I've always been someone who does months and months of research and comparing specs before I rush out and by ANY speakers. My 5-way Pioneers have the best frequency response of pretty much ANY 6x9 I've found in years! But I was VERY impressed by the low impedance of the Infinity Kappa speakers, but TONS of people told me I would NOT be happy with them! They didn't get all that many super positive reviews either. So, I went with the JBL GTO930 6x9's! Thought I would be SO impressed! NOT!!! I only had them installed for less than a half hour before I wanted to put my Pioneers back in! And that's exactly what I'm going to do! The Pioneer TS-A6990F 6x9's may not be 2.5 ohm speakers but at least they have MUCH better frequency response compared to the JBL's! They handle more power too!
I'm so bummed that I spent over $200 with tax on these JBL's! Now they're coming back out and the Pioneers are going back in! I'll then sell the JBL's on OfferUp or Craiglist or Facebook Marketplace. I'm just NOT AT ALL impressed with them!
They sound muddy, with NO highs, even with the fancy high frequency button on them! So sad that the most I've EVER spent on 6x9's in my life was such a waste of money! And I'm not even going to open the JBL GTO629 6.5's box! I'm going to list them for sale as brand new, unopened. Which they are! If the 3-way 6x9's can't compete with the Pioneer 5-way 6x9's, I have no doubt in my mind that the 2-way 6.5's won't compete with the Pioneer 4-way 6.5's!
The GTO's are the same PLASTIC BASKETS as the Infinity Kappas, so THAT part didn't impress me at all. The most impressive thing about these speakers is their speaker terminals! I was able to use wire ferrules to connect the wires. VERY nice! But 80% plastic did NOT impress me very much.
I had a funny feeling switching from 5-way 6x9's to 3-way would be a bad thing, but now I can confirm it. That 2.5 ohm thing apparently means nothing when it comes to frequency response. These things don't get even HALF the mids and highs that the Pioneer's got!
Just my personal opinion from less than an hour of playing them!