4/16/2024 0 Comments Diffraction define sound![]() Otherwise you could take just about any mediocre driver combo and have it sound like a higher end setup just with DSP correction.ĭrivers with high Q resonance modes (hard composite, stiff paper or metal cones) will have a tendency to ring at specific frequencies even when they're flattened with EQ and other forms of processing. There are people who believe you can hammer a speaker's lumpy FR into submission with DSP and have it sound like a more expensive speaker that has naturally linear FR and power response. I was dead set on 6db time/phase, now, not so much. ![]() Transients can usually be pick out as "sharper" such as wood block or keys jingling on a 6db time/phase aligned.īut music ? 12' away in your not perfect room ? Without direct comparison, I imagine a 12db crossover would just sound "different" versus a 6db, unless you had say an actual guitar playing next to it to compare which sounds more real. I prefer 6db time/phase aligned, purely subjective.īut freq response, dispersion, cost, room penetration, etc usually trumps a sharp triangular step response. Phase wrap is also an issue around the crossover point, that is an issue to many. I think there was a mention on the full range forum that a driver was resonating up near 10khz, but it also created bad distortion at 1/2 and 1/3 of the īut you are right, the driver's spike at 3.5khz maybe +8db when the driver is running at 94db versus 80db and only +5db, i don't know. I think a tone an octave or 2 below the driver's +6db 3.5khz resonance (notched to flat), will cause the resonance to ring (over time). I believe that even if you notch a driver flat, it will still ring. The human ear has to be part of the selection process, not just measurements and raw data. I realize this is an unorthodox way to design a speaker, but I've come to this conclusion through my own experiences and it works for me. After that process I look at the measured data to quantify my findings and make the crossover work in sims, then in real life. Horn loaded systems usually measure less transient accurate than other types of designs, but they sound more correct to the ear (at least to my own).įor my personal designs I listen to the raw driver playing music in free air and in a baffle first (even tweeters and CDs), then listen to sine wave sweeps and static sine waves from all angles of the driver, and finally look at what frequency range its audibly usable in. I've become a horn guy these days, mainly because they can sound more realistic, exciting and true to life (when executed properly) than almost any other direct radiating system. Many good speaker designs exist but very few exceptional ones. Everyone's hearing is different, which makes a speaker more subjective than a laboratory grade instrument. There are some things in audio you just can't quantify, even with complex measurements. I fight very hard to stay away from that critical midrange with all my designs because of my experiences. Most 2 way designs with crossover points in the critical 1 - 3k region sound rough and harsh to my ears when driven harder, even if the drivers measure very well and great care was taken with the crossover design. I've heard many speakers claiming to be low distortion designs, but at higher SPLs (not to the point of being overdriven) sound very off putting depending on how graceful the drivers handle these transients. The point this "near perfect" situation becomes noticeably imperfect when the speaker is driven harder, ie reproducing dynamic and complex musical events, shows the speaker's character, which can become highly objectionable depending on the listener's preference and hearing skill level. That in theory is desirable in terms of the speaker not adding anything to the music. You can get all the distortion components and non linearities down to such a minimum that the character of the speaker becomes almost inert. I believe what we can agree on is that no speaker is perfect and striving for that desired perfection always poses choices in compromises necessary to produce a functional design. ![]()
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