Architectural Specifications
The loudspeaker shall be a linear, low‑distortion, self‑powered, very low‑frequency control element and shall be capable of flown, groundstacked, and cardioid configurations. Its transducers shall include two 18‑inch long‑excursion low‑resonance cone drivers.
The loudspeaker shall incorporate internal processing and a 2‑channel Class AB/H amplifier with complementary MOSFET output stages. Protection circuits shall include TruPower limiting. The audio input shall be electronically balanced with a 10 kΩ impedance and accept a nominal 0 dBV (1.0 V rms) signal (+20 dBV to produce maximum peak SPL). Audio connectors shall be 3‑pin XLR, female and male, accommodating balanced audio, or 5‑pin XLR, accommodating both balanced audio and RMS.
Performance specifications for a typical production unit shall be as follows, measured at 1/3‑octave resolution: operating frequency range shall be 13–35 Hz; frequency response shall be 13 Hz–30 Hz ±4 dB (measured in half‑space with pink noise at 4 m, 1/3‑octave frequency resolution); phase response shall be 13 –30 Hz ±30°; linear peak SPL shall be 125.5 dB with crest factor >10.5 dB, measured in half‑space with M‑noise at 4 m referred to 1 m.
The internal power supply shall perform EMI filtering, soft current turn‑on, and surge suppression. Power requirements shall be nominal 230 V AC line current at 50 or 60 Hz. UL and CE operating voltage range shall be 208–235 V AC. Current draw during burst shall be 18 A rms at 230 V AC. Current inrush during soft turn‑on shall not exceed 30 A at 230 V AC. The AC power connector shall be a PowerCon32. 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 and coated with a slightly textured black finish. Dimensions and without optional rigging shall be 54.65 in (1388 mm) wide x 20.48 in (520 mm) high x 33.00 in (838 mm) deep. Weight shall be 298 lb (135.2 kg). Weight with optional rigging shall be 332 lb (150.7 kg).
The loudspeaker shall be the Meyer Sound VLFC.