8-pre Owner’s Manual v2k10 CE ©2010 ARX®
8-pre Owner’s manual v2k10 CE ©2010 ARX®
5
4
Front Panel
Rear Panel
• XLR Input connectors.
Balanced Input connector wired Pin 1 Ground, Pin 2+
(Hot), Pin 3 – (Cold)
• Jack Output Connectors.
A ¼” TRS (TipRingSleeve) balanced output jack (will
happily accept unbalanced guitar jack). Wired Tip +, Ring –, Sleeve Ground
• 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. Please also refer to voltage
details on Page 2
• 48 V Phantom 1 - 4
Provides 48V DC on XLR pins 2 and 3 for powering con-
denser microphones on Channels 1 through 4
• Pad switch
Reduces the incoming signal by 20 dB
• Gain trim control
Adjusts the level of the signal coming into the 8
-pre
• Clip LED
Will light up 1 dB before any part of the 8
-pre
channel is about to clip
(and distort the signal)
• Ø Reverse switch
Flips the polarity of the incoming signal 180 degrees
• Numbered Marker Panel
A ‘scribble-strip’ for writing down channel assigns
• 48 V Phantom 5 - 8
Provides 48V DC on XLR pins 2 and 3 for powering
condenser microphones on Channels 5 through 8
• AC Power LED
Indicates the 8
-pre
is connected to AC Power
Architects’ and Engineers’ Specifications
The unit shall consist of 8 independent microphone pre amplifiers, mounted in a
standard 1 RU all steel chassis with extruded aluminium front panel.
Each pre-amplifier shall have a balanced female XLR input connector and a balanced
Tip-Ring-Sleeve output connector mounted on the rear panel.
Each pre-amplifier shall have a Gain trim control on the front panel, variable from 20 dB
through to 60 dB. Each pre-amplifier shall also have -20 dB Pad switches and Phase
change switches.
48 V DC Phantom power shall be available on each input, switchable in banks of four,
ie: Channels 1 through 4, and Channels 5 through 8.
The Signal to Noise ratio @ 20 dB shall be –93dB unweighted. Input impedance shall
be 4 KOhms, and the output impedance shall be 300 Ohms.
Maximum Output Level shall be +23dB
AC power range shall be switchable 100 to 120V or 220 to 240V AC, and shall be
connected to the unit via a standard three pin IEC connector, with built-in fuse and
voltage change switch.
The unit shall be the ARX 8
-pre