offline   Reply With Quote
Old 29th August 2007, 11:35   #48
Senior - BHPian
 
Bass&Trouble's Avatar
 
Join Date: Mar 2006
Location: Bombay
Posts: 2,744
Thanked: 71 Times
Default

They are two different approaches by different companies. Nothing wrong with that. Most companies feed the standard 2.83 V to speakers while measuring, irrespective of the impedance of the driver being plotted. There is usually a footnote which indicates the test conditions for the measured sensitivity. This same sensitivity is sometimes published without mentioning the conditions. If I'm not mistaken, even Illusion Audio sensitivities are mentioned at 2.83 V, and not 1 watt @ 4ohms.

Although different sensitivities do make an audible difference, unless you really cannot afford additional amplification, I dont think we should all be very worried about sensitivity unless you have a Stroker Pro 12 which is 82dB, I think. lol. Or I remember an old speaker with a 1 ohm nominal impedance, that had a sensitivity in the 70s. Cant remember the name, started with 'A'. Navin should recall.

Last edited by Bass&Trouble : 29th August 2007 at 11:37.
Bass&Trouble is offline   Reply With Quote
Old 29th August 2007, 11:35   #49
Senior - BHPian
 
Join Date: Mar 2006
Location: Faridabad
Posts: 6,814
Thanked: 294 Times
Default

Quote:
Originally Posted by zucchero View Post
ok lbm,i agreed that my theory is 100% wrong.in other words you mean to say that there is absolutely no such theory and no manufacturer has ever taken a 8 ohm driver with a 2.83v signal and measure it at a sistance of 1 meter.!!!!!!
in other words this is GREATEST MYTH in audio world and such nuisance practise has never been done till date by anyone.
Hmm what I said is that the method done by the manufacture is right but can a end user can do it..What the end user has in hand is the specs of the sub and the formula which is correct and one can compare two different drivers and see what is the real picture.
low_bass_makker is offline   Reply With Quote
Old 29th August 2007, 11:35   #50
BHPian
 
Autophile's Avatar
 
Join Date: Sep 2005
Location: New Delhi
Posts: 930
Thanked: 0 Times
Default

LBM,

This discussion has been done before extensively in another thread and if you remember I told you that the manufacturer measure sensitivity of a driver in a closed and controlled environment called "anechoic chamber" not by calculating from other parameters using formula.

Stop judging any drivers capability on the basis of sensitivity figures as it does not affect sound quality at all. At the end sound quality is what matters.

Last edited by Autophile : 29th August 2007 at 11:38.
Autophile is offline   Reply With Quote
Old 29th August 2007, 11:37   #51
Senior - BHPian
 
panky12345's Avatar
 
Join Date: Mar 2006
Location: New Delhi
Posts: 2,652
Thanked: 126 Times
Default

Hah! another technical battle that makes me learn the 25% of it. (no science background naa!)
panky12345 is offline   Reply With Quote
Old 29th August 2007, 12:13   #52
Senior - BHPian
 
Join Date: Mar 2006
Location: Faridabad
Posts: 6,814
Thanked: 294 Times
Default

Quote:
Originally Posted by Autophile View Post
LBM,

This discussion has been done before extensively in another thread and if you remember I told you that the manufacturer measure sensitivity of a driver in a closed and controlled environment called "anechoic chamber" not by calculating from other parameters using formula.
It means the formula I quoted is wrong and incorrect way to compare two different drivers sensitivity

Quote:
Originally Posted by Autophile

Stop judging any drivers capability on the basis of sensitivity figures as it does not affect sound quality at all. At the end sound quality is what matters.
When and where did I said that sensitivity will effect SQ. So stick to the topic of sensitivity.
low_bass_makker is offline   Reply With Quote
Old 29th August 2007, 12:26   #53
BHPian
 
Autophile's Avatar
 
Join Date: Sep 2005
Location: New Delhi
Posts: 930
Thanked: 0 Times
Default

Quote:
Originally Posted by low_bass_makker View Post
It means the formula I quoted is wrong and incorrect way to compare two different drivers sensitivity
I never said that formula is wrong. It is generic formula and hence cannot be used to calculate sensitivity figure accurately when manufacturers are using different styles, parameters and figures to measure sensitivity of a driver.


Quote:
Originally Posted by low_bass_makker View Post
When and where did I said that sensitivity will effect SQ. So stick to the topic of sensitivity.
The topic is about Image Dynamics subwoofer not about sensitivity figures and ways to measure it.
Autophile is offline   Reply With Quote
Old 29th August 2007, 12:40   #54
Senior - BHPian
 
Join Date: Mar 2006
Location: Faridabad
Posts: 6,814
Thanked: 294 Times
Default

Quote:
Originally Posted by Autophile View Post
I never said that formula is wrong. It is generic formula and hence cannot be used to calculate sensitivity figure accurately when manufacturers are using different styles, parameters and figures to measure sensitivity of a driver.
So if the formula is correct then it will stand true if we have to compare two drivers.
low_bass_makker is offline   Reply With Quote
Old 29th August 2007, 12:50   #55
Distinguished - BHPian
 
Sam Kapasi's Avatar
 
Join Date: Jul 2005
Location: Mumbai (but wat
Posts: 6,989
Thanked: 1,452 Times
Default

I am really enjoying this sensitivity discussion. But please boys, let us not get sarcastic or personal. OK? OK.
Sam Kapasi is offline   Reply With Quote
Old 29th August 2007, 12:53   #56
Senior - BHPian
 
iraghava's Avatar
 
Join Date: Oct 2005
Location: Bhaiyyaland
Posts: 8,028
Thanked: 153 Times
Default

Quote:
Originally Posted by Sam Kapasi View Post
OK? OK.
Wow! Sam asks & even answers his own question himself
iraghava is offline   Reply With Quote
Old 29th August 2007, 13:14   #57
Team-BHP Support
 
navin's Avatar
 
Join Date: Mar 2004
Location: mumbai
Posts: 22,505
Thanked: 3,882 Times
Default

I guess it is more than just the subwoofers that are sensitive! :-)
navin is offline   Reply With Quote
Old 29th August 2007, 13:30   #58
BANNED
 
Join Date: Mar 2006
Location: India
Posts: 4,346
Thanked: 16 Times
Default

I like things when they get sensitive.

Guys! This was very nicely discussed earlier as far as I remember. But these discussions are always good because it will benefit people like us. And that is what makes this forum so good place to be.
speedzak is offline   Reply With Quote
Old 29th August 2007, 13:36   #59
Senior - BHPian
 
panky12345's Avatar
 
Join Date: Mar 2006
Location: New Delhi
Posts: 2,652
Thanked: 126 Times
Default

Quote:
Originally Posted by low_bass_makker View Post
So if the formula is correct then it will stand true if we have to compare two drivers.
Bhai mere, from a layman point of view....authophile says that the formula is correct, difference lies is the controlled environment.

just like ford fiesta gives 32kmpl in some other conditions (controlled environment) and while daily use it doesnt return more than 13-14 kmpl. FE calculation formula remains similar, difference is in the environments that account for the difference.
panky12345 is offline   Reply With Quote
Old 29th August 2007, 14:13   #60
Senior - BHPian
 
Bass&Trouble's Avatar
 
Join Date: Mar 2006
Location: Bombay
Posts: 2,744
Thanked: 71 Times
Default

Quote:
Originally Posted by panky12345 View Post
Bhai mere, from a layman point of view....authophile says that the formula is correct, difference lies is the controlled environment.
Arre mere Katti Bhai! LBM is not talking about environment at all. It is assumed that all measurements are taken in anechoic chamber only. He is just debating that some apply higher wattage while measurement, or lower distance (less practical).
Bass&Trouble is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
ground zero Sub vs image dynamics Sub rohanGT In-Car Entertainment 105 29th March 2009 05:01
For sale: Image Dynamics ID10d2 V.3 with enclosure ScarySkulls Shifting gears 3 6th October 2007 00:07
GOT ME A Image Dynamics IDQ 10 inch!!!! sk456 In-Car Entertainment 26 25th July 2006 14:40
My New Image Dynamics IDQ 12.v2 Pics Tool In-Car Entertainment 58 20th June 2006 13:43


All times are GMT +5.5. The time now is 02:32.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks