Cardioid Bass.... yes, very good!!

[Pallas]

Seems like a lot of people end up there. <snip>

It seems to me that cardioid/dipole make more sense in the next region up, ie upper bass/lower midrange. You can’t really spread out sources there, but room modes still aren’t dense enough to be in the statistical region.

 

[bradleypnw]

It seems to me that cardioid/dipole make more sense in the next region up, ie upper bass/lower midrange. You can’t really spread out sources there, but room modes still aren’t dense enough to be in the statistical region.

What happens if you spread out sources in the upper bass/lower midrange?

 

[Pallas]

What happens if you spread out sources in the upper bass/lower midrange?

You hear them where you put them. For example, mount a driver playing up to 300 or 400 Hz behind you to the right, and you'll hear it there.

 

[bradleypnw]

You hear them where you put them. For example, mount a driver playing up to 300 or 400 Hz behind you to the right, and you'll hear it there.

OK. I wasn't sure if our perception locates on a certain frequency range or not. For example, if you locate a 400Hz driver to your back right but then mid/upper mids at standard front axis locations.

Or, what if you flipped it? Placed low mids on front axis and mid-upper-mids around the room. Does a frequency range dominate our location perception so we locate on that position?

I can't think of a practical reason why someone would want to do that but it would be good to understand.

 

[kees52]

I go test it, have saw the panels for the closed 12 inch box, and monday the sawdust for the dipole for 2 x 10 inch w26s woofers from visaton.

The closed box has the reference 1260 woofer.

And then play, I need boxes for mine designs so why not try.

 

[gedlee]

OK. I wasn't sure if our perception locates on a certain frequency range or not. For example, if you locate a 400Hz driver to your back right but then mid/upper mids at standard front axis locations.

Our localization capability will peak in the 1-3 kHz range and it falls to either side. By the modal range in a small room there is little to no localization. Of course if you play a single tone, you will likely localize it no matter the frequency, but for complex signals with lots of frequency content, the HFs will override the lows in location perception.

 

[Bill Coltrane]

It seems to me that cardioid/dipole make more sense in the next region up, ie upper bass/lower midrange. You can’t really spread out sources there, but room modes still aren’t dense enough to be in the statistical region.

Isn't this exactly what D&D do?
Cardioid low mids, so the 100Hz to 500Hz range is more flat at the listeners ears.
Then add multiple subs and you have "flat" sound from 20-20kHz.


In portable PA, cardioid subs can be useful.
There you often can't use multiple subs.
Edit: And spl levels often are a limit.

 

[gedlee]

so the 100Hz to 500Hz range is more flat at the listeners ears.

Why would that be?

 

[Pano]

By the modal range in a small room there is little to no localization.

That's the received wisdom, but it's usually not true. I've done quite a lot of testing that shows it's something of a myth.

Of course if you play a single tone, you will likely localize it no matter the frequency, but for complex signals with lots of frequency content, the HFs will override the lows in location perception.

In testing I have found single pure tones to be difficult to locate, no matter the frequency. Band limited noise is much easier. Agree that the HFs can steer location perception (they are the most noticeable), but they mostly don't obscure bass if it's there.

 

[kees52]

Started with the closed box with a 12 inch, later the dipole with 2 x wsp26s visaton, these did well in a dipole in past, did let the doors rattle with it, clean bass.

This closed box is a version who fires on the floor.

 

[kees52]

Started with the closed box with a 12 inch, later the dipole with 2 x wsp26s visaton, these did well in a dipole in past, did let the doors rattle with it, clean bass.

This closed box is a version who fires on the floor.

I want to put in bassreflex pipes, however, where I do set the output because next to the speaker is no room, only on top, or sides, somewhone?

I do need some sub amp and correction, but this is not a problem.

I aks david, author of hornresp also.

regards