The loudspeaker shall be a compact, self-powered, linear, low-distortion, low-frequency control element and shall be capable of flown, ground-stacked, and cardioid configurations. Its transducer shall be one 18 in dual-coil long-excursion cone driver.
The loudspeaker shall incorporate internal processing and a two-channel, open-loop, class D amplifier. Processing shall include equalization, phase correction, and driver protection. Performance specifications for a typical production unit, measured at 1/3-octave resolution, shall be as follows: operating frequency range shall be 30–125 Hz; frequency response shall be 32–115 Hz ±4 dB (measured in half-space with pink noise at 4 m, 1/3-octave frequency resolution); phase response shall be 40–110 Hz ±30°; linear peak SPL shall be 133 dB, measured in half-space with M-noise at 4 m referred to 1 m.
Audio connectors shall be XLR 3-pin, female and male, accommodating balanced audio, or XLR 5-pin, accommodating both balanced audio and RMS.
The internal power supply shall perform EMI filtering, soft current turn-on, and surge suppression. Power requirements shall be nominal 100, 110, or 230 V AC line current at 50–60 Hz. UL and CE operating voltage range shall be 100–240 V AC at 50–60 Hz. AC power connectors for input and loop output shall be powerCON 20. Maximum long-term continuous current draw shall be 4.9 A rms at 115 V AC, 2.5 A rms at 230 V AC, and 5.2 A rms at 100 V AC.
The loudspeaker shall include an RMS remote monitoring system module.
Components shall be mounted in an optimally tuned, vented enclosure constructed of premium multi-ply birch with a slightly textured black finish. The front protective grille shall be powder-coated, hex-stamped steel with acoustical black mesh. Optional rigging for the enclosure shall include endframes with captive GuideALinks for linking units in vertical arrays at splay angles of 0°, 1.25°, 2.5°, 3.75°, or 5°. Dimensions without rigging shall be W: 27.43 in (697 mm) x H: 24.43 in (621 mm) x D: 24.89 in (632 mm). Dimensions with optional rigging shall be W: 27.47 in (698 mm) x H: 24.43 in (621 mm) x D: 24.89 in (632 mm). Weight shall be 136 lb (61.7 kg). Weight with optional rigging shall be 159 lb (72.1 kg).
The loudspeaker shall be the Meyer Sound 900-LFC
Keyword: Subwoofer, Subwoofers, Loudspeaker, Loudspeakers