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1. Phantom Power : A switch provides +48V Phantom Power down the XLR cable to microphones that require it. NOTE:
DO NOT ACTIVATE THE +48V SWITCH UNLESS YOU ARE SURE THAT THE MICROPHONE REQUIRES IT.
2. Mic/Line : Switches the level of input 4 between Mic or Line, with LED indication. When in the ‘Line’ position the
phantom power switch is bypassed, the input has a 20dB pad, and the input impedance alters to >10k Ohms.
3. Gain : A twelve position switch adds gain in 6dB steps from 0dB to +66dB, making it incredibly easy to replicate previous
levels.
4. Input : The input is via a standard XLR for both mic and line input - pin one is screen, pin two is positive (hot) and pin
three negative (cold).
5. VU Meter : Each channel has an eight LED VU meter, covering the range from -24dB to +18dB.
6. Listen : Activating this switch will route the input from that particular channel to the headphone section for monitoring.
Each channel can be active separately (solo) or all can be monitored at once if preferred.
7. Linking : 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 the 4X4 can be configured as 1 in/16 out, 2 x 1 in / 8 out, 1 in/12 out and 1 in/4 out as
well as 4 x 4 in/4 out.
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 Isolation LED : The 4X4 comes with electronic isolation as standard and only has transformer isolation
as a 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 in between these two XLR’s. In this way a total of eight
transformers can be fitted if all outputs are to be transformer isolated.
TYPICAL CONNECTION GUIDE:
SPECIFICATION:
Input Impedance mic: 1k Ohms
line: 4.1k Ohms
Max Input Level +21dBu
Output Impedance 50 Ohms
Max Output Level +21dBu
Bandwidth <13.4Hz to 46kHz -1dB
<8Hz to 85kHz -3dB
Mic EIN
Ref 150R, 0dB
Audio Band -128dBu
Distortion THD
Line Input @+4dB 0.005%
Line Noise Ref +4dB
Audio Band -100dBu
Full Band -93dBu
Crosstalk between adjacent channels
better than 87dB @20kHz
Case Size 305mm(w) x 144mm(h) x 270mm(d)
Weight w/o isolating transformers 3.8KG
with isolating transformers 4.3KG
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