Read JBL GTQ 190 (serv.man2) User Guide / Operation Manual online
02
Introduction
Thanks
for purchasing your new GT
series automotive multi-channel ampli-
fier. Your GT series amplifier will easily
connect to virtually any car audio
system, whether it is factory installed or
purchased separately. The GTQ190
includes an abundance of unique
features which are described in this
manual. The flexible design of its built-in
crossover circuitry allows elaborate
systems to be built more simply than
with conventional components. For
optimum performance, the power
amplifier circuitry is a fully-discrete
design notable for its low distortion and
unusually clean and clear sound quality.
In addition to conventional preamp-level
inputs, the GTQ190 features JBL’s
Universal Interface, which facilitates
simple connection to factory radios with
the low distortion that is usually only
associated with preamp-level
connection. With the Universal Interface,
fier. Your GT series amplifier will easily
connect to virtually any car audio
system, whether it is factory installed or
purchased separately. The GTQ190
includes an abundance of unique
features which are described in this
manual. The flexible design of its built-in
crossover circuitry allows elaborate
systems to be built more simply than
with conventional components. For
optimum performance, the power
amplifier circuitry is a fully-discrete
design notable for its low distortion and
unusually clean and clear sound quality.
In addition to conventional preamp-level
inputs, the GTQ190 features JBL’s
Universal Interface, which facilitates
simple connection to factory radios with
the low distortion that is usually only
associated with preamp-level
connection. With the Universal Interface,
a factory radio can either be used as the
main music source or simultaneously
combined with a CD player or changer
that has volume-control capability. By
providing this two-unit direct connection,
Universal Interface circuitry eliminates
the need for an FM modulator to
interface a CD player to factory radios,
improving the fidelity of digital playback.
In addition, when using a high-powered
(BTL) radio through the speaker-level
inputs, Common Sense turn-on circuitry
senses the common-mode voltage pres-
ent on the radio’s speaker wires, turning
the amplifier on without an additional
remote wire.
Also, the built-in active crossover
provides either full-range, high-pass or
low-pass operation. This lets your GT
series amplifier power either subwoofer
or component speakers in a bi-amplified
system, or conventional full-range
speakers in simpler systems.
The GTQ190 also includes preamp-level
outputs which provide a full-range signal
to drive additional amplifiers. This lets
you build systems of virtually any design
without requiring a separate electronic
crossover.
main music source or simultaneously
combined with a CD player or changer
that has volume-control capability. By
providing this two-unit direct connection,
Universal Interface circuitry eliminates
the need for an FM modulator to
interface a CD player to factory radios,
improving the fidelity of digital playback.
In addition, when using a high-powered
(BTL) radio through the speaker-level
inputs, Common Sense turn-on circuitry
senses the common-mode voltage pres-
ent on the radio’s speaker wires, turning
the amplifier on without an additional
remote wire.
Also, the built-in active crossover
provides either full-range, high-pass or
low-pass operation. This lets your GT
series amplifier power either subwoofer
or component speakers in a bi-amplified
system, or conventional full-range
speakers in simpler systems.
The GTQ190 also includes preamp-level
outputs which provide a full-range signal
to drive additional amplifiers. This lets
you build systems of virtually any design
without requiring a separate electronic
crossover.
Features
• 4-, 3-, or 2-Channel Operation
• Simultaneous Stereo + Mono
Operation
• 2 Built-In Independent 18dB/Octave
Frequency Selectable High-Pass and
Low-Pass Crossovers
• 2 Pairs of Preamp Outputs
• No Current Limiting
• Oversized Floating Rail MOSFET
Switch-Mode Power Supply
• “Common Sense” 2-Way Turn-On with
Remote-Out Capability to Turn On Other
Amplifiers or Signal Processors
• Switchable Bass Boost
• “Stealth Remote” Silent Turn-On
Circuitry with Power-On Indicator
• Balanced Speaker-Level Inputs
• Mute Input – Accepts Standard Noise
Gate Input to Silence the Amp During No
Music Conditions
• 2 Continuously Adjustable Gain
Controls
• Capable of Single-Ended Operation into
2-Ohm Loads
• Fully Complementary, Direct-Coupled,
Discrete Power Amplifier Circuitry
• Gold-Plated RCA Input Connectors
• Gold-Plated Power and Speaker
Connectors
• Third Order (18dB per Octave)
Capacitive/Inductive Power-Supply
Filtering
• Independent Input Mode Switching for
Each Group of Channels
• Made in USA
• Simultaneous Stereo + Mono
Operation
• 2 Built-In Independent 18dB/Octave
Frequency Selectable High-Pass and
Low-Pass Crossovers
• 2 Pairs of Preamp Outputs
• No Current Limiting
• Oversized Floating Rail MOSFET
Switch-Mode Power Supply
• “Common Sense” 2-Way Turn-On with
Remote-Out Capability to Turn On Other
Amplifiers or Signal Processors
• Switchable Bass Boost
• “Stealth Remote” Silent Turn-On
Circuitry with Power-On Indicator
• Balanced Speaker-Level Inputs
• Mute Input – Accepts Standard Noise
Gate Input to Silence the Amp During No
Music Conditions
• 2 Continuously Adjustable Gain
Controls
• Capable of Single-Ended Operation into
2-Ohm Loads
• Fully Complementary, Direct-Coupled,
Discrete Power Amplifier Circuitry
• Gold-Plated RCA Input Connectors
• Gold-Plated Power and Speaker
Connectors
• Third Order (18dB per Octave)
Capacitive/Inductive Power-Supply
Filtering
• Independent Input Mode Switching for
Each Group of Channels
• Made in USA
About Installation
Although the GTQ190 is designed to
make installation as easy as possible, this
is an extremely sophisticated product
that requires proper installation and
setup to realize its full performance
potential. Skill with tools, an
understanding of basic electronics, and
experience with car stereo installation are
needed to properly install this amplifier. If
you feel you do not have the necessary
knowledge and skills, we strongly
recommend that the installation be done
by your authorized JBL dealer. If the GTQ
amplifier is installed by an authorized JBL
dealer in the USA, we will double the
length of your warranty to two years
from date of purchase. Please retain a
copy of your bill of sale to ensure this
additional coverage.
If you choose to install the GTQ amplifier
yourself, read all of the information in
this manual before you start the
installation. Pay particular attention to the
safety precautions and notes.
It will save potential problems later if you
take a few minutes to plan the complete
installation before you start. The routing
of wires, the power supply connection
points, and the mechanical installation of
the unit should be completely thought
out before you begin. Work carefully and
check each step as it is performed. Before
operating the amplifier, recheck the entire
installation to be sure that each
connection is correct, properly insulated
and secure.
make installation as easy as possible, this
is an extremely sophisticated product
that requires proper installation and
setup to realize its full performance
potential. Skill with tools, an
understanding of basic electronics, and
experience with car stereo installation are
needed to properly install this amplifier. If
you feel you do not have the necessary
knowledge and skills, we strongly
recommend that the installation be done
by your authorized JBL dealer. If the GTQ
amplifier is installed by an authorized JBL
dealer in the USA, we will double the
length of your warranty to two years
from date of purchase. Please retain a
copy of your bill of sale to ensure this
additional coverage.
If you choose to install the GTQ amplifier
yourself, read all of the information in
this manual before you start the
installation. Pay particular attention to the
safety precautions and notes.
It will save potential problems later if you
take a few minutes to plan the complete
installation before you start. The routing
of wires, the power supply connection
points, and the mechanical installation of
the unit should be completely thought
out before you begin. Work carefully and
check each step as it is performed. Before
operating the amplifier, recheck the entire
installation to be sure that each
connection is correct, properly insulated
and secure.
GTQ 190 - English 06/03/98 11:49 Side 2
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