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Post by bri1270 on Mar 5, 2006 17:55:23 GMT -7
Hi All,
I got this from Sonnie Parker's BFD site, and thought you'd all be interested. They're newer, more accurate corrections for the RS meter. Frequency on the left - correction on the right.
10 -27.00 11 -24.15 12 -21.91 13 -20.13 14 -18.61 15 -17.33 16 -16.15 17 -14.92 18 -13.85 19 -13.01 20 -12.38 21 -11.66 22 -10.79 23 -10.00 24 -9.33 25 -8.80 26 -8.41 27 -7.99 28 -7.50 29 -6.99 30 -6.50 31 -6.03 32 -5.60 33 -5.23 34 -4.89 35 -4.58 36 -4.29 37 -4.04 38 -3.83 39 -3.64 40 -3.46 41 -3.31 42 -3.16 43 -3.01 44 -2.88 45 -2.74 46 -2.60 47 -2.46 48 -2.35 49 -2.26 50 -2.21 51 -2.18 52 -2.15 53 -2.11 54 -2.04 55 -1.98 56 -1.95 57 -1.92 58 -1.88 59 -1.84 60 -1.80 61 -1.77 62 -1.73 63 -1.71 64 -1.71 65 -1.72 66 -1.70 67 -1.67 68 -1.64 69 -1.60 70 -1.56 71 -1.52 72 -1.47 73 -1.41 74 -1.34 75 -1.26 76 -1.19 77 -1.12 78 -1.07 79 -1.02 80 -0.98 81 -0.94 82 -0.89 83 -0.85 84 -0.80 85 -0.75 86 -0.71 87 -0.66 88 -0.62 89 -0.59 90 -0.55 91 -0.52 92 -0.50 93 -0.47 94 -0.43 95 -0.40 96 -0.36 97 -0.34 98 -0.32 99 -0.30 100 -0.27 101 -0.25 102 -0.23 103 -0.20 104 -0.17 105 -0.14 106 -0.11 107 -0.07 108 -0.03
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Post by sonnie on Jun 8, 2006 23:26:19 GMT -7
The above are strictly for the old analog meter.
We have tested several sets of the newer analog RS meters and compared them to other user tests against several different professionally calibrated mics. We've also tested the digital. All three have different correction values. If you use the above with the newer analog or the digital then your response measurements are going to be grossly inaccurate.
You are more than welcome to copy those others to here if you want.
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Post by jman on Jun 9, 2006 22:10:19 GMT -7
It sure throws a monkeywrench in all the previous in-room measuring I did. All of the numbers are different and they rise as the frequency drops so the actual curve is tilted about 3db from 100 down to 20hz relative to the old correction factors.
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Post by ThomasW on Jun 10, 2006 7:24:40 GMT -7
Using the RS meter is a crapshoot since it's impossible to know how accurate they are given the unit to unit variability.
The proper way to make measurements is using the Behringer ECM-8000 or Nady CM100 microphones and a mic preamp with phantom power.
Using anything less is pretty much just guessing....
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Post by chrisbee on Jun 10, 2006 10:17:29 GMT -7
Well, there goes this month's food budget. ;D
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Post by sonnie on Jul 1, 2006 7:05:37 GMT -7
I agree with Thomas on the ECM8000... I think this is an excellent mic and if you wanna be sure you are getting pretty close to accurate you can use it. You can also get it calibrated for 40 bucks (down to 10hz). It does seem that most of the corrections are pretty close to the same for it though, so you'd probably be fairly safe grabbing those.
On the RS Meters, they seem to be getting better at being consistent with these. The old models really were a crap shoot... but the newer ones seem to be much better. I've tested about 6 meters... all from different parts of the country and they all come up the same, or within a db or so. I've also seen some test done by some other guys recently and our corrections are within 1.5db of each other... both using different calibrated mics to test against. So I'd suggest it's better than it used to be, but for how long who knows.
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ken
Full Member
Posts: 187
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Post by ken on Jul 1, 2006 14:28:33 GMT -7
ok, so how do we know when the older ones finished being made and the new ones began?
l bought one last yr here in oz...dont know how long it had been in stock though..l presume there's a different model number / look about them?.......cheers Ken
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Post by sonnie on Jul 2, 2006 0:25:00 GMT -7
Well... it appears at some point in time the manufacturer got somewhat better with the old model #33-2050... but when that was, I have no idea. Of the ones we've tested they all seem to be close to the same with pretty drastic corrections needed. I do know that at one time... back in 2000-2001 there was a fellow at AVS that tested this meter with the old standard RS Correction Values that have floated around the net for years. He verified those to be accurate for his meter, which was one of these old analog models... #33-2050. However, those corrections do not work for my older model meter and niether do they for several others who purchased one of the older analogs in the last 4-5 years. For the newer analog meter model #33-4050, they all appear to be the same since they were first introduced. Pretty consistent and as far as I can tell everyone who has tested one has corrections within a db or so of each other. Slight variations could be the result of a number of variables... but we are all so close and these were all purchased at different times and from different areas. On the digital model... it's not far off from the newer analog, but slightly different. #33-2055 Again... all I've seen or know of that have been tested are very close in response. I think if you purchase the #33-4050 or the digital model, you'll be okay. But, if you wanna be absolutely sure then get a better mic.
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ken
Full Member
Posts: 187
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Post by ken on Jul 2, 2006 9:45:49 GMT -7
Thanks Sonnie, l'll check it out when l get home from work tommorow ( on night shift atm ) ......... hopefully got the newer one....cheers Ken
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