GTQ 360 new 7/17/98 10:44 AM Page 5
4.3 Remote-In/Out Connection
Y The remote power control system turns
the GTQ ampliŢer off when not in use to
4. Wiringprevent discharging of the vehicleOs bat-
tery. Because the JBL GTQ ampliŢers
4.1 Wiringinclude Common Sense 2-way turn-on,
Proper wiring of the GTQ ampliŢers andwhen using the speaker-level inputs with
the associated components is extremelya head unit that includes a BTL power
3.2 Signal Sourcesimportant for proper performance andamp it is not necessary to connect the
The low-level preamp outputs of anylong-term reliability. Using the properremote wire. The ampliŢer will automati-
radio/tape deck, CD player, or preamp/type of wire is very important.cally activate whenever you turn on the
equalizer so equipped can drive theRoute the wiring through the car carefully.head unit. If you are using the line-level
GTQ360 or GTQ240. The gain controls ofDo not allow wires to lay against sharpinputs, or the speaker-level inputs with a
the ampliŢer are used to match its inputsheet metal edges or any other surfaceshead unit that does not have a BTL power
sensitivity to the output voltage of thethat might wear away or cut through theamp, use the following remote wire con-
Parallel Wiring
source. This matching is important toinsulation of the wire. Use insulated strainnections.
keep noise low and is explained in thereliefs, rubber grommets and plastic tub-Y Using the REM-IN feature � When +12
(+)OAdjusting the Gain� section of this ing to protect the wires whenever they arevolts is applied to the remote IN/OUT ter-
manual.run through sheet metal panels or areminal the ampliŢer is turned on. A red
Thanks to Universal Interface Circuitry,placed where they might be pulled orLED on the top panel of the ampliŢer will
the GTQ360 or GTQ240 can also be con-damaged.illuminate to indicate the ampliŢer is on.
2 ohms
Nominal4 ohms4 ohmsnected to power ampliŢers, radios orIf the head unit has a +12 volt automatic
equalizers that are equipped with only4.2 Ground Wireantenna or ampliŢer remote activation
Impedance
speaker outputs by connecting themY Proper grounding is extremely impor-wire, connect it to the REM-IN/OUT con-
through the speaker-level input connec-tant. Use a heat- and oil-resistant strandednector on the GTQ ampliŢer. When the
tor. Inside the GTQ360 and GTQ240, thecopper automotive wire equivalent to theampliŢer is turned on, there is a time
(�)speaker-level and preamp-level inputs aresize used for the +12V connection. Crimpdelay of several seconds (longer in cold
connected through a mixing circuit, whichor solder and insulate any wire-to-wireweather) before the ampliŢer will produce
allows them to be used simultaneously.connections. Keep the ground wire assound. This eliminates the chance of
Therefore a low-level source, such as ashort as possible. A ground wire must beannoying noises produced by the radio or
Series WiringCD player equipped with a volume con-solidly connected to a major sheet-metalsignal processors being ampliŢed and
trol, may be connected to the preamp-structure of the vehicle such as a panelpassed to the speakers when the system
(+)level inputs at the same time as a pow-near the amp-mounting location. Scrapeis Ţrst activated.
4 ohms
ered radio/tape unit is connected to theall paint and primer off the sheet metal atY Some head units have no automatic
speaker-level inputs. This provides a high-the grounding point to ensure a goodantenna or power amp activation wire.
8 ohmser performance alternative to an FM mod-electrical connection. Attach the wire toOthers have automatic antenna wires that
Nominalulator connection when you wish to addthe grounding point with a nut, bolt andare Oon� only when the radio is used but
ImpedanceCD capability to a factory cassette stereo.star washer. The high current demandednot when a tape is played. In such cases,
Switching from one source to the other isby high-powered ampliŢers requires aconnect the remote-in turn-on terminal to
4 ohmsas simple as turning the desired sourcemore secure ground than the typicalan unused accessory terminal in the fuse
(�)on and turning the undesired one off Nsheet-metal screw will provide. Coat theblock, or any other +12 volt source that is
no additional switches or relay connec-connection with silicon sealant for betterturned on and off with the vehicleOs igni-
tions are needed.long-term reliability.tion switch. The remote on/off system
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ACEC
