NAS BMA 120, Installation & Operation Manual

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BMA SERIES: INSTALLATION & OPERATION MANUAL PAGE 7
REAR PANEL
7. Mains Socket: The unit is connected to the mains circuit with a standard IEC type power lead.
This socket contains a rated slow blow fuse.
**NOTE: Only use a fuse equal to the marked rating
• BMA 30 uses a T1.25AH slow blow fuse
• BMA 60 uses a T2AH slow blow fuse
• BMA 120 uses a T5AH slow blow fuse
• BMA 240 uses a T8.0AH slow blow fuse
8. Loudspeaker Outputs:
When connecting low impedance loudspeakers use the COM and 8Ω connections.
For 70V and/or 100V loudspeakers use the COM and 70V or 100V connections.
For 70V or 100V operation, the total minimum impedance of the loudspeaker lines should not overload
the amplifier. Refer to the above installation guide for how to calculate the loudspeaker load or
measure with an impedance meter.
Use only one of the loudspeaker connections. Do not combine both 8Ω and 70V/100V loudspeaker
connections.
9. Pre-Out/Main-In: If required the output signal can be sent from the pre-amplifier of the mixer to an
external device such as an equaliser or processor and the processed signal can be fed back into the
amplifier via the Main-In connection. If this feature is not used ensure the RCA link is connected across
the Pre-Out/Main-In. If this link is lost the unit will not pass audio signals connected to the unit.
10. Input 1 Mic/Line: This microphone input features 48V phantom power for powering Condenser
Microphones. The Vox level pot sets the threshold of the internal Priority Mute level. Microphone 1 input
can mute all other inputs. The input selector switch is used to choose between the Microphone or Line
input. The Microphone input can be connected to either the 3pin XLR or the Phoenix terminal. The line
input can be connected to the Dual RCA inputs or to the Phoenix terminal. The Dual RCA is internally
summed for mono.
11. Inputs 2,3,4 Mic/Line: The input selector switch is used to choose between the Microphone or Line input.
The Microphone input can be connected to either the 3pin XLR or the Phoenix terminal.
The line input can be connected to the Dual RCA inputs or to the Phoenix terminal.
The Dual RCA is internally summed for mono.