Hi jharden, The 2426 rolls off quite a lot in the top 2 octaves for an 811B. Some really like that sound. 811's actually sound better to my ears with a driver that's fairly hot on top. 811's are incredible with the right driver, but they don't have the coverage of a 2370A. The directivity and response of these two is just so different they are hard to compare. As for the efficiency, JBL's are louder near cutoff, but you have to compensate them a lot to even get close to flat, so you lose the juice in the L-pad. An 811B is nearly flat with a PSD 2002 and a 6dB comp so it cam be louder in a passive system. You can use a smaller capacitor with an 811 to match a quiet woofer, but you can't use a 2370 with a real loud woofer, unless you use active crossover/EQ. They are two different tools for different worlds. Thomas
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