One of the two 2118J's has a 1.2 mH inductor in series with it in the crossover. I believe that's a 6 dB/octave low pass filter at about 1500 Hz, depending upon the actual driver impedance at the design frequency. Apparently, a single 2118J has sufficient output in the upper midrange, but two are required for good balance below that frequency.Originally Posted by pentictonklaus
I have a pair of them here, and I wouldn't hesitate to use them as mains, even.
A single 2118H was used as midrange between 2404 and E145 in 4628(B), another one of my favorite systems.
See also http://www.jblsynthesis.com/products...=US&Region=USA