Well, that was just the ad, not the literature. And since this bass driver is smaller and seems to be the one from the 1.6, I wouldn't doubt that it presents a kinder load. But the fact that it is being called upon to extend lower in frequency range in the 2.4 would help explain why the speaker's sensitivity is rated at 87dB rather than 90dB as in the 1.6. Even though the cone diameter drops from 8" to 6.5", the 3" voice coil might well be bigger than was the case in the 2.3. Still, the smaller driven area might imply less dynamic range. I wonder if the 3-series replacement will go from the current model's 10" woofer down to an 8", leaving the 6-series with the 10".