7
Linking
7
LINK
In certain situations four outputs may not be adequate, for example at a news conference where each
reporter requires a feed, for this reason we have incorporated a very versatile, but intuitive linking system,
that effectively converts the 4X4 into a pressbox. Linking is via three switches, so there’s no need to open the
unit up to swap jumpers, or worse still, re-solder connections. If a link switch is active the input feeding the
four outputs of that particular channel is disabled, and re-routed to the input of the previous channel. If the
link switch of that channel is also active, then it is re-routed further to the previous channel. In this way any
combination of linking can be available -
Outputs
Each input of the four channels is split (duplicated) into four seperate outputs either electronically or using Transformer
Isolation (a factory fitted optional extra).
Transformer isolation is the best way to get rid of ground loops that cause hum and buzz (by decoupling the ground ), RF
interference (by improving the "balanced" characteristic of the line (called "Common Mode Rejection" or CMR)), or to isolate
mixing consoles so that the levels of one does not effect the other down the cables within the audio system.
An inherant problem with a direct splitter is that overall input impedance is reduced, which in critical high quality applications
can degrade frequency response, particularly on long cables, such as those used in outside recording and broadcast, and
add unwanted interference. The combination of adding gain via the preamplifier and transformer isolation improves this
dramatically, allowing for longer cable lengths and clearer more defined recordings.
8
OUTPUTS
Each channel has four outputs, via standard XLR connectors - pin one is screen, pin two is positive
(hot) and pin three negative (cold).
9
TRANSFORMER
The 4X4 comes with electronic isolation as standard and only has transformer isolation as a
ISOLATION LED
factory fitted optional extra. When fitted each transformer feeds two outputs (either A & B or C & D on
each channel) and its presence is shown by the illumination of the LED that sits inbetween these
two XLR’s. In this way a total of eight transformers can be fitted if all outputs are to be transfomer
isolated.
Headphones
A single 1/4” TRS jack socket with fully adjustable level control has been incorporated to provide
headphone monitoring. To determine which input is monitored see
LISTEN 6
.
Caution should be used when using high output levels and low impedance headphones.
DRAWMER do NOT accept any responsibility for damage caused to operator
hearing or speaker devices by use of excessive output levels.
4x 1
input
/4
outputs
1x 1
in
/ 8
out &
2x 1
in
/4
out
2x 1
input
/ 8
outputs
1x 1
in
/ 8
out &
2x 1
in
/4
out
1x 1
in
/ 12
out &
1x 1
in
/4
out
1x 1
input
/ 16
outputs
