Here's a substantial body of well-intentioned advice based on a single amorphous word describing the problem: transient. Could we have a bunch more descriptions of what the woofer's shortcomings are. Maybe a graph showing the sense of loudness versus frequencies (easily done by listening to a glide tone - esp with freq benchmarks).
Also kind of weird that everybody assumes the flat curve spit out by the sim is the right curve.
Ben
Also kind of weird that everybody assumes the flat curve spit out by the sim is the right curve.
Ben
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Starting in post 2 and continuing on, most people have commented that the box is too small and tuned too high causing boom, especially in room.
The sim is not flat, it's peaking in the lower bass, which is usually a disaster in room if you want natural sounding bass. You shouldn't need a sim to know this is the response you get from a high q driver in a box that's too small and tuned too high.
OP mentions his 3 inch midbass, which probably have no real low bass to speak of, (and probably positioned away from room boundaries unlike the sub) sounds tight and accurate.
I think most people here can read around the "single amorphous" word and see what the problem is. The box is too small and tuned too high for the driver, causing boomy sound when placed in a room. It would probably sound fantastic if used outside.
The problem here is NOT the sim. The sim is likely a pretty accurate picture of this sub's 2 pi response and a measurement would most likely agree to a large extent.
Asking for a subjectively hand drawn frequency response chart is asking for trouble and begging for this issue which is already pretty clear to those that understand what's going on to be hopelessly confused.
I think transient response here is ill explained. It isn't group delay or time delay. Transient response is how accurately speakers producing sudden impulse sound. As an example sound of gun firing, the amplitude of sound raises to large extend then fall to null. It is also some what considered dynamic sound. Enclosure itself can't support to produce good transient response, speaker Qts damping effect is also been considered. For better transient response, sealed enclosure helps a bit due to springness of closed air in enclosure.
You and all of us in this thread are dealing with two different types of discourse.
At the verbal level, there is trouble finding quite the right words to characterize a human auditory experience. You are working at that. Important to communicate experience accurately, but grasping for the rhetorically right words is helpful only as a start in addressing it.
At the acoustic level, analysis matters. But smart analysis based on the human experience of quality sound not just reducing the validity of the experience by saying, "music reproduction is nothing but Fourier analysis".
Specifically, long ago I used to work with tone bursts. Say 4 cycles of 100 Hz sine waves which start abruptly and end abruptly (BTW, not really the Hann shaped tone bursts in REW). For sure, a good amp would reproduce tone bursts perfectly on my scope.
For speakers, not easy to say what these tone bursts should look like because obviously, you need vast bandwidth to start and stop abruptly, far more than 20-20k Hz.
Good "fast" transient response needs high performance both in starting abruptly and stopping abruptly, not just treble.
Ben
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