An excellent video that can help people move forward quickly. Sad with all the comments from people who think they know things better in a false vision of perfection. I started building speakers in the mid-1970s when the methodology and resources looked different. After that I worked in R&D in telecom and other industries for a few decades, I know what advanced measurement technology and its applications are all about. I also know that a flat frequency response does not guarantee a great experience. It is ultimately the listener's ears and brain that decide what sounds good. Long before today's available resources, I was building speakers that made people happy.......despite the resources being paper, pencil and a calculator, sometimes supplemented by writing software that, for example, calculated horn speakers. These days the tools are better but not an absolute requirement to do something well. Forge your own happiness with the tools at your disposal.
Very well written. Thank you so much for sharing your experience. The earliest I built anything was in the 90's with much less in resources and much more trial in error. I agree the tools are great, but for me I would agree they are a starting point. Ultimately how it sounds is the real deal. I'm looking forward to the new year to continue the journey. Your feedback is most welcome should you follow.
This info was great…. And It translated into Vitruix with a little head scratching… But the next big hurdle is “FINDING THE TECH DATA”…. For some older speakers. I’m trying to upgrade some older JBL speaker boxes by upgrading the mids and tweets… …but I can’t find any of the Speaker Performance Info. A dealer was kind enough to send to me the impedance chart for a single driver… but none of the frequency charts. Do they exist for the 1980s JBL drivers? If so… I really would appreciate a helping hand / direction in how to find that stuff. I’m not really interested in just throwing parts dollars and time into an upgrade without having a plan. Thx
I'm sure I measured my own, exporting FRD and ZMA files from REW and DATS measurements, but I can't remember how I did it. There are tutorials in the "help" files of the corresponding program. This will be more accurate than tracing promotion graphs from a manufacturer.
This doesnt work unless youre making the exact same testing scenario as the manufacturer. i.e. the same size enclosure or infinite baffle. You need measurements of your drivers in the enclosure youve built specifically for them
@@davewiebespeakerdesign i did the exact same as you with FP Graph Tracer. But they graphs that are supplied with the drivers arent on your baffle so wont work - youll get close though. The scariest thing for me was putting 2.83Volts into my compression driver rated at 110db - that was loud!!
Yes, using the one supplied from the datasheet only gives you a general understanding of what could maybe happen, but with the driver being the only comparable factor. The baffle and box volume and room response (!) will certainly alter your results. If you are to measure using your own mic, you should try to take your speakers outside and away from any flat surface to eliminate that last factor altogether. Using a freestanding ladder to keep the speaker away even from the ground is a good method. Then, using the amazing and free Room Equalizer Wizard (REW), you can do your sweeps and export the results to a text file. Just add the frd extension manually. That would make for a great episode in this saga.
An excellent video that can help people move forward quickly. Sad with all the comments from people who think they know things better in a false vision of perfection. I started building speakers in the mid-1970s when the methodology and resources looked different. After that I worked in R&D in telecom and other industries for a few decades, I know what advanced measurement technology and its applications are all about. I also know that a flat frequency response does not guarantee a great experience. It is ultimately the listener's ears and brain that decide what sounds good. Long before today's available resources, I was building speakers that made people happy.......despite the resources being paper, pencil and a calculator, sometimes supplemented by writing software that, for example, calculated horn speakers. These days the tools are better but not an absolute requirement to do something well. Forge your own happiness with the tools at your disposal.
Very well written. Thank you so much for sharing your experience. The earliest I built anything was in the 90's with much less in resources and much more trial in error. I agree the tools are great, but for me I would agree they are a starting point. Ultimately how it sounds is the real deal. I'm looking forward to the new year to continue the journey. Your feedback is most welcome should you follow.
@@davewiebespeakerdesign Thank you, you have one more follower now.👍👁️
Hello, I have just been experimenting with this amazing utility I did not know existed, thanks for the tip!
Glad I could help!
This info was great…. And It translated into Vitruix with a little head scratching…
But the next big hurdle is “FINDING THE TECH DATA”…. For some older speakers.
I’m trying to upgrade some older JBL speaker boxes by upgrading the mids and tweets…
…but I can’t find any of the Speaker Performance Info.
A dealer was kind enough to send to me the impedance chart for a single driver… but none of the frequency charts.
Do they exist for the 1980s JBL drivers?
If so… I really would appreciate a helping hand / direction in how to find that stuff.
I’m not really interested in just throwing parts dollars and time into an upgrade without having a plan.
Thx
Might need to get an Omni Mic and a Dats if you really have your heart set on getting them going.
Thank you so much! That helped me a lot. I'm super thankful for that. Now i can finally import files from DATS V3. 🔈🔈🔈🔈🔈👍😀
Glad the video helped you out!
Thank you so much. This is a life saver video.
I'm glad you found it helpful!
Great video! Was unable to download the file from the site. Found the zip on som audio forum luckily
Glad it was helpful, good luck with your project!
Hi, it seems like their website is down. May you upload the app in a dropbox and share the link? Thanks.
I added a link to the DIY audio forum where you can get it. Thanks a bunch for pointing it out. Hopefully the website to the main link pops back up.
nice, thanks and well done
No problem 👍
I'm sure I measured my own, exporting FRD and ZMA files from REW and DATS measurements, but I can't remember how I did it.
There are tutorials in the "help" files of the corresponding program.
This will be more accurate than tracing promotion graphs from a manufacturer.
Omni Mic does export them if you want!
This doesnt work unless youre making the exact same testing scenario as the manufacturer. i.e. the same size enclosure or infinite baffle. You need measurements of your drivers in the enclosure youve built specifically for them
Thanks for the tip, I do have the microphone for testing, this is something I'm trying to learn.
@@davewiebespeakerdesign i did the exact same as you with FP Graph Tracer. But they graphs that are supplied with the drivers arent on your baffle so wont work - youll get close though. The scariest thing for me was putting 2.83Volts into my compression driver rated at 110db - that was loud!!
110db is nuts, yeah that would hurt!
Yes, using the one supplied from the datasheet only gives you a general understanding of what could maybe happen, but with the driver being the only comparable factor. The baffle and box volume and room response (!) will certainly alter your results.
If you are to measure using your own mic, you should try to take your speakers outside and away from any flat surface to eliminate that last factor altogether. Using a freestanding ladder to keep the speaker away even from the ground is a good method. Then, using the amazing and free Room Equalizer Wizard (REW), you can do your sweeps and export the results to a text file. Just add the frd extension manually. That would make for a great episode in this saga.
Great information, I'm going to check out REW, and look into changing my testing methods, thanks for the help.
Lizeth Grove
From a learner: why select the blue line?
It's the on axis line.