Hey gang, I've just been looking at Andu's results from the Sydney Caadb event and he ran a 145.7dB.
Looking at hig dB Drag racing results from the SummerNats he ran a 146.8.
I was under the impression that the new system reads down by up to 4 or so dB.
Has any other competitors at the Sydney meet found that they are only about 1 dB down on the new vs. old Termlab system?
Or has Andu made some changes to his system to jump that 3dB difference??
cya,
Timmy
[ March 17, 2003, 20:01: Message edited by: hardon ]
Full Version: New Termlab system and CAADB competition readings
i think that the higher the spl the bigger the difference will be as i usually hit 157 on the QLD system and hit 151 on the termlab system.
we have made changes to the box since summernats
on the doran meter the current box is reading 152.4db
so there is a huge difference..
on the doran meter the current box is reading 152.4db
so there is a huge difference..
quote:
Originally posted by hardon:
[b]Hey gang, I've just been looking at Andu's results from the Sydney Caadb event and he ran a 145.7dB.
Looking at hig dB Drag racing results from the SummerNats he ran a 146.8.
I was under the impression that the new system reads down by up to 4 or so dB.
Has any other competitors at the Sydney meet found that they are only about 1 dB down on the new vs. old Termlab system?
Or has Andu made some changes to his system to jump that 3dB difference??
cya,
Timmy
but only time will tell.
On SCR's TermPro @ FB we hit 141dB running:
- 1 Magma12
- 1 California 1200C amp (1x 600WRMS)
On CAA's TermPro.Net @ GLO we hit 141dB running:
- 2 Magma12
- 1 Schneider Quantum (2x 560WRMS)
Double the cone area, ~double the amp power, triple the current flow from battery, 0g instead of 4g... Yeah, the meters read almost identical
I'd hazard a guess of 6dB down on my local shops AudioControl meter.. which we'll be hitting as soon as they can give us 5 minutes meter time.
- 1 Magma12
- 1 California 1200C amp (1x 600WRMS)
On CAA's TermPro.Net @ GLO we hit 141dB running:
- 2 Magma12
- 1 Schneider Quantum (2x 560WRMS)
Double the cone area, ~double the amp power, triple the current flow from battery, 0g instead of 4g... Yeah, the meters read almost identical
I'd hazard a guess of 6dB down on my local shops AudioControl meter.. which we'll be hitting as soon as they can give us 5 minutes meter time.
Wasn't incar saying that Tony Doran's vehicle was hitting 160dB?
I see it hit 155dB on the new set up..
I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
But what were the weather conditions like on the day also? cause that can have abit to do with it also. I know at Final Battle everyone was reading low cause of the heat, and all cars were parked in the sun.
I see it hit 155dB on the new set up..
I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
But what were the weather conditions like on the day also? cause that can have abit to do with it also. I know at Final Battle everyone was reading low cause of the heat, and all cars were parked in the sun.
QUOTE
Originally posted by icebreaker:
Wasn't incar saying that Tony Doran's vehicle was hitting 160dB?
i think andu worked it out to be a 6.1db differece from the Doran meter to the new Termlab.Wasn't incar saying that Tony Doran's vehicle was hitting 160dB?
QUOTE
Originally posted by icebreaker:
I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
why would this be the case? just curious as to why this would be so..I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
Thanks,
Glenn
QUOTE
Originally posted by [S]Leekism:
i think andu worked it out to be a 6.1db differece from the Doran meter to the new Termlab.quote:
Originally posted by icebreaker:
[b]Wasn't incar saying that Tony Doran's vehicle was hitting 160dB?
QUOTE
Originally posted by icebreaker:
I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
why would this be the case? just curious as to why this would be so..I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
Thanks,
Glenn[/b]
Doran vs. CAAdB
Tony's Surf 161.5db - 155.4db = 6.1db
My car 152.4db - 146.3db = 6.1db
But I agree with Icebreaker... the difference should be greater at higher SPL levels, and has been graphed next to each other to do exactly that by Wayne Harris in initial testing... but I think it would be pretty fair to say that there is about 6db difference.
I did up a little compilation chart from various members of the TermPro Forums and as ppl have said, the louder you go the greater the diparity between the SPL scores from the old system to the new...
From 130-150dB it's about 2-3dB
From 150-160dB it's about 3-4dB
From 160-170+ it's about 4-6dB
APPROXIMATELY, and those are off of a freshly calibrated metre (old type) running simultaneously in the same vehicle along with the new TermPro metre...
From 130-150dB it's about 2-3dB
From 150-160dB it's about 3-4dB
From 160-170+ it's about 4-6dB
APPROXIMATELY, and those are off of a freshly calibrated metre (old type) running simultaneously in the same vehicle along with the new TermPro metre...
here is a graph of the numbers from testing the new mic in the rileys ss5-8 van earlier this year.
Yep, there is definately a 5-6dB difference between old and new. BUT, is there that much of a difference in aust?
We worked out our MCS meter to be about 4dB higher than the old TermPro at Final battle 2002. If so, then Kramy should be hitting 153 on that mic. Then the new termpro is supposed to be 5-6dB down on that! So therefore he should be hitting 147-148 on the new meter, but he did a 151...
Interesting...
We worked out our MCS meter to be about 4dB higher than the old TermPro at Final battle 2002. If so, then Kramy should be hitting 153 on that mic. Then the new termpro is supposed to be 5-6dB down on that! So therefore he should be hitting 147-148 on the new meter, but he did a 151...
Interesting...
Icebreaker is right:
With one Magma12 during setting up of the software on Saturday, I got 134.3dB
About three weeks beforehand I got 136.3 on Doran's meter with an identical setup.
Well that's what I thought!?! I just checked te Doran sheet and it says I got 138.0???
Mr_Bob might be able to help us out with this one as he also tested his Brahma the same day I did @ Doran's.
With one Magma12 during setting up of the software on Saturday, I got 134.3dB
About three weeks beforehand I got 136.3 on Doran's meter with an identical setup.
Well that's what I thought!?! I just checked te Doran sheet and it says I got 138.0???
Mr_Bob might be able to help us out with this one as he also tested his Brahma the same day I did @ Doran's.
Rich, yes and no,
i hit 136 @doran
then (at the same frequency) hit 137.3 at Autoexpo.
i did, however, quadruple the input power (+6db)
and wiring in parallel is meant to add to the sensitivity, so i should have been over 6db up,
so by my calcs, if the meter was 6db down in my region, it makes sense to me.
i was however having serious fuse problems,and wasn't sending much more than 100A to the sub amp at any given time, so maybe i wasn't running off quadruple power, maybe only double.
i don't think that i can be used as a fair comparison between mics, because of all the changes to my system between readings..
i hit 136 @doran
then (at the same frequency) hit 137.3 at Autoexpo.
i did, however, quadruple the input power (+6db)
and wiring in parallel is meant to add to the sensitivity, so i should have been over 6db up,
so by my calcs, if the meter was 6db down in my region, it makes sense to me.
i was however having serious fuse problems,and wasn't sending much more than 100A to the sub amp at any given time, so maybe i wasn't running off quadruple power, maybe only double.
i don't think that i can be used as a fair comparison between mics, because of all the changes to my system between readings..
QUOTE
Originally posted by [S]Leekism:
why would this be the case? just curious as to why this would be so..quote:
Originally posted by icebreaker:
[b]I think you'll find it's a case of the higher the readings the bigger the difference, and 150dB+ is prob the range were your going to see bigger differences. below 150 it's prob only 1-3dB lower.
[/b]
the difference between 2 setups will be proportional rather than linear/constant. so it makes sense that the discepancy will be greater as you go up the scale.
QUOTE
Originally posted by Bodyjar:
Yep, there is definately a 5-6dB difference between old and new. BUT, is there that much of a difference in aust?
We worked out our MCS meter to be about 4dB higher than the old TermPro at Final battle 2002. If so, then Kramy should be hitting 153 on that mic. Then the new termpro is supposed to be 5-6dB down on that! So therefore he should be hitting 147-148 on the new meter, but he did a 151...
Interesting...
whos car are you refering to when you say you worked out the difference between MCS and FB02?
Yep, there is definately a 5-6dB difference between old and new. BUT, is there that much of a difference in aust?
We worked out our MCS meter to be about 4dB higher than the old TermPro at Final battle 2002. If so, then Kramy should be hitting 153 on that mic. Then the new termpro is supposed to be 5-6dB down on that! So therefore he should be hitting 147-148 on the new meter, but he did a 151...
Interesting...
I haven't made a single change to my car so I'll let you all know what the difference is after this weekends Epping event.
I'll be able to tell the difference to within half of a dB. (referenced at 151.5-151.9 on the old meter)
I'll be able to tell the difference to within half of a dB. (referenced at 151.5-151.9 on the old meter)
that would be my white van with 6 15inch crossfire subs. which is longer doing the spl rounds.
QUOTE
Originally posted by Kramy:
that would be my white van with 6 15inch crossfire subs. which is longer doing the spl rounds.
ok cool
that would be my white van with 6 15inch crossfire subs. which is longer doing the spl rounds.
I dont think we made a comparison with MCS and FB02. Kramy's van was used to compare MCS and new termpro though...
My reference for FB02 and up here was that Andu hit within 0.5dB of the meter I took down with me on the FB02 meter. The meter I used reads 5dB lower than Custom Image meter. Which is about 1.5dB above MCS, and 3.5dB above Northfield...
My reference for FB02 and up here was that Andu hit within 0.5dB of the meter I took down with me on the FB02 meter. The meter I used reads 5dB lower than Custom Image meter. Which is about 1.5dB above MCS, and 3.5dB above Northfield...
QUOTE
Originally posted by Bodyjar:
I dont think we made a comparison with MCS and FB02. Kramy's van was used to compare MCS and new termpro though...
My reference for FB02 and up here was that Andu hit within 0.5dB of the meter I took down with me on the FB02 meter. The meter I used reads 5dB lower than Custom Image meter. Which is about 1.5dB above MCS, and 3.5dB above Northfield...
depends what day you use it lol
I dont think we made a comparison with MCS and FB02. Kramy's van was used to compare MCS and new termpro though...
My reference for FB02 and up here was that Andu hit within 0.5dB of the meter I took down with me on the FB02 meter. The meter I used reads 5dB lower than Custom Image meter. Which is about 1.5dB above MCS, and 3.5dB above Northfield...
Andrew's Civic never made over 157 with the old set-up on the MCS meter. His best was 157.7 on Northfields. He went on to take SPL KING 2001 with a best or 156.9 on the old Term Pro.
How do you expain that?
Phil
How do you expain that?
Phil
I don't wish to get into this argument again phil
we have had this discussion and you changed his setup if i remember right.
ether way meters are like dynos. not all read the same depending on various variables (incl calibration, whos been fiddeling with the gain on the mic, etc)
tested on the same day same gear same voltage same lucky red undies is the best way to compare a meter.
ether way meters are like dynos. not all read the same depending on various variables (incl calibration, whos been fiddeling with the gain on the mic, etc)
tested on the same day same gear same voltage same lucky red undies is the best way to compare a meter.
Well guys - after a long and draing day at the Epping CAADB event I can now give you the differences from my perspective:
Old system - 151.9, 51Hz
New system - 147.8, 53Hz
I found that the incar tuning still hit at 51 Hz, but the maximum SPL was measured at 53Hz - so that may get a few people thinking about tuning and what the microphone reads best.
Old system - 151.9, 51Hz
New system - 147.8, 53Hz
I found that the incar tuning still hit at 51 Hz, but the maximum SPL was measured at 53Hz - so that may get a few people thinking about tuning and what the microphone reads best.
QUOTE
Originally posted by hardon:
Well guys - after a long and draing day at the Epping CAADB event I can now give you the differences from my perspective:
Old system - 151.9, 51Hz
New system - 147.8, 53Hz
I found that the incar tuning still hit at 51 Hz, but the maximum SPL was measured at 53Hz - so that may get a few people thinking about tuning and what the microphone reads best.
interesting! 3.9db difference! I was expecting only ~3db. So 146.3 + 3.9 = 150.2? damn still 0.1db behind that record of Cameron Eames set a year ago @ SAS 02 lol
Well guys - after a long and draing day at the Epping CAADB event I can now give you the differences from my perspective:
Old system - 151.9, 51Hz
New system - 147.8, 53Hz
I found that the incar tuning still hit at 51 Hz, but the maximum SPL was measured at 53Hz - so that may get a few people thinking about tuning and what the microphone reads best.
but with the difference in scores that we are seeing how can old scores be still official scores seeing as the meters run harder?
QUOTE
Originally posted by Kramy:
but with the difference in scores that we are seeing how can old scores be still official scores seeing as the meters run harder?
thats why records in most comp series are reset each year as rule changes/metering changes make old records redundant.
but with the difference in scores that we are seeing how can old scores be still official scores seeing as the meters run harder?
Yeah but the old scores are in the DBDRAGRACING format, CAADB has only had two events - you have to compare apples for apples with the old vs new
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