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7.2 Analog Outputs
The short circuit protected, low impedance and balanced line outputs are available as (stereo)
1/4" TRS jacks and XLR jacks. Both are internally connected, and can be used simultaneously.
The electronic output stage is built in a servo balanced design which handles monaural and
stereo jacks correctly. When used unbalanced it automatically corrects the gain by 6 dB.
To maintain an optimum level for devices connected to the analog outputs, the ADI-2 includes a
discrete hardware gain stage, directly behind the DA-converter. Electronic switches of the latest
technology, which introduce no additional noise or distortion to the audio path, are used to con-
trol the gain, and offer highest operating comfort. This way, the button OUPUT - LEVEL allows
for a convinient adaptation to the most often used studio levels -10 dBV and +4 dBu.
As with the analog inputs, the analog output levels do not follow any single standard, but are
designed to maintain a problem-free operation with most other devices. The headroom of the
ADI-2 is defined according to the chosen reference level.
Reference
Hi Gain
+4 dBu
-10 dBV
At +4 dBu a headroom of 9 dB offers a problem-free operation with most devices, and meets
the latest EBU recommendations for Broadcast usage. At -10 dBV 12 to 15 dB headroom are
common practice, each mixing desk operating at -10 dBV is able to send and receive much
higher levels. Hi Gain provides maximum level for professional users who prefer to work bal-
anced and at highest levels.
Option Fixed – Adjust
Since hardware revision 1.4* the ADI-2 includes an option to control the output level of the rear
Line outputs via the VOL pot. To activate this option the device has to be opened:
1. Remove the rack ears
2. Remove the six screws that fix the cover
3. Slide the cover to the back
There are two tree-pin contacts in the unit, X 606 and X 607, having jumpers on them. See also
the note printed on the PCB. In factory default the jumpers are placed in position Fixed (middle
and left pin connected). The output level is defined only by the current OUTPUT LEVEL setting
then. In jumper position Adjust (middle and right pin connected) the output level depends on
both the OUTPUT LEVEL setting and the VOL pot position.
The
double
volume
realizes superior monitoring. Set
the OUTPUT LEVEL to +4, then
adjust the monitoring volume with
the VOL pot until it is perfect for
you.
Changing
the
LEVEL to Hi Gain gives a
loudness boost of 6 dB, while
setting it to –10 will reduce
loudness by 9 dB – with the pot
still unchanged!
* The hardware revision 1.4 uses a white
QS LED.
8
0 dBFS @
+19 dBu
+13 dBu
+2 dBV
control
OUTPUT
User's Guide ADI-2 © RME
Headroom
15 dB
9 dB
12 dB
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