pattern control below 400Hz

[Juhazi]

You should move those bushes in pots on the pavement between the speaker and mic when measuring. Tile floor gives "perfect reflection" now.

[hollowboy]

Originally Posted by Juhazi

You should move those bushes in pots on the pavement between the speaker and mic when measuring.

I think maybe you are looking at a hose

The mic is on the little table in front of the laptop.

Originally Posted by Juhazi

Tile floor gives "perfect reflection" now.

That seems right to me. I experimented with stuff to prevent ground bounce, and found that that made the notch in response worse (more complex).

[Juhazi]

Pots etc. are diffusers, pillows etc. would be dampers. Anyway sounds like you have recognized the floor bounce 😄

[hollowboy]

Black/yellow = sealed box, on axis vs 30 degrees off axis.

Black/blue = perforated box, on axis vs 30 degrees off axis.

Not much difference, but the perforated box is slightly 'tidier' off axis.

One has to read around the 2 big ground bounce notches... maybe next time I'll do ground plane measurements.

[hollowboy]

0 vs 150 degrees off axis.

The perforated box has a lot more rear rejection @ 100Hz, but for a 400Hz or 500Hz crossover, this is not a great outcome.

[hollowboy]

0 vs 90 degrees off axis. This is where the perforated box shines.

...so it would be throwing a bit less off-axis sound into the room.

[Juhazi]

Looks like REW? I love it but it can't draw directivity graphics or count DI. But taking measurements at 10¤ steps and overlaying all of the 0-90¤ (and 90-180¤ separately) would reveal the directivity "shape". Set IR gating to 6, 12, 20, 60 etc. ms and look at same measurements again. I have found 20ms and 1/12 smoothing best and then first reflections can be detected easily.

This is from ARTA and from this thread DSP midrange directivity control aka kinda cardioid

[Brett]

Originally Posted by hollowboy

This is a concern

It is for me as I typically do it alone. The garage is on the same level as the yard where I test, but the living room is two flights up.

[cowanaudio]

Time to buy a six wheeled stair climbing hand truck. That will make your life a lot easier.

[Brett]

Originally Posted by cowanaudio

Time to buy a six wheeled stair climbing hand truck. That will make your life a lot easier.

True. Probably a good investment for moving other heavy things too, like fridges and washing machines. I'm off to Bunnings later today...
To finally mount the top sections in-situ, I think beers, BBQ and make a day of it with a few mates.