Architectural Specifications
The loudspeaker shall be a self‑powered stage monitor; its transducers shall include two 10‑inch cone drivers and one 4‑inch diaphragm compression driver on a 50° x 70° horn. The loudspeaker shall incorporate internal processing electronics and a three‑channel amplifier, one channel for each driver. Processing functions shall include equalization, phase correction, signal division, and protection for the low‑ and high‑frequency sections. Amplifier channels shall be class D. Distortion (THD, IM, TIM) shall not exceed 0.02%.
Performance specifications for a typical production unit shall be as follows, measured at 1/3‑octave resolution: operating frequency range, 55 Hz to 18 kHz; phase response, 200 Hz to 16 kHz ±45°; linear peak SPL shall be 134 dB with crest factor > 17 db measured with M‑noise, 1 m on axis with typical boundary loading. Coverage shall be 50° horizontal by 70° vertical.
The audio input shall be electronically balanced with a 10 kΩ impedance and accept a nominal 0 dBV (1.0 V rms) signal. 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 automatic voltage selection, 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. Maximum instantaneous peak current draw shall be 8.1 A peak at 115 V AC, 3.9 A peak at 230 V AC, and 9.3 A peak at 100 V AC. Current inrush during soft turn‑on shall not exceed 20 A peak at 115 V AC. AC power connectors shall be powerCON 20 with loop output.
The loudspeaker shall optionally include the RMS remote monitoring system module.
Loudspeaker components shall be mounted in an acoustically‑vented, wedge‑shaped enclosure constructed of premium multi‑ply birch with a slightly textured black finish. The protective grille shall be hex stamped steel with black mesh screen. Dimensions shall be W: 23.18 in (589 mm) x H: 13.89 in (353 mm) x D: 20.90 in (531 mm). Weight shall be 67 lb (30.4 kg). The enclosure’s front angle shall be 35°.
The loudspeaker shall be the Meyer Sound MJF‑210.