Symetrix ARC-K1 - Page 10

10
Quick Start Guide
6408 216th Street SW | Mountlake Terrace, WA 98043 USA
T +1.425.778.7728 F +1.425.778.7727 | www.SymetrixAudio.com
MIC
EachRS-485address(eachbrain
board)canhaveoneMICorXLR.
ThereisnoBoardIDtosetonthe
MIC, however some wiring and
jumpers must be properly placed.
The diagram below specifies the
necessary connections.
XLR
(input with gain)
EachRS-485address(each
brain board) can have one MIC
orXLR.ThereisnoBoardIDto
setontheXLR,howeversome
wiring and jumpers must be
properly placed. The diagram
below specifies the necessary
connections to configure the
XLRjackforamicrophoneinput
with46dBofgain.Nophantom
power is supplied and phantom
power must not be present on
the ARC Audio lines or damage
totheXLRwilloccur.This
configuration is useful for a local
dynamic paging or intercom
mic. The input from the mic is
boosted to nearly line level for
long distance transmission over
ARC Audio.
J1: Modular ARC
Expansion Bus
Connects to the
brain board or
expansion board
with the next lowest
BoardID.
J4: ARC Audio
Connects to
J13 on the brain
board.
J2: Electret Mic Connect/
Enable
Electret capsule wires
to pin 1 (+) and pin 2 (-).
Jumpers 3/4 and 5/6 must
be placed in order to enable
the electret and supply
necessarygain(46dB).
J3: XLR
Not used for electret mic.
J1: Modular ARC
Expansion Bus
Connects to the
brain board or
expansion board
with the next lowest
BoardID.
J4: ARC Audio
Connects to J13 on
the brain board.
J2: Electret Mic
Connect/Enable
No jumpers placed
whenXLRisused.
J3: XLR
Audio lines from the
XLRjackconnecthere
to be amplified then
sent over ARC audio.
Hardware Setup