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Blaupunkt EMA 455 Manual

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EMA 455
49
Bridged loudspeaker connections
The EMA ampli er can also be bridged for a mono con gura-
tion. This allows the ampli er to be used for one or several
subwoofers or mid-range drivers. In this con guration, the
ampli er combines the right and left channel to a single-
channel output (mono output).
Note:
The ampli er can add the right and left signal information
only if the right as well as the left RCA connection were
carried out.
Caution:
In a bridge circuit, the ampli er load must be 4 ohm or
higher. A lower load leads to an overheating or switch-o
of the ampli er and can cause permanent damages.
Adjusting the type and range of the
frequency crossovers
With the EMA 455, the type of frequency crossover (i.e. "Low
Pass" or "Hi-Pass") and the desired entry frequency can be
adjusted. For example, if a pair of subwoofers is to be con-
nected, the low-pass settings shown are required (Fig. 3). The
entry frequency is dependent upon the frequency range of
the loudspeakers (see recommended frequency range of
the loudspeakers).
High-Pass
At a setting of 80 Hz, the ampli er has a frequency range of
80 Hz to 30,000 Hz.
Low-pass frequency control
This control is active if the switch is in the position "Low-Pass",
and allows for setting the desired entry frequency.
Example:
At a setting of 150 Hz, the ampli er has a frequency range
of 10 Hz to 150 Hz.
Bass boost
The bass boost control is used to adjust the bass response
of the ampli er.
The setting options are: 0 dB / +6 dB / +12 dB.
Power-on indicator (PWR / PRO)
Green LED:
Output stage on, regular operating status.
Red LED:
Output stage is electronically switched o due to an error.
Recycling and disposal
Please use the return and collection systems avail-
able to dispose of the product.
Subject to changes
EMA_455_22LG.indd 49EMA_455_22LG.indd 49 20.02.2013 10:56:43 Uhr20.02.2013 10:56:43 Uhr
… 49 …


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