I don't think the topic relates to specific transducers, only the frequencies they produce, feel free to call them what you like.
Not usually the same range of effectiveness, thus my question. The equivalence is so misleading in general.....
I don't think the topic relates to specific transducers, only the frequencies they produce, feel free to call them what you like.
you seem to be referencing the driver and not the actual subwoofer?
Anyway above ~120Hz or so it becomes increasingly difficult to maintain phase coherence between a subwoofer and a speaker, which is 'measurable'.
An upright bass has a string pluck that includes much higher frequencies than 30 Hz. That is telling you where the sound is coming from.my ears can't confirm the not localizable bass theory. I throw 30Hz at my sub and I clearly hear it form it's direction.
does the theory realy work for you guy in the real world test? Do you guys hear the soundwave emerging form all sides or something like that?
I also tested my setup steep-crossed at 200Hz for stuff like male voice. without the mains I can obviously hear it coming from the sub, as soon as the mains come in the other frequencies simply overpower it.
I can also mute the left channel of a upright bass like this, and it will sound like it is coming from the right main only:
the only problem would be stuff like synth bass, but no engenier would ever pan them out of center anyways
An upright bass has a string pluck that includes much higher frequencies than 30 Hz. That is telling you where the sound is coming from.
There are also harmonics, resonances in materials, etc.
With pure tones, there is no chance of you localizing the source of a 30 Hz wave.
my ears can't confirm the not localizable bass theory. I throw 30Hz at my sub and I clearly hear it form it's direction.
does the theory realy work for you guy in the real world test? Do you guys hear the soundwave emerging form all sides or something like that?
I also tested my setup steep-crossed at 200Hz for stuff like male voice. without the mains I can obviously hear it coming from the sub, as soon as the mains come in the other frequencies simply overpower it.
I can also mute the left channel of a upright bass like this, and it will sound like it is coming from the right main only:
the only problem would be stuff like synth bass, but no engenier would ever pan them out of center anyways
sharp slopes (24db/oct)
that's not sharp. this is a 24db/oct low pass at 80Hz compared to the one I am using.
again: it is a FIR filter
View attachment 143280
why? Isn’t it making the phase messy?
I noticed my response was better at 24db/oct vs 48db/oct
that's why I said I use FIR filters. they don't produce phase shifts.
If I would cross with 24dB/oct at 200Hz I would be hearing 500Hz-ish stuff from the sub
audible directivity mismatch
sorry?
it's difficult to match the phase at the crossover region when the room is not minimum phase / modal anymore.
Do you hear any artifacts as a result? Some tones / instruments may sound larger in the sound stage than others.
tubas typically play at ~200 Hz. if you're curious if that's what actually happening.
I dialed in the delay of the mains using trail and error and FR after rouphly matching on the excess group delay graph.
I use this setup since january and never heard any artificts.
but my setup is also DRC mixed-phase corrected
it's difficult to tell from measurements at such regions whether things are 'correct'.
when the room is not modal anymore what you measure is not what you hear.
is around 800-1000Hz afaikwhat you measure is not what you hear
I tried crossing several subwoofers "too high" and they all sounded very bad.
However I cannot see anything in the measurements or specs that suggests so, the FR looks flat but it still sounds terrible. it's not just beaming, it sounds "boomy" and "slow" and "muddy" in every direction.
e.g. this Seas L26RO4AY has usable FR up to 800hz per the manufacturer, and is even recommended up to 1Khz. yet it sounds really bad starting as low as 200hz.
...
What in the specs or measurements tell you to not use this driver at, say, 500hz?