Warning Messages - RME Audio ADI-2 Pro User Manual

16. Warning Messages

The ADI-2 Pro will show different warning messages and provide guidance in certain cases.
Hi-Power Mode Active
When Hi-Power mode is active with the Volume set higher
than -15 dB and a phone is plugged in, this message reminds
the user to check the current volume setting, and to make
sure the used headphone will stand the high output power
without getting destroyed. The audio signal is held at a low
volume until the gain is set to -15 dB or below. The Volume
knob is active on the current phones output and can be used
to turn down the volume. Once -15 dB is reached the volume
is ramped up to the current gain.
Pressing encoder 1 removes the message immediately, with volume ramped up within 2 sec-
onds to the set value.
The message will also vanish when the phone is unplugged again.
This message is not shown when Volume is set to -15 dB or lower, or when the device is
switched on while the phones are already connected.
Dual Phones Mode required
Phones output PH 1/2 is considered an additional output for
two specific cases: usage of two headphones and balanced
phones operation. Therefore plugging in phones into output
PH 1/2 brings up a warning that this output is coupled to the
rear outputs, and should only be used if required.
PH 1/2 stays deactivated until Dual Phones mode has been
activated via SETUP.
Overload / Short detected
An internal overload can be caused by too high output levels
and too low load impedance. A short circuit in the TRS plug
will also trigger the overload detection. In such a case the
relay will permanently disconnect the phone from the Extreme
Power output stage. If the phones plug is removed and
plugged in again after one second, the unit will activate the
phones output again.
This scheme has been introduced to force the user to check
cabling and connection. For example, a TRS plug not fully
inserted might stay unnoticed but can cause a short circuit.
DC detected
DC detection is crucial to prevent the sensitive phones drivers
from being destroyed by inaudible currents flowing through
them. As the ADI-2 Pro is fully DC coupled from DAC to
phones output, a digital full scale signal with 0 Hz would
produce up to 15 V DC at the outputs, and destroy any
attached phone immediately. In case the power output stage
fails the same could happen. Therefore the phones outputs
will switch off with 1.8 V DC detected.
User's Guide ADI-2 Pro © RME
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