The AN-J The AN-J models offer higher sensitivity and better bass performance, combined with a more dynamic presentation than the AN-K, in an enclosure that is about three times the volume. The AN-J is a ported enclosure with an efficiency better than 93 dB/m and bass that goes down to 25 Hz at -6 dB. The AN-J is capable of reproducing the scale and intensity of most well-recorded music very realistically. Like all our other loudspeakers, the AN-J undergoes the same painstaking driver selection and matching process, which ensures the closest tolerances within a pair in the entire audio industry.   SAMPLE FINISH:  Birch Burl  Maple  Apple  Oak  Indian Rosewood                                       Alder  Makassa  Madrone  Poplar Burl  - Finishes availability depends on speaker model and product availability.