MSX 8 Owner's Manual v 3 CE ©2010 ARX®
MSX 8 Owner's Manual v 3 CE ©2010ARX®
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Front Panel Connectors and Controls
• A and B balanced XLR Output splits Channel 1. Pin 3 -, Pin 2 +, Pin 1 Ground (Standard:
electronic; Optional: transformer isolated)
• –20dB pad switch and status LED
• Channels 1 and 2 Link switch and status LED
• 48V Phantom Power switch and indicator LED
Rear Panel Connectors
• Balanced XLR Input Channels 1 and 2. Pin 3 –, Pin 2 +, Pin 1 Ground
• Gain DIP switches: 0dB, +10, +20, +30, +40dB
• Balanced XLR Main (FOH) Output (same wiring as Input) Channels 1 and 2
• Balanced XLR Monitor Output (same wiring as Input) Channels 1 and 2
• 12V DC DIN connector for applications requiring remote power
• IEC 3 pin AC connector and integral fuseholder. Replace fuse with correct value only:
100–120 V AC 1 amp, 220–240 V AC 0.5 amp.
Note: No connection to Audio ground on transformer balanced models (T/S and
T/ALL)
• Numbered marker panel for labelling microphone channel assigns
• AC Power status LED
Channel 2 connectors and controls identical
Architects’ and Engineers’ Specifications
The Active Microphone/Line Splitter shall be a two channel unit in a steel chassis six inches (200mm)
deep and one rack unit (44mm) high.
Each channel shall have its input and two outputs on the rear panel plus two outputs on the front
panel. Each channel shall also have a 48V Phantom power switch on the front panel with an
indicator LED and a –20 dB pad switch with an indicator LED.
There shall also be afront panel switch with an indicator LED to link both channels, thereby
providing a maximum of 8 outputs from one input.
The Input headroom shall be +21dB, with a CMRR of better than 70dB, and the frequency re-
sponse shall be 10 Hz to 20 KHz, ±0.5dB.
The Output impedance shall be 100 ohms electronically balanced on all four outputs per chan-
nel. Additionally all outputs shall have the option of being transformer balanced.
The maximum Output level shall be +24dB, with a Signal to Noise ratio of –94dB unweighted. Total
Harmonic Distortion shall be 0.008% @ 0dB, 20 Hz to 20 KHz.
Gain through the unit shall be switchable to 0, +10, +20, +30, +40dB via rear panel switches.
AC power shall be supplied by a removable 3 pin mains cable, connecting to an IEC connector
with integral fuse and voltage change switch on the unit’s rear panel.
The Active Microphone Splitter shall be the ARX MSX 32.
