Dude, I'm an electrical engineer. I know how to read those things. The problem is that specifications for speakers aren't really useful because real music isn't a sine wave of increasing frequency and the spec sheets conceal a lot of shortcuts and bad design factors. Every speaker is rated 20 to 20k, but that doesn't mean it really is linear across that range or actually hits the targets.
Many speakers lack impedance compensation and poorly reproduce music but the frequency response chart looks sort of ok because it's been re-jiggered for that. Change the scale and all that.
Then there are the issues of cored inductors vs. air core, and electrolytics vs. film. Or bypassed film vs. unbypassed film. Not present on the chart.
Or a reversed midrange because someone didn't understand the difference between phase shift and polarity. (Yeah, who but an engineer would understand that. Ok, maybe someone with ears that worked?) Again, not present on the chart, but certainly audible.
Plus cabinet resonance.
The biggest issue is phase shifts and group delay from higher-order crossovers and poorly designed baffles. Doesn't show up on the chart, but this is audible. Higher-order crossovers have more phase shift than Elvis doing his shimmy on The Dorsey Brothers Stage Show.
None of that shows up in the printed specifications. Which is a problem. Because it makes the speakers sound bad.
Ok, it doesn't show up in the reviews either, because the reviewers are cargo cultists who probably couldn't tell any the difference between the speakers being reviewed and a pair of ear buds.