Power Requirements
Understanding power distribution, voltage and current requirements, and electrical safety guidelines is critical to the safe operation of 2100-LFC loudspeakers.
Sufficient power must be provided for the loudspeakers to accurately reproduce the full dynamic range of the input signal, especially during periods of maximum acoustic output.
AC Power Distribution
All components in an audio system (self-powered loudspeakers, mixing consoles, processors, etc.) must be properly connected to an AC power distribution system, ensuring that AC line polarity is preserved. All the grounding points of the audio system components must be connected to a single node or common point using the same cable gauge (or larger) as the neutral and line conductors.
Caution
The nominal operational AC mains voltage range is 200–240 V AC.
The voltage between the earth/ground and line should never exceed 264 V AC or be less than 160 V AC.
Before applying AC power to any Meyer Sound self-powered loudspeaker, make sure the voltage potential difference between the neutral and earth/ground conductors is less than 5 V AC when using single-line AC wiring (LINE - NEUTRAL - EARTH/GROUND).
Before applying AC power to any Meyer Sound self-powered loudspeaker, make sure the voltage potential difference between the neutral and earth/ground conductors is less than 5 V AC when using single-line AC wiring (LINE - NEUTRAL - EARTH/GROUND).
Before applying AC power to any Meyer Sound self-powered loudspeaker, make sure the voltage potential difference between the neutral and earth/ground conductors is less than 5 V AC when using single-line AC wiring (LINE - NEUTRAL - EARTH/GROUND).
Branch Circuits
To reduce the number of branch circuits, it is common to connect two 2100-LFC loudspeakers to one branch circuit, provided the circuit breaker is sufficiently rated. To reduce the impedance of the conductors, minimize the length of cable after the branch circuit has been “split.” Typically, a single circuit cable is split very near the loudspeakers using a molded split, junction box, or wye cable.
230 V AC, 3-phase Wye System (Single Line)
Line-Neutral-Earth/Ground
The figure below illustrates the secondary of a 230/400 V AC, 3-phase Wye distribution system. Each loudspeaker is connected to one of the lines, the neutral, and the earth/ground. This distribution system delivers 230 V AC to each loudspeaker.
Caution
For 230/400 V AC, 3-phase Wye systems, never connect two lines to the AC input of 2100-LFC. 400 V AC significantly exceeds the upper voltage limit of 264 V AC and will damage the loudspeaker.
120 V AC, 3-phase Wye System (Two Lines)
Line-Line-Earth/Ground
The figure below illustrates the secondary of a 120/208 V AC, 3-phase Wye distribution system. Each loudspeaker is connected to two lines and the earth/ground. This configuration is possible because 2100-LFC loudspeakers tolerate elevated voltages from the earth/ground conductor and do not require a neutral line. This distribution system delivers 208 V AC to each loudspeaker.
Three-Phase, 120/208 Volt AC Transformer Secondary, Wye Configuration and Loudspeaker Connections
Caution
Do not connect a 2100-LFC loudspeaker to only one line of a 120/208 V AC Wye service as the voltage delivered will be 120 V AC, below the operating voltage range.
AC Input
The 2100-LFC user panel includes an AC inlet connector. The 3-conductor Neutrik powerCON TRUE1 True Outdoor Protection (TOP) locking connector supplies electrical power to the loudspeaker, as shown in the figure below.
Caution
Presence of water or other conductive liquids in the AC connectors creates a shock/electrocution hazard.
The inlet connector is certified for outdoor protection (IP65, UL50E) only when mated with a Neutrik powerCON TRUE1 TOP cable-mount connector, or when the connector is not in use, when the sealing cap is fully inserted.
Check the sealing cap for moisture before covering the connector. If wet, dry the cap before covering the connector to avoid introducing liquid to the connector.
User Panel, Power Inlet, Neutrik powerCON TRUE1 TOP Connector
The powerCON TRUE1 TOP connectors can be engaged or disengaged while the circuit is energized without damaging the connectors over time, provided both connectors are rated for energized connection.
Caution
Make sure the AC inlet connector assembly is secure and has not been damaged during prior use or transportation before connecting the power cable.
Assembly of Power Cables
A cable-mount Neutrik powerCON TRUE1 TOP connector is included with each 2100-LFC loudspeaker (Neutrik NAC3FX- W-TOP) enabling users to assemble power cables to meet their needs.
Caution
Correct assembly of the powerCON TRUE1 TOP connectors is required to achieve the IP65 rating, preventing water ingress. Improperly assembled connectors pose a shock/ electrocution hazard.
Visit the Neutrik website (neutrik.com) to download the cable preparation and connector assembly instructions for the powerCON TRUE1 TOP NAC3FX-W-TOP cable-mount connector.
For 2100-LFC power cables, all conductors must be 12 AWG (2.5 mm²).
Use only cable with an outer jacket diameter between 1/4-in [6 mm] and 1/2-in [12 mm].
For the inlet end of the cable, the plug must be rated for at least the current draw of a 2100-LFC (1200 watts divided by supply voltage) and be approved for use in the region where the product will be used.
The pins of the powerCON TRUE1 TOP cable mount connector are labeled as follows:
L (Line)
N (Neutral)
(Protective Earth or Ground)
Neutrik powerCON TRUE1 TOP Cable Mount Connector
Caution
Careful attention should be paid when terminating these connectors to ensure the proper conductor of the cable is connected to the intended terminal. The terminal identification markings inside the connector can be difficult to identify. After terminating the conductors, we strongly advise using a continuity meter to verify the proper connections are made, preventing a shock hazard and/or damage to the loudspeaker.
How AC power cables are wired is determined by the type of AC power distribution system used (see AC Power Distribution.
Caution
When wiring AC power cables and distribution systems, it is important to preserve AC line polarity and connect the earth ground at both ends of the cable.
2100-LFC Voltage Requirements
The AC mains voltage range at the loudspeaker AC inlet must be between 160 V AC and 264 V AC while the loudspeaker is operating, including periods of peak acoustic output when the loudspeaker draws maximum current.
Because the 2100-LFC behaves as a constant power load, current increases if the voltage decreases at its AC inlet. The maximum round-trip resistance of the cable for a single 2100-LFC should not exceed 5 Ohms for a 230 V AC source voltage because the AC Mains voltage will fall below 160 V AC at the AC inlet.
Caution
2100-LFC may be damaged or may malfunction if the inlet voltage is greater than 264 V AC or less than 160 V AC.
Circuit Breaker Requirements
The circuit breakers used in the Meyer Sound MDM-5000 are well suited for use with 2100-LFC loudspeakers and other Meyer Sound products:
European MDM-5000 includes ETI model number: KZS- 1M 1p+N A C16/0.03, 6kA, which includes an RCD (residual current device) with a C-type tripping time constant and 30 mA RCD.
US MDM-5000 includes Eaton model: QCR2020 - CIRCUIT BREAKER 2-Pole, 20 A, 120/240 V AC
Circuit protection devices for main and branch circuits of any power distribution system used in conjunction with 2100-LFC loudspeakers should use similarly specified devices to avoid nuisance tripping.
Note
Many RCCB’s (residual current circuit breakers) are sensitive to high-frequency noise in the Line-Neutral path and may false/nuisance trip. If required, make sure residual current devices are not sensitive to high-frequency noise or artifacts. Conductor-to-conductor capacitance can cause an imbalance between the current carrying conductors in a cable or a conduit, potentially causing RCCB nuisance tripping. Consult with a licensed electrician or electrical engineer when designing electrical distribution systems.
Power Supply
The 2100-LFC’s power supply eliminates high inrush currents with soft-start power up, suppresses high-voltage transients up to several kilovolts, and filters common mode and differential mode radio frequencies (EMI).
Powering on 2100-LFC
When powering on 2100-LFC, the following startup events take place over several seconds:
The Active/Status LEDs flash during initial startup.
When both the Active/Status LEDs turn solid green, the loudspeaker is unmuted and ready to reproduce audio.
Caution
If the Active/Status LEDs do not turn solid green after 30 seconds, remove AC power and verify that the voltage is within the required range and the conductors of the power cable are connected to the proper terminals of the connectors. If the problem persists, contact Meyer Sound Technical Support.
If the Active/Status LEDs pulse red or yellow after the loudspeaker has been powered on longer than 30 seconds, an error has been detected. The details of the error are reported in Meyer Sound’s Nebra software via the network connection.
Electrical Safety Guidelines
Make sure to observe the following important electrical and safety guidelines.
Do not operate the unit if the power cable is frayed or broken.
Use the cable rings on the rear of the cabinet to reduce strain on the connected cables. Do not use the cable rings for any other purpose.