Thought-experiment: DSP per frequency, wrong/random arrival time, compensated to right phase, finally flatten amplitude. I would doubt its IR but has anyone tested it, even just to mess up fundamental/harmonics?
To me, perfect transcient accuracy suggests theoretically perfect IR limited by bandwidth. The null-hypothesis below being unlimited bandwidth; 40hz-20khz (or higher?) ideal fullrange driver being a useful approximation to a practically transcient perfect speaker. @tmuikku
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What was the gate setting? It would be easier for me to interpret if you showed 5dB scales, and possibly used some smoothing. Might need a shorter gate. I can't tell.
Would you want to improve on this? I guess what I should ask, is do you want to experiment further?
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A couple of thoughts.
The mids could probably be crossed lower than 2k. What was the original 6dB x-over point?
The woofer spec sheet shows a rise at 2k. Since you don't have EQ, maybe you can spread the filter frequencies. In other words, low-pass the woofer at something like 1.8k, while leaving the mids at 2k. Maybe you are already doing this, but your measurement looks like there is more overlap at 2k than ideal.
Actually, I wonder if you can cross even lower. Maybe 1.2k is reasonable. Some power handling may be compromised, but I suspect that the mids might sound better at 1.5k than the woofers.
Do you play the system loud with music, or action movies?
The mids could probably be crossed lower than 2k. What was the original 6dB x-over point?
The woofer spec sheet shows a rise at 2k. Since you don't have EQ, maybe you can spread the filter frequencies. In other words, low-pass the woofer at something like 1.8k, while leaving the mids at 2k. Maybe you are already doing this, but your measurement looks like there is more overlap at 2k than ideal.
Actually, I wonder if you can cross even lower. Maybe 1.2k is reasonable. Some power handling may be compromised, but I suspect that the mids might sound better at 1.5k than the woofers.
Do you play the system loud with music, or action movies?
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I can remember reading in Audio magazine when this speaker was first sold. The midrange drivers would have been fine crossing over at 100HZ. Guessing a passive crossover was easier to pull off at 290HZ instead. Bi-amping was not done near as much back then.
The original 17W75 mids were designed to work with a first order crossover at about 2K. They would drop off fairly fast above 2K and not show any breakup peaks in the 2-4K range.
The original 17W75 mids were designed to work with a first order crossover at about 2K. They would drop off fairly fast above 2K and not show any breakup peaks in the 2-4K range.
I was (still am) a newbie and just threw my box of LCR ammo at the problem. I had "associated" dynamic bass with active-LPF (monitors) so was quite blown away by the aircores result.
Details IIRC: (volume-balance)R->air9mH||litz2.2mH->1R->upfiring-closed17L-8"MoRST(w/phaseplug), so effectively 1.8mH on driver impedance+1ohm(tweak)+inductors'R (litz very low but monster Jantzen 9mH aircore 2.6ohm, how to figure?). In other words, confusing, but tuned/tweaked/aligned with the inner R. Upfiring to attenuate >2khz, it integrated very well with port-plugged tiny 5" Studio 2. (The original Monitor Audio Studio 60 was also 2.5-way all 1st-order.)
Often when people make comparisons of active bass, the smaller series resistance produces a lower Q response. You don't want to confuse this with damping factor, or assume it's something to do with active or digital.
Simply, lower Q bass is lighter but can sound cleaner. It doesn't matter how you get there.
If it sounds cleaner but you wish it was not so light, then you have other problems to fix. Once you get it right it will sound good in all ways and you won't want to change it.