Recent content by ernestcarl

PA manufacturer web or PA news sites might have more information and case studies about individual installations. In America: https://www.danleysoundlabs.com/applications/sport-venues/ https://meyersound.com/sports/ https://www.fulcrum-acoustic.com/markets-served/sports-stadiums-and-arenas/...

Funny -- seasoned (maybe), not exactly "expert" as I don't even have a good grasp of some of its other features. I've actually been using the more "stable" standard release version recently in my old Win 10 laptop which I prefer to use for quick REW measurements over Linux. Now, I am a little...

Then continue on…

I don’t particularly have any strong viewpoint whether his approach is right or wrong. At this point you are beginning to sound like a broken record on continuous replay, though.

I suppose so, yes. To be frank, I really do not do DIY speaker builds myself. If one were to move either speaker, the timing reference would no longer be accurate. I think it works well enough, for "testing" already finished speakers. But I did slightly re-do the xo EQ here which meant the...

As I said, I use completely different speaker (so not exactly the DUT) that is already setup nearby as my acoustic time reference. When doing individual driver measurements recently on my RX699, for example, I used my Neumann KH120 as the reference and told REW to automatically adjust the time...

I use another speaker for the acoustic time reference. However, even then, my results can sometimes be off or a glitch can occur in the middle of a sweep so I now do repeated measurements and discard measurements that look off -- by looking at the IR/step and phase.

Yes, you really have to measure each driver individually at the same reference distance. You probably already know this, but REW's alignment tool feature can be a great visual aid here: *polarity of LF MW inverted in second plot ---- Assuming that none of the drivers are broken, perhaps a...

This first step considered as individual “driver” correction level seems questionable to me. It can be a useful data point, but I would not bother to make a correction filter from such a close proximity measurement. I know you eventually convolve multiple filters so the final filter ends up very...

I would only move furniture away if it is readily mobile -- e.g. chair for a desk ~vs~ calibration microphone and its floor stand. I have speakers directly facing beds in bedrooms... am I supposed to dismantle and move queen-sized bed furniture outside first? How about the chairs inside the...

I noted this PA speaker -- purchased on ebay for cheap -- was "out-of-spec". Well, I consulted the B&C 6FHX51 spec sheet today and it turns out I was wrong: *Ignore the unevenness below 1kHz as that's largely because of room/desk "boundary effects" There is a dip there after all! I haven't...

There were signs of "over correction" in the step response: teeny-tiny (likely very subtle) pre-ringing perturbations. ----------- I've recently converted my bass-limited coaxial center speaker from a 2-way single-amp design to 2-way bi-amp... but kept the passive xo to protect the HF horn...

The dreaded leaf blower! I don't know if it's the same "leaf blower" machine they use in our neighbourhood for clearing out snow as well... but those sure are noisy as heck! Unfortunately, the house I'm living in even allows me to hear it all the way down to the basement where my main listening...

Have you tried simulating beforehand -- rather than adjusting after the fact -- the summed/vector averaged results (e.g. adjusting offset time/delay and EQ of the cancelling IR) in REW? I know this can be performed manually -- but probably difficult to get truly optimal results. Would be nice to...

Result between two different xo EQ designs I've cooked up for my own 7.1c desk setup: https://drive.google.com/file/d/1LRdcE7XMjdRor4ToyDEWbaymiCUtwnLZ/view?usp=sharing Raw measurements taken at the MLP: https://drive.google.com/file/d/1zUUee3FNyYupIgRH8ZwqSXjZBwz8QwFv/view?usp=sharing Which...