GTO 24001 - JBL Car Audio Service Manual (repair manual). Page 4

Installation Warnings and Tips
• Disconnect the negative (–) lead from your vehicle’s

battery.

• At the installation sites, locate and make a note of

all fuel lines, hydraulic brake lines, vacuum lines
and electrical wiring. Use extreme caution when
cutting or drilling in and around these areas.

• Choose a safe mounting location away from moisture. 
• Make sure there is sufficient air circulation at the

mounting location for the amplifier to cool itself.

• Mount the amplifier, using the supplied hardware.

Specifications
• 1700W RMS x 1 channel @ 4 ohms and 

≤1% THD + N*

• 2400W RMS x 1 channel @ 2 ohms, 14.4V supply and

<1% THD + N*

• Frequency response: 20Hz – 330Hz (–3dB)
• Maximum input signal: 6V*
• Maximum sensitivity: 200mV*
• THD + N: 0.5%
• Signal-to-noise ratio: 65dBA 

(reference 1W into 4 ohms)*

• Signal-to-noise ratio: 97dBA 

(reference rated power into 4 ohms)

* CEA-2006A-compliant

0 Speaker Output Connectors

• Connect the speakers to these terminals, 

observing proper polarity. Either + or – 
terminal may be used. Minimum total 
impedance is 2 ohms.

1 Fuse Holder/+12V Connection

• Replace fuse only with the same type and rating.
• Mount the fuse holder within 18" of the vehicle’s

battery, inside the engine compartment and 
connect one end of the fuse holder to the 
battery’s “+” terminal using a single piece of 
0 gauge wire as shown in diagrams 2a and 2b. 

• For normal installation, connect two pieces of 

4 gauge wire to the other end of the fuse holder
as in diagram 2a. Route both pieces of 4 gauge
wire through the car, using rubber grommets in
all locations where the wire must pass through
metal. Connect the other end of the 4 gauge
wire to the two “+” terminals on the amplifier’s
power connectors 2 (on the previous illustra-
tions page).  

• For competition installations, replace the fuse

with a 300A ANL (not included). Connect a single
piece of 0 gauge wire to the other end of the
fuse holder as in diagram 2b. Route the 0 gauge
wire through the car, using rubber grommets in
all locations where the wire must pass through
metal. Connect the other end of the 0 gauge
wire to the input terminal of a power distribution
block (not included) designed to accept 0 gauge
wire. Connect two pieces of 4 gauge wire to 
the distribution block and connect the other
ends of the wire to the two “+” terminals on 
the amplifier’s power connectors 2 (on the 
previous illustrations page).

2 Power Input Connectors 

• +12V: See ”fuseholder“ 1.
• GND: Connect to the vehicle’s chassis using 4

gauge wire. Refer to the picture below. 

• REM: Connect to the “Remote Out” lead from

the source unit or to a source of switched 
12V+ (ACC).

3 Aux Output Connectors (RCA)

• Nonfiltered pass-through output. Connect to the

input of an additional amplifier. 

4 Input Connectors (RCA)

• Connect to the RCA outputs from the source unit

or signal processor.

5 Input-Level Control

• Used to match the input level of the amplifier 

to the output level of the source unit. 

• See B for the adjustment procedure.

6 Low-Pass Filter Frequency Control

• 12dB/octave low-pass filter, 

variable from 32Hz to 320Hz.

• See C for the adjustment procedure.

7 DBO (Dynamic Bass Optimization) Variable

• For woofers in tuned (vented) enclosures, set

the Frequency control to a value 10Hz below the
enclosure’s resonance (tuned) frequency.

• For woofers in sealed boxes, set the control to

any value you prefer, between 30Hz and 50Hz.

• Set the Boost control according to your 

preference, being careful not to apply 
enough boost to damage your woofer(s).

A DBO High-Pass Filter Frequency control,

variable between 10Hz and 100Hz. See
above for appropriate settings. 

B DBO Boost control provides up to 

12dB of boost, slightly above the high-
pass filter’s frequency. See above for 
appropriate settings.

8 Remote Level Control (RLC) Connector 

• Connect the Remote Level Control (RLC) here,

using the supplied RJ-11 cable. 

9 Power On LED

• Illuminated when the amplifier is on.

A Protect LED

• Illuminated under any of the following fault 

conditions: battery over/under voltage, short 
circuit in speaker wires, amplifier is too hot,
amplifier’s output circuit has failed (DC voltage
is present in the amplifier’s output).

B Setting Input Level

A Turn Input Level control counterclockwise to

6V (minimim).

B With a dynamic music track playing, turn the

head unit’s volume control to the 3/4 position.

C Turn Input Level control clockwise until the

bass output is proportionate to the output of
the high-frequency speakers, according to
your preference.

D Input level is now adjusted correctly.

C Setting the Crossover

A Crossover setting for subwoofers.
Note: Acceptable frequency ranges are indicated 
in gray.

D Remote Level Control

The Remote Level Control, if installed, will allow
you to adjust the level of bass while seated in the
listening position.

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GTO24001