If you say so 🙂.
I think though that your Ltc should be Atc, S5 should be S4, and S6 should be S5.
In broad terms, that's correct. However, some crossover designs employ a 90° phase difference between the two outputs, while still summing to a flat response on the design axis. The downside of that crossover topology is that there will be an off-axis location where the response sums to +3dB, rather than staying at 0dB.
As you expected, you will need to use the phase as predicted by Hornresp. The two sets of outputs will need to be blended by choosing an appropriate crossover order that can provide a reasonably flat summation of the two responses. Also, keep in mind that you will need the phase responses associated with the two sets of impedance curves to get XSim to compute the correct frequency response functions.
😆🤣😆🤣, I got happy with the Audi model numbers!
I need to get on my home laptop to test it out.
Hi,
if i add filling to a enclosure(here closed mouth horn), then power output, then F9, i get a .txt-file from 10-2000Hz.
Without filling, i get a .txt with 10-20000Hz.
This also happens with the impedance output exported to .txt.
if i add filling to a enclosure(here closed mouth horn), then power output, then F9, i get a .txt-file from 10-2000Hz.
Without filling, i get a .txt with 10-20000Hz.
This also happens with the impedance output exported to .txt.
The absorbent filling material model used in Hornresp is a very good one, but it breaks down mathematically at high frequencies due to numerical overflows and underflows. There is nothing that can be done about this, and it is why the loudspeaker wizard charts and exported data are limited to a maximum frequency of 2000 Hz when absorbent material is specified.
Hi,
i try to design a BR.
To move the resonances of the enclosure up(over the x-over point) and also to make the enclosure more rigit,
i plan to devide it like this:
Will it behave the same(as simulated) as without the bar in the middle?
Thanks!
i try to design a BR.
To move the resonances of the enclosure up(over the x-over point) and also to make the enclosure more rigit,
i plan to devide it like this:
(o) = chassis
o = Port
Front:
_______
| (o) |
| |
| |
| |
| |
|__o__|
Inside:
_______
| |
| | |
| | |
| | |
| | |
|______|
Will it behave the same(as simulated) as without the bar in the middle?
Thanks!
Last edited:
where is your X-over frequency?
It might be difficult to reduce all enclosure dimensions below half-wavelength of x-over frequency, unless it's a subwoofer or a low X-over 3way.
In any case it is more relevant to place the driver and the port away from pressure-peaks (usually in the middle of the enclosure dimensions) to reduce the influence of (wall-to-wall) enclosure resonances.
a good start is making (or even better: simulating) the speaker as MLTL and moving driver and port to have the minimum resonance output.
also, consider filling the start and end of the TL with damping material, but keeping damping material away from driver and port.
have a look at this post for a measurement of BR and MLTL port outputs:
https://www.diyaudio.com/community/...rbers-and-port-geometries.388264/post-7695049
and this post for optimizing port position, to reduce the (half wavelength) TL-resonance peak:
https://www.diyaudio.com/community/...rbers-and-port-geometries.388264/post-7696292
respective hornresp record:
https://www.diyaudio.com/community/...rbers-and-port-geometries.388264/post-7696655
Sorry, my Ascii-picture didn't work with Code-Tags, here is a picture instead. I wonder if the bar in the middle does harm the output, i feel it should be at least shorter.
At about 700Hz.
I did that:
I'm not worried about the resonances that hornresp show, but fear the resonances that hornresp can't know about(sidewalls dimensions are 6x30cm), so i wanted to make(as mentioned in the above post) the dimensions about 2x 6x15cm. By the way, the enclosure is planed to be placed in a corner, and it es as flat as possible(to avoid baffle-step/compensation if that makes sense).
To be on the safe side perhaps it could be replaced by two short pieces, something like as shown by the red lines below.
Basically speaking, air when under pressure will behave like a liquid. I am discerning that the long central piece of wood is to stiffen the enclosure? As David pointed out, perhaps a central hole of an area at least the area of your egress port, if not larger. You may have created unwanted secondary resonant enclosure with the way that you show. An impedance/Phase/SPL all on one graph will show if this is true. You will see bumps in the impedance and phase if it is effecting the output greatly.
The high frequency compression driver and horn are specified using the Nd record, and the midbass drivers are specified using the ME1 record. Read the Help file for further details.
When I switch from Nd to ME1 and vice versa the driver parameters don't change that's why asking.
You don't switch a single record from Nd to ME1.
Nd and ME1 are two separate records, with different drivers.
Nd and ME1 are two separate records, with different drivers.
I don't understand, why wouldn't you just use the Next button to move from the activated ME1 record to the Nd record, and then select the MEH wizard in Edit mode?
I'm trying to understand how it works. The ME1 defines mid driver and port while Nd the compression driver and horn and from this record we go into Input Wizard?