JBL GTH400-20107 - Manual

3. System Design Using the GTH400 3.1 Speaker Requirements When used in the non-bridged mode agroup-channel of the GTH400 caneasily drive two 2-ohm speaker loads.When only one speaker is connected tothe left and right outputs of a group,virtually any conventional speaker maybe used. When two speaker...

7 3.2 Typical Applications The diagrams on pages 8 & 9 show the most common basic systemconfigurations of the GTH400. One or more of these building blocks may be combined to form elaborate systemdesigns. The GTH400 uses the terminology“Group 1,” “Group 2” and “Group 3” toindicate the three main ...

8 L L R L R+ L– Application 4 3-Channel Bi-Amplified 4-Channel Input (Fading Subwoofer) L L R R GR 1 GR 3 GR 2 Group 1 Group 2 Group 3 Input Mode L L L+R Group 2 Input – GR 2 – Group 3 Input – – GR 3 Speaker Crossover High Pass High Pass Low Pass Preamp Output Crossover – – – 2-Channel Input (Mono S...

9 4. Installation and Use 4.1 Controls and Connectors 1. Preamp-Level Input Connector – Use these connectors for line (pre-amp) level inputs to the amplifier. 2. Preamp-Level Output Connector – Use these outputs to send signal to additional amplifiers. 3. Speaker-Level Input Connector – Use this con...

15 FACE PLATE DASH PANEL SPACERPLATE (INCLUDED) FACE PLATE Cassette/CD Tuner CD Player or Changer CD Input Cassette/CD Preamp Output Antenna Input PowerAntenna Power Antenna Relay Blue w/White Stripe - Remote On/Off Main +12V Power Ground Chassis Ground Vehicle Battery – + Ignition Switch Antenna Mo...

16 is heat- and oil-resistant wheneverrunning wires through the enginecompartment. All wire-to-wireconnections should be soldered andinsulated with heat shrink tubing, orconnected through a high-quality insulated crimp-on connector orsecure set-screw-type terminalblocks. Never leave bare wireexposed...

17 • The GTH400 will draw as much as 60 amps from the vehicle’s electricalsystem, enough to overloadconventional vehicle wiring. Thereforethe +12 volt power supply must betaken directly from the positive side ofthe battery. Do not connect to the vehicle’s fuseblock or to a wire feeding otheraccessor...

18 background noise levels in the systemlow. • To adjust a system using a single GTH400, start with all three of theamplifier gain controls fullycounterclockwise and the ImagingEnhancer Remote set to “Bypass”mode. Some head units haveadditional output level controls orswitches. Set those to their ma...

19 position for driver-optimized soundstage. 5. Proceed to push and pull the Rear-Ambience knob to hear the effectsof “Driver” and “All” modes. Youshould hear imaging coming fromthe middle of the dashboard whenthe knob is pushed in (“Driver”mode). You should hear stereo withambience recovery when th...

21 7. In Case of Difficulty Power-on light does not come on • Head unit not on; turn the head unit on. • Ground wire is disconnected or defective; check for continuity with anohmmeter between the amplifier’sground terminal and a known chassisground point. • Battery wire is disconnected or defective;...

24 9/64" (3.5mm) in 4 places 9/64" (3.5mm) in 2 places 25/64" (10mm) drill in 2 places UP UP Remote Control Drilling Template Power Requirement 11 to 16V DC Negative Ground Fuse Size 30 Amp ATC Type Fuse (2 per Amplifier) Size (L x W x H) 15-1/4" x 11-1/4" x 2" (387mm x 286mm...

25 Staple or clip your original bill of sale here. ▼ GTH400-20107 06/03/98 15:50 Side 25