Australian Monitor JUNCTION BOX User Manual

JUNCTION BOX

EXT. in

EXT. out

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www.wes.net.au

INSTALLATION AND OPERATION MANUAL

INFORMATION

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www.wes.net.au

CONNECTING THE JUNCTION BOX TO YOUR
AUDIO SOURCE

Plug the Junction Box into your audio sources as using either the
1/4” or 1/8” plug ( but not both )

USING SEVERAL JUNCTION BOXES

Plug the fi rst junction box into your audio source, plug the second
junction box into the expansion connection “ EXT.in” and plug the
third junction box into the expansion connection “ EXT.out”.

Australian Monitor does not recommend connecting more than 3
ATC GLC 8 junction boxes to one audio source, as this may exceed
the capacity of your audio source & cause damage to the audio
source, junction box, headphones or all three.

Expansion connection
Jacks (2)

Mounting Hole (2)

Headphone
Jacks (8 or 10)

DETERMINING YOUR AUDIO SOURCE CAPACITY

All audio sources and headphones have an output loading capacity called
output impedance, specifi ed in term of “ohm-Ω”. The effected impedance
of various of headphones connected is called “ combined impedance”.

To determine the combined impedance of a number of headphones con­nected to the ATC GLC8 you can use the following formula;

Impedance of individual headphone

Combined headphone impedance = ---------------------------------------------------

Number of headphones connected

So for a system using 8 x 200 ohm headphones the formula would look like
this;

200 ohms

Combined headphone impedance = ------------------------ = 25 ohms

8

So the Audio source must have an impedance of 25 ohms or less.

NOTE: this formula only works when the headphones are all
of the same impedance.

1/4” (6.3mm)

1/8” (3.5mm)

Cord Length
Approx. 120cm