MEH Synergy Posted January 15, 2019 Share Posted January 15, 2019 13 minutes ago, babadono said: and then after a cocktail or TWELVE fughettabouditt. I agree Quote Link to comment Share on other sites More sharing options...
babadono Posted January 15, 2019 Share Posted January 15, 2019 HeHe...I saw what you did there Quote Link to comment Share on other sites More sharing options...
MEH Synergy Posted January 15, 2019 Share Posted January 15, 2019 7 minutes ago, babadono said: HeHe...I saw what you did there What? 🥃 Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 6, 2019 Share Posted June 6, 2019 Well, my XP-3060 arrived yesterday, and as luck would have it I have some time today to try to figure this thing out. There is an overwhelming number of things you can do with this thing compared to my Ashly units. I know I am going to need help when I can figure out what questions to ask. Setting up crossover points will be task one. This unit is going to run my LR 3 way front speakers. 2 Quote Link to comment Share on other sites More sharing options...
rplace Posted June 6, 2019 Share Posted June 6, 2019 2 minutes ago, tromprof said: Well, my XP-3060 arrived yesterday, and as luck would have it I have some time today to try to figure this thing out. There is an overwhelming number of things you can do with this thing compared to my Ashly units. I know I am going to need help when I can figure out what questions to ask. Setting up crossover points will be task one. This unit is going to run my LR 3 way front speakers. Best of luck. Give me the Cliff Notes version when you have it figured out. I'm still wrestling with mine. Fun at times, overwhelming at others. Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 6, 2019 Author Share Posted June 6, 2019 Just a suggestion, but if you take a measurement with just the individual drivers (i.e., three measurements to cover the entire audible band), you can flatten the response of each driver first. Then you can look at the relative gains needed on each channel, and set those. REW allows you to plot the response of all three measurements at the same time, showing you where the best crossover points will likely be. The last part--setting up the crossover filters--can be done then using whatever filters you choose, but guided by the individual driver/horn performance. You can set up the crossovers for zero phase growth through the interference bands using a "Danley technique"--see the following for that discussion: Feel free to PM me if you've got questions. Chris 1 Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 6, 2019 Share Posted June 6, 2019 1 hour ago, Chris A said: Just a suggestion, but if you take a measurement with just the individual drivers (i.e., three measurements to cover the entire audible band), you can flatten the response of each driver first. Then you can look at the relative gains needed on each channel, and set those. REW allows you to plot the response of all three measurements at the same time, showing you where the best crossover points will likely be. The last part--setting up the crossover filters--can be done then using whatever filters you choose, but guided by the individual driver/horn performance. You can set up the crossovers for zero phase growth through the interference bands using a "Danley technique"--see the following for that discussion: Feel free to PM me if you've got questions. Chris Thanks for all the info you put out here! I just got it hooked up and actually working! I will be attempting to use REW shortly. I have such a huge tangle of cords with my setup (16 channels) that getting it hooked up right is taking time. Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 6, 2019 Author Share Posted June 6, 2019 I've only got 13 channels--and I believe that I understand... 1 Quote Link to comment Share on other sites More sharing options...
MisterVego Posted June 6, 2019 Share Posted June 6, 2019 Just a TIP.... If you can permanently plug your Xilica into your home router, you can wirelessly connect to it from your laptop. Only thing you need to do is assign it an IP address. Not having to be tethered to a USB cable is so nice... 1 Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 7, 2019 Share Posted June 7, 2019 The Xilica sounds quite good, already a noticeable improvement over the Ashly units. The computer interface is intimidating at first but seems well laid out and I was able to easily input REW numbers for EQ. Next is to more accurately get time delay figures. I am using my old numbers from the Ashly units which were derived from measuring with a tape measure and guessing a bit. Any tips on getting that accurate would be appreciated. Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 Look at the spectrogram view--it will tell you the mismatch in time alignment between ways in milliseconds. You can also look at the group delay plot, and after punching the "Generate minimum phase" button under the controls dialog on the upper right side of the window, you should be able to turn on the "excess group delay" trace at the bottom of the plot. This also tells you how much mismatch that you have by the excess group delay y-axis value. Chris Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 Here is an example of a 4 ms bass bin time lag, as seen by the "peak energy time" trace: Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 The same measurement, instead looking at the excess group delay plot: Chris Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 7, 2019 Share Posted June 7, 2019 This is my right channel. Not sure what I'm looking at. Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 2 minutes ago, tromprof said: This is my right channel. Not sure what I'm looking at. You can set the defaults in REW to look more the spectrogram plot I showed above using the values found in the settings box in the upper right hand corner (don't set the Scale Top, or Scale Bottom since those values will auto-scale with the plot): Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 7, 2019 Share Posted June 7, 2019 I assume I should be looking hard at the crossover points (in my case 600 HZ and 6000 HZ)? Using the spectrogram values that you show above I don't see anything resembling your time mismatch. I am I still not getting something, or do I already have it very close? Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 7, 2019 Share Posted June 7, 2019 Is this something? Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 I'd first set all the values of the dialog box that I posted so that the plot begins to resemble something that's recognizable. You also need to sweep from something like 10 Hz to 20 kHz. You're currently showing a sweep of 494 to 506 Hz. You need at least 2-3 octaves of frequency sweep range to see what's occurring. That's settable in the measure dialog just as you take a sweep. Chris Quote Link to comment Share on other sites More sharing options...
Chris A Posted June 7, 2019 Author Share Posted June 7, 2019 It also looks like your "limits" settings are very zoomed-in on the frequency axis. I'd use the same limits as are found in the "Controls" dialog (...why REW allows you to set limits in two dialog boxes for the spectrogram is odd). I'd turn the Frequency Axis setting to read "Y-axis" instead of "X-axis". Quote Link to comment Share on other sites More sharing options...
tromprof Posted June 7, 2019 Share Posted June 7, 2019 Now I think I have something. 5 ms delay? Quote Link to comment Share on other sites More sharing options...
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