I see two resonances, one for the box and one for the reflex tube, together with their usual phase jumps.
Usually they are farther apart, but that's a matter of tuning, other than that, nothing unusual for me.
But I'm no expert.
Do you have a specific question?
Jan
Usually they are farther apart, but that's a matter of tuning, other than that, nothing unusual for me.
But I'm no expert.
Do you have a specific question?
Jan
Here we have something between BR (28Hz) and closed (45Hz), bass reflex port fires near carpet, speaker lies on carpet. Inside box there is gyroid infill 7%. Does it have impact I don't know.
Edit: this 3D printed enclosure has leaks because some unerextrusion here and there.
Edit: this 3D printed enclosure has leaks because some unerextrusion here and there.
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Well the tuning doesn't look like 28Hz and 45Hz. Maybe the closed box resonance is off because of the damping by the carpet, depending how the box is positioned wrt the carpet.
How does it look with the box off the floor, on a stool or so?
Jan
How does it look with the box off the floor, on a stool or so?
Jan
28Hz is typical BR for this driver while 45Hz is what you would expect from closed box 10 litres. After sealing outside with duct tape I got this:
As you can see, reflex twin peaks are one peak with a depression in the middle. That must have been a lot of leakage.
The Reckhorn D-165 as sold by Mr. Reck in 11 liter volume as a closed box has more than 10db less output in the low frequencies than a ported version tuned to 28hz.
The reflex port with 5cm diameter takes a longish 55cm with end correction factor of 0,732 in win isd simulation.
The reflex port with 5cm diameter takes a longish 55cm with end correction factor of 0,732 in win isd simulation.