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Erin's Audio Corner gets a Klippel NFS!
- Thread starter hardisj
- Start date
OP
- Thread Starter
- #242
Done! I fired up the software and gave it some spins. Test runs proved successful. More updates this weekend. 
Impressive progress!
Wowowow. You've come a long way with your metering test gear ability!Done! I fired up the software and gave it some spins. Test runs proved successful. More updates this weekend.
View attachment 112046
View attachment 112047
OP
- Thread Starter
- #245
Well, ladies and gentlemen, we are off to the races.
ribosradagast
Active Member
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Dat reaction doe...
Evil laugh
Evil laugh
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From the pics I didn't realize that whole arm assembly was suspended by cables, I didn't know that whole part rotated around the pedestal!
Is there a limit to the height of tower speakers that you can measure? Or is it just limited by your ceiling?
Is there a limit to the height of tower speakers that you can measure? Or is it just limited by your ceiling?
Steve Dallas
Major Contributor
It all gets real, once the Evil Overlord laughs!
Klippel doesn't document some of the finer nuances of what you need to get optimal results. In this case, there was actually a bug in field separation for some speakers generating erroneous results if you asked the system to perform the separation to too high a frequency (shorter distance). Before I could report the bug, they found it and now enforce a longer distance. In this example I have set the limit to 4 meters. Notice how it is complaining that it should be longer with its own limit line and red squiggle:
In this case the error is next to nothing so it is fine.
Note that this is NOT the distance from speaker to wall. It is the path length of shortest reflection from the speaker, to the wall, and back to the microphone.
Anyway, the negative reaction to my previous post by Erin tells me he wants to figure these things out by himself so I am not going to comment further.
OP
- Thread Starter
- #251
I didn’t think it was negative. Someone quoted you and asked if you had to have 5m distance between the DUT and the wall because that’s how they took your reply. So I was clarifying that is not the case.
It's pretty amazing to me how well this technology works.
thewas
Master Contributor
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Can't find the "artistic" ones on the left, though.
OP
- Thread Starter
- #256
I ran my first test yesterday on a yet to be named speaker. I chose a simple 500 point test to make sure everything looked good. Took about an hour. Yep. All is good. Called it a day.
This morning I started up the 2000 point test to reduce the error >10Khz. It is about 30 degrees outside. My car doors were frozen shut when I went to run an errand. It's coooooold. Before I left I turned on the 240v heater in the garage and it quickly warmed up to 72°F at the DUT location. Since the garage is insulated it maintains the temp quite well. (It is still at 70° two hours later.) I am currently running the test and it is about halfway through. But now... I am inside, doing chores while the NFS is churning away, producing results. Every once in a while I check up on the laptop running the test via VNC from my desktop in my office (as you can see below).
To those of you who have never spent days' worth of time measuring a loudspeaker you may not understand just how great this is. But, if you have then you know just how much testing speakers drains your time and your literal physical energy (not to mention the mental stress that comes from trying to balance it all with weather, family, and work life). The NFS is gonna make my life so much easier. Not to say it doesn't take time to set things up but not having to be physically outside running from the DUT to the computer 100-something times (for a literal total distance of 2 miles; I measured) is ... liberating. That really is the best word I can think to describe this feeling.
This morning I started up the 2000 point test to reduce the error >10Khz. It is about 30 degrees outside. My car doors were frozen shut when I went to run an errand. It's coooooold. Before I left I turned on the 240v heater in the garage and it quickly warmed up to 72°F at the DUT location. Since the garage is insulated it maintains the temp quite well. (It is still at 70° two hours later.) I am currently running the test and it is about halfway through. But now... I am inside, doing chores while the NFS is churning away, producing results. Every once in a while I check up on the laptop running the test via VNC from my desktop in my office (as you can see below).
To those of you who have never spent days' worth of time measuring a loudspeaker you may not understand just how great this is. But, if you have then you know just how much testing speakers drains your time and your literal physical energy (not to mention the mental stress that comes from trying to balance it all with weather, family, and work life). The NFS is gonna make my life so much easier. Not to say it doesn't take time to set things up but not having to be physically outside running from the DUT to the computer 100-something times (for a literal total distance of 2 miles; I measured) is ... liberating. That really is the best word I can think to describe this feeling.
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OP
- Thread Starter
- #257
I might have an extra one. PM me your address and if I find it I'll send it to you.
Does Klippel have a temp/humidity sensor built in too so that is logged?
OP
- Thread Starter
- #259
Not that I am aware. But I have a temp probe I keep in the garage when testing; same as I did before I had the NFS.
Yeah I just wondered if it the system has a couple of analog inputs or even a TC input so you can capture that data and even log it. Just me being me since I do that often with my DAQ.
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