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Features
Controls
Connections
Features
Multi-Channel Design: The JBL GTO-5EZ is a 5-channel amplifier,
basically a 4-channel Class AB amplifier and a Class D mono subwoofer amplifier built
into one chassis. Either half of the 4-channel section can be bridged, so the amp can
be used as a 5-channel, 4-channel, or 3-channel amplifier.
CEA 2006 Compliant: The power ratings are measured according
to the Consumer Electronics Association CEA-2006 standards. These standards
allow you to accurately compare the rated power output of all CEA 2006-compliant
amplifiers, even different brands. Manufacturers who adhere to the standards can
display the CEA 2006 logo on their products and packaging. The power output is
measured from 20 Hz to 20 kHz for the front and rear channels and 20 Hz to 280 Hz
for the subwoofer channel, using a 14.4 volt power supply, and with no more than
1% THD+N:
- Front and Rear Channels:
- 50 watts x 4-channels into 4-ohms
- 75 watts x 4-channels into 2-ohms
- 150 watts x 2-channel into 4-ohms (Bridged)
- Subwoofer Channel:
- 350 watts x 1-channel into 4-ohms
- 500 watts x 1-channel into 2-ohms
Setup Disc: The included setup CD is used to optimize the
input gain. A test tone is output from the disc and the Gain LEDs on the amp
(green, yellow, red) guide you through adjusting the gain controls.
Note: The instructions in the first
version of the manual indicate the radio should be at full
volume when playing the setup disc; this is wrong
and JBL is in the process of correcting the manual. The volume
should actually be as high as possible without distorting the
signal; this will be different for every radio, but approximately
3/4 volume is typical.
Auto Turn-on: The GTO-5EZ has a signal sensing automatic
turn-on circuit; it will turn on whenever an audio signal is present at any of
the RCA inputs. The amplifier will automatically turn off approximately five
minutes after the input signal ceases. If you prefer to use the radio's remote
lead, the auto turn-on feature can be turned off.
Crossovers: There are three independent, built-in crossovers.
The subwoofer channel has a low-pass crossover that cannot be bypassed. The crossover
point is continuously variable from 40 Hz to 280 Hz and the crossover's slope is
12 dB/octave. The front and rear channels' crossovers can be set to high-pass,
low-pass, or they can be bypassed (run full range). The crossover points are
continuously variable from 40 Hz to 220 Hz and adjusted independently. The
crossover's slope is 12 dB/octave.
Audio Input: If your radio has no line-level outputs, use
the included adapters to convert the speaker wires to RCA and plug them into the
amplifier's inputs. There are two input level switches (one for the front and
rear channels and one for the subwoofer channel), each with a Hi2 position, used
to present a speaker load to factory radios equipped with a circuit that turns
the radio off when an amp is connected.
Front/Rear Routing Switch: The signal for the front and rear
amplifier channels can be supplied from the separate front and rear inputs (two
pair of stereo RCAs), or from just the front channel inputs (stereo RCAs). Set
the switch to F&R (front and rear) or F (front).
Sub Routing Switch: The signal for the subwoofer amplifier
channel can be supplied from the dedicated subwoofer input (single RCA), or from
the front and rear channel inputs (stereo RCAs). Set the switch to F&R (front
and rear) or S (sub).
Controls
Top:
- Subwoofer channel:
- Crossover Frequency: rotary knob;
continuously variable from 40 Hz to 280 Hz
- Input Gain: rotary knob (the gain
LEDs are above the knob)
- Bass Boost: rotary knob; continuously
variable from 0 to +12 dB; boost centered at 45 Hz
- Front channels:
- Crossover selector: three position
switch; high-pass, full range, low-pass
- Crossover Frequency: rotary knob;
continuously variable from 40 Hz to 220 Hz
- Input Gain: rotary knob (the gain
LEDs are above the knob)
- Rear channels:
- Crossover selector: three position switch;
high-pass, full range, low-pass
- Crossover Frequency: rotary knob; continuously
variable from 40 Hz to 220 Hz
- Input Gain: rotary knob (the gain LEDs are above
the knob)
Right Side:
- Front/Rear Input Level: three position switch; Low,
Hi1, or Hi2 (used only with factory radios having a circuit that turns the
radio off when it sees no speaker load)
- Sub Input Level: three position switch; Low, Hi1, or
Hi2 (used only with factory radios having a circuit that turns the radio off
when it sees no speaker load)
- Sub Routing Switch: F&R (front and rear)/S (sub)
- Front/Rear Routing Switch: F (front)/F&R (front and
rear)
- Gain LEDs: on/off
Bottom:
Connections
Left Side:
- Power and Ground Terminals: set screw
terminals; accept up to 4 gauge bare wire
- Note: JBL recommends the
power and ground cables be 6 gauge minimum. The
recommended accessory list for the GTO-5EZ
includes wiring kits with 4 gauge wire.
- Remote Turn-on Terminal: set screw
terminal; accepts up to 8 gauge bare wire
- Speaker terminal: five pair of set
screw terminals (for front left, front right, rear left,
rear right, and sub); accept up to 8 gauge bare wire
- Fuses: three ports for 30-amp ATO
fuses (fuses are factory installed)
Right Side:
- Audio Input: five female RCA jacks
(front left, front right, rear left, rear right, and sub);
compatible with speaker level signals using the included
adapters
- Remote: RJ-25 jack (the wired remote
is not yet available as of 2/21/12)
