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| REW Forum My Hsu VTF-2 graphsDiscuss My Hsu VTF-2 graphs in the Equalization | Calibration forum; My Hsu VTF-2 graphs First off, a thank you to everyone here at the shack. This is awesome stuff and the price is right. ... |
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Views: 1554 - Replies: 32
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| My Hsu VTF-2 graphs First off, a thank you to everyone here at the shack. This is awesome stuff and the price is right. Nice job with the help files and guide, no problems here using a RS. I have an ecm8000 too and I was able to use both mics and got similar results. OK, so here's my first measurement with REW. This is a Hsu VTF-2 with ports plugged. I've got this in a small room (15x8x10ft). The room is treated with nine 4x2 ft 4" ocf 3.0 fiberglass panels. ![]() So how's this looking? What about that hole at 45hz? That's a pretty big gap from 45 to 70. | ||||
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| Re: My Hsu VTF-2 graphs Quote:
Could you tell us which RS meter model you have and its serial number? I don't know if you've read this thread or not, but we are trying to establish when RS changed their meter response. Can you also tell us which calibration files you had loaded for the ECM8000 and the RS meter? Quote:
brucek | ||||||
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| | #3 | ||||
| Re: My Hsu VTF-2 graphs I bought the RS SPL about two years ago. It's an Analog V2, 33-4050. On the calibration files I used newrsanalog.cal for the rs and 'Mic Cal typ Behr ECM8000.cal' that came with trueRTA. In the graph below, the green is the RS and the other two are ECM8000. ![]() | ||||
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| | #4 | ||||
| Re: My Hsu VTF-2 graphs Perfect, the RS meter and ECM look very close (they only need +/- trace offset to match). Exactly what we hoped for. Now if you could tell me the serial number inside the battery case. It will be something like Q.C 12A05 TEC brucek | ||||
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| | #5 | |||||
| Re: My Hsu VTF-2 graphs Quote:
Thanks... and welcome to the Shack! | |||||
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| | #6 | ||||
| Re: My Hsu VTF-2 graphs Is this post or pre calibration? I am getting ready to calibration my VTF2.3 and am hoping I can get between 20-80hz with +/- 3dB. Is such a result possible? Currently I have a peak of about +4db at 25hz and +12dB around 30hz which I hope to be able to flatten out. Thanks. | ||||
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| | #7 | |||||
| Re: My Hsu VTF-2 graphs Quote:
![]() brucek | |||||
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| | #8 | |||||
| Re: My Hsu VTF-2 graphs BruceK: I'll get back to you with the QC for the RS. I don't have it handy right now. Quote:
25.1785 0.137 25.8 31.6978 0.275 20.2 39.9052 0.393 16.2 50.2377 0.344 12.3 63.2455 0.534 9.23 79.6214 0.512 6.47 100.237 0.493 4.27 126.191 0.358 3.03 158.865 0.407 0.06 200.000 0.114 -1.7 251.785 0.295 -3.1 300.640 0.204 -3.1 312.495 0.170 -3.4 324.817 0.136 -5.0 337.625 0.103 -4.2 350.938 0.073 -2.4 364.777 0.047 -3.6 379.160 0.021 -4.2 394.111 -0.00 -2.3 409.652 -0.01 -2.8 425.805 -0.01 -3.5 442.595 -0.01 -1.7 460.048 -0.02 -2.7 478.188 -0.02 -2.5 497.044 -0.02 -1.6 516.643 -0.02 -3.0 537.016 -0.02 -1.3 558.191 -0.03 -2.6 580.202 -0.04 -1.5 603.080 -0.05 -2.2 626.861 -0.06 -1.4 651.579 -0.06 -2.1 677.272 -0.07 -1.0 703.978 -0.07 -2.1 731.737 -0.08 -1.0 760.591 -0.09 -1.4 790.582 -0.11 -1.5 821.756 -0.12 -0.5 854.160 -0.12 -0.8 887.841 -0.11 -0.9 922.850 -0.08 -0.1 959.240 -0.04 0.22 997.064 -0.00 -0.1 1036.38 0.019 -0.5 1077.24 0.034 -0.8 1119.72 0.043 -0.7 1163.87 0.049 -0.7 1209.77 0.051 -0.8 1257.47 0.041 -1.1 1307.05 0.011 -1.3 1358.59 -0.04 -1.5 1412.17 -0.11 -1.2 1467.85 -0.15 -0.5 1525.73 -0.16 0.07 1585.89 -0.14 0.08 1648.43 -0.12 0.40 1713.43 -0.10 1.24 1780.99 -0.03 1.39 1851.22 0.116 2.27 1924.22 0.301 1.57 2000.09 0.448 0.89 2078.96 0.484 -0.4 2160.94 0.433 -1.8 2246.15 0.300 -2.8 2334.72 0.098 -3.3 2426.78 -0.17 -2.8 2522.47 -0.35 -1.4 2621.94 -0.41 0.85 2725.33 -0.14 3.37 2832.79 0.370 3.63 2944.49 0.682 1.43 3060.60 0.765 -1.4 3181.28 0.437 -3.8 3306.73 0.049 -3.7 3437.12 -0.23 -2.2 3572.65 -0.24 0.51 3713.53 0.035 2.42 3859.96 0.476 2.65 4012.16 0.803 0.25 4170.37 0.729 -2.8 4334.81 0.295 -4.1 4505.74 -0.01 -2.2 4683.41 0.072 0.40 4868.09 0.528 1.04 5060.05 0.747 -0.6 5259.57 0.813 -2.3 5466.97 0.653 -3.4 5682.54 0.589 -3.2 5906.61 0.635 -3.0 6139.52 0.763 -4.1 6381.62 0.624 -5.0 6633.25 0.475 -5.3 6894.82 0.428 -3.2 7166.69 0.978 -3.4 7449.29 1.015 -6.3 7743.03 0.913 -7.7 8048.35 0.764 -9.0 8365.71 0.691 -8.6 8695.58 0.767 -9.8 9038.47 0.588 -10. 9394.87 0.590 -11. 9765.33 0.493 -12. 10150.3 0.390 -12. 10550.6 0.464 -13. 10966.6 0.245 -14. 11399.1 0.180 -16. 11848.5 -0.25 -16. 12315.8 -0.13 -16. 12801.4 -0.44 -17. 13306.2 -0.44 -17. 13830.9 -0.72 -18. 14376.2 -0.82 -18. 14943.1 -1.08 -20. 15532.4 -1.29 -20. 16144.8 -1.64 -21. 16781.5 -1.90 -21. 17443.2 -2.35 -21. 18131.0 -2.70 -21. 18845.9 -3.12 -21. 19589.1 -3.57 -20. 20361.5 -4.01 -18. 21164.4 -4.46 -16. 21999.0 -4.92 -15. | |||||
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| | #9 | ||||
| Re: My Hsu VTF-2 graphs privateradio, Your sub response graph extends down to 15Hz, yet your cal file for the ECM8000 only goes down to 20Hz? I found Sonnies ECM8000 calibration file to be quite consistent with other ECM8000 calibration files I found floating on the internet. These were files professionally created. You might want to consider using that one instead of the one you're using. It extends to 10Hz... brucek | ||||
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| | #11 | ||||||
| Re: My Hsu VTF-2 graphs Quote:
Quote:
brucek | ||||||
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| | #13 | ||||
| Re: My Hsu VTF-2 graphs I think you are suggesting that we could include the ecm8000.cal file with the REW install files.... or built into REW. That's an idea. Thanks for the .cal file.... I wanted to compare it with mine. Here's a comparison from 20Hz -22KHz... limited to your corrections. The dotted is yours and the solid is mine. Quite a difference really... ![]() ![]() | ||||
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| | #15 | |||||
| Re: My Hsu VTF-2 graphs Quote:
brucek | |||||
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| | #16 | ||||
| Re: My Hsu VTF-2 graphs Yes, just load up the different cal file and hit "Apply Windows" from the IR Windows dialog to recalculate the response with the new cal file. | ||||
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| | #17 | |||||
| Re: My Hsu VTF-2 graphs Quote: I'm new to this but was thinking I'd use a house curve that was a little high at 20ish and then flat from 30-80hz. But after seeing your graph I am wondering if my plan is not a good one... ? | |||||
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| | #19 | ||||
| Re: My Hsu VTF-2 graphs Thanks but I'm still a bit confused. At 50hz it looks to be about -10dB and at 60hz about -15dB compared to the 20-40 range. I though the goal was to get things flat? Or in some cases I read where people want to boost the lower frequencies a bit more. But I'm trying to understand why you'd want that type of rolloff well before the cross over point. I'm sure you have a good reason and I'm just questioning this so I can understand the "why" and apply it to what may work best in my room. Thanks. | ||||
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| | #21 | ||||
| Re: My Hsu VTF-2 graphs OK, I moved my sub and remeasured with both the RS and the ECM8000. This time I went thru my AVRs xover. These are pretty close so I'm confident I have accurate measurements. Thanks for the help. I'll be back when the BFD arrives. Green is RS with newrsanalog.cal, Yellow is the ECM8000 with Sonnies ecm8000.cal file. ![]() Last edited by privateradio; 01-24-07 at 06:13 PM.. | ||||
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| | #22 | |||||
| Re: My Hsu VTF-2 graphs Quote:
See below: This shows three responses on a single graph. An 80Hz crossed sub output and a mains 80Hz output response and then the final flat resultant response... ![]() brucek | |||||
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| | #25 | |||||
| Re: My Hsu VTF-2 graphs Quote:
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