Selecting The Operating Mode; Switching The Amplifier On / Off; Adjusting The Volume Muting The Channel - Monacor STA-450D Manual De Instrucciones

6 Operation

6.1 Selecting the operating mode

Select the desired operating mode for each
channel pair with the switches OPERATING
MODE (7):
NORMAL = normal mode, each channel of
a channel pair operates separately, i . e .
each channel receives an input signal of
its own which is available with an RMS
power of 50 W (at 4 Ω) at the correspond­
ing output .
BRIDGE = bridge mode, the channels of
a channel pair are bridged for power
doubling . 100 W (at 8 Ω) are available at
the corresponding output terminals . Only
feed the input signal to the corresponding
odd­numbered jack .

6.2 Switching the amplifier on / off

To prevent loud switching noise, always switch
on the power amplifier in an amplifier system
after all other units have been switched on
and switch it off first after operation . Prior to
the first switch­on, set the controls LEVEL (3)
to the left stop .
Switch on the amplifier with the POWER
switch (4) . The switch will light up as a power
indication .
6.3 Adjusting the volume
muting the channel
1) Adjust the outputs of the signal sources
(e . g . mixer, preamplifier) to the rated level
(0 dB) or the maximum undistorted output
signal .
2) Turn up the controls LEVEL (3) of the chan­
nels used until the maximum desired vol­
ume is reached . Turn the controls of the
channels not used to zero .
For channel pairs operating in bridge
mode, only adjust the volume with the
corresponding left control (CHANNEL 1,
3, 5 or 7) . Set the other control to zero; it
does not have any function .
CAUTION Never adjust the amplifier
to a very high volume . Per­
manent high volumes may
damage your hearing! The
human ear will get accus­
tomed to high volumes
7 Specifications
Model
RMS output power
normal mode at 4 Ω
normal mode at 8 Ω
bridge mode at 8 Ω
Maximum total power
Input sensitivity for rated power
XLR jacks
RCA jacks
Input impedance
Frequency range
Crosstalk
Output circuit
Ambient temperature
Power supply
Max . power consumption
Dimension (W × H × D)
Weight
Subject to technical modification .
All rights reserved by MONACOR
may be reproduced in any form or by any means for any commercial use.
If one of the red indicators CLIP (2) shortly
lights up, the maximum possible volume
will be reached . If it shortly lights up more
frequently, the channel is overloaded . In
this case slightly turn back the correspond­
ing control .
3) Each channel may be muted separately,
e . g . if the background music interferes
with an announcement . For this purpose,
press the corresponding button MUTE (1) .
For channel pairs operating in bridge
mode, it is only necessary to press the cor­
responding left button MUTE (CHANNEL
1, 3, 5 or 7) . The other button does not
have any function .
STA-450D
4 × 50 W
4 × 30 W
2 × 100 W
300 W
230 V/ 50 Hz
300 VA
7 .2 kg
® INTERNATIONAL GmbH & Co. KG. No part of this instruction manual
which do not seem to be
that high after some time .
Therefore, do not further in­
crease a high volume after
getting used to it .
STA-850D
8 × 50 W
8 × 30 W
4 × 100 W
600 W
550 mV
1 V
20 kΩ
10 – 20 000 Hz
> 45 dB
class D
0 – 40 °C
230 V/ 50 Hz
600 VA
482 × 89 × 330 mm
2 RS (rack spaces)
10 .5 kg
7