Hello, According to the JBL 4612 OK spec sheet one of the two 2118J 8" woofers is restricted to the low-frequency region only ? What is the low-frequency region of the one woofer ? The 1st 2118J 8" woofer frequency range is from 60 hertz to the 3 kHz crossover point. The 2nd 2118J 8" woofer frequency range is from 60 hertz to ? Is the JBL 4612 OK crossover network a 3 way crossover network ? JBL Spec sheet states: The frequency dividing network shall have a crossover frequency of 3 kHz and shall be of the L-C high-pass type. An additional inductor shall restrict the response of one woofer to the low-frequency region only. Polypropylene and/or polystyrene bypass capacitors shall be wired in parallel with the network’s larger mylar or non-polarized electrolytic capacitors to reduce the hysteresis effects on the signal. JBL 4612 OK crossover schematic attached. Thanks. Mr Wizard