d&b audiotechnik E15X 15-Inch NL4 Passive Subwoofer 100697853 It also offers improved image

It also offers improved image sharpness and better lateral performance

Swivel housing: Yes

Element: Condenser

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d&b audiotechnik E15X 15-Inch NL4 Passive Subwoofer 100697853 It also offers improved imaged&b audiotechnik E15X 15 Inch NL4 Passive Subwoofer The E15X SUB is a compact, lightweight, high performance subwoofer for use with d&b E Series loudspeakers. The built in passive crossover network allows the E15X SUB to be operated in parallel to E12 or E12 D loudspeakers on the same amplifier channel, greatly extending the low frequency headroom and bandwidth of the systems. Alternatively it can be operated actively driven by its own amplifier