The LIMIT indicator lights as soon as the internal dynamic limiter is activated, which is the case
when the amplifier is operated at maximum out- put. Short-term blinking is not a problem, since the
internal limiter controls input levels of up to +20dBu down to a distortion rate of approximately 1%.
However, if this indicator lights permanently, reducing the output level is strongly recommended to
protect the connected loudspeaker systems from being damaged by capacity overload.
The Input Level Meters provide indication of the corresponding audio levels at the amplifier inputs
in dBu. The amplifier’s nominal input level is
+6dBu, the maximum level can be as high as +21dBu. In general, it is recommended that the
amplifier be operated in a range between 0 and
+10dBu. Only signal peaks should be at higher levels.
The level controls are for adjusting the overall amplification of the corresponding amplifier channel.
Setting the level controls to a value between 0dB and -6dB provides full output capacity. The
numerical field below the level controls indicates the set level, by which the output amplification is
attenuated, in dB.
The Output Level Meters provide indication of the corresponding audio levels at the amplifier
outputs. Indication in dB is relative to amplifier full-modulation. A 0dB output level (full-modulation)
is indicated in yellow.
The currently used audio input (ANLG or AES3) is indicated.
The MUTE button is for attenuating the output level of the corresponding amplifier output to -∞.
Clicking the MUTE button with the left mouse button mutes the corresponding amplifier output. The
MUTE button is virtually pressed and lights red.
Clicking the MUTE button once again with the left mouse button disables the mute-function and the
amplifier output is again active. The MUTE button is virtually disengaged and not lit.
AMP MODE indicates the operation mode of the power amplifier blocks. Possible settings are
NORMAL and BRIDGED. Switching the amp mode is only possible locally at the power amplifier,
details can be found in the amplifiers owner's manual.
GAIN/SENSITIVITY displays the amplifiers constant gain of +35 dB.
AMP ROUTING shows how the audio inputs handle the input signals. Possible settings are DUAL
and PARALLEL. Switching the amp routing is only possible locally at the power amplifiers, details
can be found in the amplifiers owner's manual.
Clicking this switch activates the STATUS indicator on the amplifier’s rear panel as well as in the
amplifier’s front panel window in the IRIS-Net software. Normally, the STATUS indicator blinks only
during serial communication. Once the STATUS switch is engaged, the STATUS indicator blinks in a
steady but fast sequence. This function is meant for checking communication and for identifying or
searching an amplifier in a large system setup.
IRIS-Net
REMOTE AMPLIFIER | en 180
Bosch Security Systems B.V.
User Manual
2017.05 | 3.20 | F.01U.119.956
