GTA 475
7
Use loudspeakers with an impedance of
2 to 4 (see table or installation drawing). Ob-
serve the max. power handling specifications
(music output). Do not connect the loudspea-
kers to ground; only use the terminals provided.
The cross-section of the positive and negative
cable must be at least 6 mm
2
.
GTA 475 amplifier
The amplifier is suitable for connection to car
radios with Cinch connector. Use the Blaupunkt
ISO Cinch adapter to connect the amplifier to
car radios with ISO connector (7 607 893 093 /
7 607 855 094).
Applications and loudspeaker
connection
Quadro mode
Max. power 4 x 160 watts / 4 .Fig. 4
Stereo mode
Max. power 2 x 425 watts / 4 .Fig. 5
Quadro mode
Max. power 4 x 210 watts / 2 .Fig. 4
Quadro mode
RMS power 4 x 75 watts / 4 ....Fig. 4
Stereo mode
RMS power 2 x 210 watts / 4 .Fig. 5
Quadro mode
RMS power 4 x 105 watts / 2 ..Fig. 4
RMS power in accordance with DIN 45500
(1% dist. / +14.4V)
Frequency response 10 Hz - 35,000 Hz
Signal-to-noise ratio > 95 dB
Distortion factor (RMS)< 0.03 %
Stability 2 (4 in bridged mode)
Input sensitivity 0.3 - 8 V
Direct Aux IN 0.3 V
Low pass filter
(Low Pass) 50 - 250 Hz
High pass filter
(High Pass) 50 - 250 Hz
Bass boost 0 to +12 dB
Inputs 4x RCA, gold-plated
4x HighLevel speakers
2x Direct Aux Inputs,
3.5 mm stereo
Outputs 4x Loudspeakers,
gold-plated
Dimensions
W x H x D (mm) 352.5 x 53 x 268.5
Positive/negative connection
We recommend a cable cross-section of not
less than 6 mm
2
. Run a standard commercial
positive cable to the battery and connect to the
fuse holder. Use cable grommets when passing
cables through holes with sharp edges. Bolt a
standard commercial negative cable to a ground
point free of induced noise (car body bolt, body
panel) - not to the negative battery pole. Clean
the contact surface of the ground point down
to bare metal and coat with antiseize graphite
petroleum.
Integral fuses
The integral fuses within the amplifier protect
the final stage and the entire electrical system
in the event of a fault. Never bridge fuses or re-
place fuses with a higher current rating.
Example connections
Power supply connection ..........................fig. 2.
Connection of car radio with cinch
output .........................................................fig. 3.
Loudspeaker connections ..........................fig. 4/5
Direct Aux Input Connection ......................fig. 6/6a
High- Input ..................................................fig. 7
Connect remote amplifier connection
to switchable +12 V power source.
This enables the amplifier to be switched on
and off with the radio’s On/Off switch.
High-level inputs
The amplifier is equipped with high-level inputs
to permit connection to radios without preamp
outputs (Fig. 7). This enables direct connection
to be made to the radio’s loudspeaker output.
Direct Aux Input Connections
Connection options if the car radio has no
AUX input or if the AUX input is already
connected
You can directly connect various AF sources
(such as an MP3 player and/or mobile naviga-
