When I was first listening to my Heil set-up using 121A Mr. Widget brought up the fact that they have quite a bit of mass because of the mass ring. He's right compared to the Le14 series the 121A is about 20 grams heavier.

The most common comparison with respect to differences in moving mass is the 2234 and 2235 drivers. The 2235 is 35 grams heavier.

I know there are many anecdotes about how the 2234 is a superior driver into the midrange. The question is has anyone done a comparison between the 2 where they were compared using EQ where they both measured the same??


His statement got me thinking as to what we are actually hearing. Is it the differences in the frequency response without EQ?

Is it the mass making one driver "faster"?

Is it a combination of both?

If so which is the biggest contributor?

Rob