Meyer Sound LD-3

Beschrijving

Atmospheric Correction ( Affects Output Channels 1-3, Both A&B) | Temperature: 0° to 45° Celsius | Relative Humidity: 10 to 100% RH | Altitude: 3 position switch: 0 to 800, 800 to 2200, 2200 and up | Distance: See “Outputs: Channels 1-3 (A&B)” | Array Correction: | Type: M1D, M2D, MILO, M3D, upgradable Remote Setting | Array Size: 1 to 24 Elements in the array (If set to 1 element, bypasses array correction) | Master Inputs: | Attenuation Control: -12dB to +6dB | Mute: Master mute, controls output mutes | Outputs: Sub Out | Attenuation Control: 6 to +6 dB | Mute: Mutes at the output stage | Polarity Switch: Toggles the polarity of the sub output | Low-Pass Filter/Crossover: 3 position switch: OFF, 55 Hz and 80 Hz | Insert Switch: When switch is “in” it disconnects Master signal from Sub signal path and allows only Sub Insert/Return XLR to drive Sub signal path. When switch is “out” the Master signal and Sub Insert XLR are summed onto the Sub signal path. Master signal is muted if switch is “in” and no signal is present at Sub Insert. Sends and Inserts operate 3 dB lower than Master signal, therefore signals applied to Sub Insert XLR will have 3 dB greater gain through LD-3 | Signal/Clip Indicator: Glows green with signal and red when output is in clipping | Outputs: Channels 1-3 (A&B) | High-Pass Filter/Crossover: 3 position switch: OFF, 80 Hz and 160 Hz. Affects all 3 channel outputs | Attenuation Control: -6 to +6 dB (-6 to -3 and +3 to +6 settings not recommended to preserve array behavior) | Distance: 1 to 150 m; works in conjunction with the Atmospheric Correction section (If set to 0 m, bypasses atmospheric correction) | Mute: Mutes at the output stage | Insert Switch: Toggles the input from Master to Insert/Return. Not normalized, mutes channel when engaged if no signal is present at Insert/Return | Signal/Clip Indicator: Glows green with signal and red when output is in clipping | Maximum Correction Indicator: Glows when the correction has reached 16 dB at 16 kHz | Audio Inputs | Type: Differential balanced input circuit | Impedance: 10 kΩ differential (between pins 2 and 3) | Wiring: Pin 1: chassis/earth ground; Pin 2: signal (+); Pin 3: signal (-) | RF Filter: Common Mode: 425 kHz low-pass, Differential Mode: 142 kHz low-pass | Common Mode Rejection Ratio: >80 dB (typically 90 dB); measured in the range 50 Hz – 1 kHz | Signal Presence: LED (Variable intensity; monitored at the input for each channel) Threshold: -26 dBV (50 mV rms) pink noise or sine wave Full Intensity: -10 dBV (300 mV rms) pink noise or sine wave | Input Connectors: | Master A & B: 2 Female XLR; 1 per input channel | Insert/Return: Sub Input: 2 Female XLR; 1 per input channel | Channels 1-3 (A&B): 6 Female XLR; 1 per input channel; Insert is Pre-Atmospheric, Correction / Post-High Pass Filter/Crossover | Audio Outputs: | Type: Balanced, cross-coupled simulated transformer topology | Impedance: 50 Ω balanced (between pins 2 and 3) | RF Filter: | Pins 2 and 3 shunted to chassis via 500 pF capacitance | Wiring: Pin 1: chassis/earth ground; Pin 2: signal; Pin 3: signal | Drive Capability | Maximum Voltage: 600 Ω Load: ±17.8 V pk (+22 dBV, +24.2 dBu sine wave); No Load: ±19 V pk (+22.5 dBV, +24.7 dBu sine wave | Maximum Current: ±70 mA pk (10 V rms into 200 Ω) | Cables and Load: >100,000 pF (> 1000 ft cable) without instability or distortion | Output Connectors: | Sub Output: 2 Male XLR; 1 per output channel | Channels 1-3 (A&B): 6 Female XLR; 1 per output channel | Full Range Pre Send output: 2 Male XLR; 1 per output channel; Send is Pre-Array, Pre-Atmospheric correction | Full Range Post Send output: 2 Male XLR; 1 per output channel; Send is Post-Array, Post-Atmospheric correction | Post Array and HPF: 2 Male XLR; 1 per output channel; Send is Post-Array, Post-Atmospheric correction and Post High-Pass filter/Crossover | Audio Performance | Frequency Response: <±0.2 dB 20 Hz - 20 kHz (All corrections disabled) | Dynamic Range: >110 dB | Noise Floor: >-90 dBV A-weighted; >-88 dBV un-weighted | THD: <0.02% (typically 0.005%) | Gain Accuracy: <±0.15 dB at +6 dB gain; <±0.25 dB at 0 dB gain | Mute Attenuation: >88 dB | AC Power | Connector: IEC 320 (line, neutral/line, earth) | Operating Voltage: 105 – 125 V AC, 210 – 250 V AC (selectable with rear panel switch); 50/60 Hz | Maximum Power: 25 W; Fuse: 5 x 20 mm, T 250 mA, 250 V, time-lag