GTO Amp OM 2/3/04 3:54 PM Page 6
GTO 75.4/75.4II
INSTALLATION AND SETUP
SETTING THESETTING INPUTINSTALLING NEON TUBES
CROSSOVER(S)SENSITIVITY(OPTIONAL)
Determine your system plans and set the1. Initially turn the INPUT LEVEL control(s)1.Using a Phillips screwdriver, remove all
crossover mode switch accordingly. If youto minimum (counter clockwise).screws on the amplifierOs output/power
plan to use the GTO 75.4/75.4II to drive2. Reconnect the (�) negative lead to theend panel and set them aside.
full-range speakers, set the crossovervehicleOs battery. Apply power to the2.Using a 3�32-inch Allen wrench, remove
mode to FLAT and skip to OSetting Inputaudio system and play a dynamic musiconly the screws on the amplifierOs (top)
Sensitivity.�track.clear cover and set them aside.
3. On the source unit, increase the volume3.Remove the end panel and slide the
Initially set the crossover frequency control to 3/4 volume. Slowly increasecover off. Set both parts aside.
control midway. While listening to music,the INPUT LEVEL control(s) toward three4.Locate the enclosed hardware bag and
adjust the crossover for the least oOclock until you hear slight distortion remove the four clips. Each clip has a
perceived distortion from the speakers,in the music. Then reduce the INPUTsquare end and a larger round end.
allowing them to reproduce as much LEVEL slightly until distortion is no Using a round end, press two clips onto
bass as possible. longer heard. each neon tube (e.g., Street Glow AN9
or equivalent), as shown in Figure 13.
Systems using a separate subwoofer setNOTE: After the source unit is on, red LEDs5.For each tube, align both clips so the
the crossover mode to HP (high pass) for(on the top panel) will light, indicating thesquare ends slide onto an exposed
your full-range speakers. Adjust theamplifier is on. If not, check the wiring,extrusion edge, as shown in Figure 9.
crossover frequency to limit bass and especially the remote connection from theDo not cover any screw holes. When
provide increased system volume with source unit. Also refer to OTroubleshooting�AUX OUTPUTinstalled correctly, each neon tube will
less distortion.on the next page.GTO 75.4/75.4II amplifiers aresit under an extrusion and not be visible
equipped with full-range outputs that canwhen viewed from directly above.
For subwoofers, choose the highest be used to connect additional amplifiers. 6.Route each neon tubeOs power cable
frequency that removes vocal informationthrough its respective NEON hole on the
from the sound of the subwoofer.NOTE: When using the high-level inputs,end panel (see Figure 13).
the AUX outputs can be used to pass a7.Slide the cover back into place and re-
If using the GTO 75.4/75.4II to drive a line-level signal to another amplifier.install its screws. Then, replace the end
subwoofer(s), set the crossover mode topanel and reinstall its screws.
LP (low pass).8.Finish the installation of the neon tubes
as instructed in their ownerOs manual.
Figure 12.
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