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GTQ 190 - English
06/03/98 11:49
Quick Start
Recommended for Experienced
Professional Installers Only!
1. Disconnect the negative cable from the
battery. Note: If the vehicle's radio
features a code-type security system,
make certain you know the code before
disconnecting the battery!
2. Run a power cable complete with a
fuse (not included) directly from the
positive +12V battery terminal to the
desired amplifier location. Keep the fuse
within 6" of the battery terminal, and
position it before the wire runs through
any metal partition. A minimum of
#10AWG is required for the GTQ190, as
is a 30A fuse.
Note: All wiring connections should be
made either by soldering with heatshrink
tubing insulation, by using commercially
available high-quality distribution blocks,
or with high-quality crimp-type insulated
connectors installed with a professional-
type, articulated crimping tool. Soldering
crimp-type terminals is recommended
for additional security. Never use wire
nuts, insulation-displacement connectors
(i.e., ScotchLok type), or twist and tape
connections. Do not use electrical tape; it
will loosen with age and extreme
temperatures.
3. Mount amplifier in the desired location
using the included screws.
4. Connect power wiring as shown in the
Wiring Diagram on page 7.
Side 3
System Design Using
the GTQ190
Speaker Requirements
When used in the non-bridged mode, a
group-channel of the GTQ190 can easily
drive two 2-ohm speaker loads. When
only one speaker is connected to the left
5. Connect the outputs from the head unit
and right outputs of a group, virtually any
to the appropriate inputs of the amplifier
conventional speaker may be used. When
according to the Wiring Diagram (page 7)
two speakers are connected in parallel to
with either (or both) high-quality low-
a single output (left or right) of a given
level signal cables with RCA plugs, or the
group, each speaker must have a
supplied speaker-level input connector.
minimum impedance of 4 ohms. This
6. Connect the speakers to the amplifier
ensures that the combined load will not
according to the Wiring Diagram on
drop below 2 ohms. Although the
page 7.
amplifier will not be damaged, load
7. Turn the gain controls to the 1/4-
impedances lower than 2 ohms will
position for all groups.
eventually cause the amplifier to
8. Set the bass boost of each group to the
overheat, activating the protection
desired position.
circuits and causing the unit to shut off
9. Set the crossover switches for each
until it cools down sufficiently.
group as desired.
When a group is in bridged mode, the
10. Set the Group 2 Input as desired.
combined impedance of the speaker (or
11. Set the mode switches to Stereo,
speakers) connected to the bridged
Left + Right, or Left Input Only operation
channels should be at least 4 ohms. As in
for each group.
the example above, sustained operation
12. Double-check your switch settings.
of the unit in bridged mode with less
Reconnect the negative battery cable.
than 4 ohms will likely cause overheating.
Note: Incorrect switch settings can
If monaural operation is desired, and two
damage your speakers!
4-ohm speakers are used, it is best to
13. Turn on the signal source at a low
connect each speaker to an individual
volume level, and check for the correct
amplifier output (left and right) and use
output from each speaker.
the L+R mode on the mode switch to
14. Adjust the amplifier gain controls
provide monaural operation.
using the procedure described in the
The GTQ190 must not be used with
"Adjusting the Gain" section (page 11).
speakers that have either one of their
15. Read the rest of the manual to get
input terminals wired to the frame of
maximum use and enjoyment from your
the speaker or to the chassis of the
amplifier.
vehicle.
(+)
(–)
(+)
(–)
03
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