ohhh, so I really shouldn't look at those graphs a reference or a good representation of what to expect installed in my vehicle? For example, I look at this driver: http://www.usspeaker.com/ciare%201200sw-1.htm Now, by manufacture, it recommends 20hz-200hz. But looking at the graph, it "seems" to play relatively well up into about 1khz. So, just because it looks good on the graph, doesn't mean it plays good? Is that what you're saying? No, that response is only when the driver is facing directly in front of you. And this is with any driver. This normally isn't a problem with home audio as the drivers are more or less in front of you.