TOPIC:

asx77 wrote:

I saw someone on YouTube measuring speakers outdoors and thought “nah! Too much hassle “ but I like your suggestion, thanks!

Measurements like this are useful for isolating the raw output of a loudspeaker or subwoofer from the effects of the room. Doing this would however not be of any use to you for your current application. You need to know what actually happens in your room, since as you've already pointed out it will affect the response in a way that makes some crossover choices more sensible than others.

Make measurements at your listening position, with your speakers and sub in their intended positions.

It was just to remove all influences of the room and get an unadulterated frequency response. And from that decide where to set the cross over point.

Would be interesting to do it twice - once as above; and once with the speakers in their usual position and miked from the listening chair.

My speakers go down to around 35 Hz but I have my crossover at 120 Hz, applying a high-pass filter to my main speakers at this frequency. In part this is chosen as it's where I can have a crossover region with the best phase matching between main speakers and subwoofer. Having measurements made outside without room influences wouldn't actually have been of any use to me at all.

Even for someone planning not to apply a high-pass filter to the main speakers I still think it's the in-room response that should be focused on, since this is what actually needs to be matched to.

How can you tell where the best phase matching occurs?

Making measurements of each speaker and the sub seperately using REW, using the same acoustic timing reference for all, and then looking at the phase graphs.

Ahh.. righto. The phase graphs are not something I’ve paid much attention to so far. Have only looked at SPL and Waterfall.

Hi All,
I currently vertically biamping and having a great DAC that I would like to keep (RME Adi-2 DAC fs) this system also includes an active analog crossover. What would be the best configuration (MiniDSP unit) to implement DIRAC correction? is DIRAC also correct in the time domain?
Thanks,
Eitan