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GTO 24001 

 

1 CHANNEL POWER AMPLIFIER 

 

SERVICE MANUAL

 

 
 

 

 

 
 
 
 
 
 

JBL Consumer Products 

250 Crossways Park Dr. 

Woodbury, New York   11797  

 

 

Rev0  1

2/2008 

Released 2008 
Discontinued XXXX

 

 
 

-  CONTENTS  -   

 

SPECIFICATIONS ………………………………………..1 
PACKING……………………………………………..…....2 

CONTROL/INSTALLATION DRAWINGS……….………4 
BASIC TROUBLESHOOTING……………………………5 

    

 

Output Power:       

 

 

1700W RMS x 1 channels @ 4 ohms; ≤1% THD + N     

 

 

(14.4V supply)  

 

2400W RMS x 1 channels @ 2 ohms; ≤1% THD + N          

Signal-to-noise ratio:       

 

65dBA (reference 1W into 4 ohms)       
97dBA (reference rated power into 4 ohms)  

Frequency response:       

 

20Hz – 330Hz (–3dB)  

THD+N 1KHz LPF=22KHz   

 

≤0.5% (rated power @ 4 ohms)  

Input 

Impedance 

   >20K 

ohms 

Maximum input signal:       

 

6.0V  

Maximum sensitivity:       

 

200mV  

Bass Boost @ 20-100Hz   

 

0-12dB 

DC Offset     

 

 

 

<30mV  

Output regulation:     

 

 

32dB @ 4 ohms  

Idle Current @ 4 ohms      

 

4.2A  

Max Current Draw    

 

 

300A  

Remote Operating Voltages   

 

ON 5V  

Turn-on delay time    

 

 

3 sec  

Circuit Protection    

 

 

Temperature (76C), Short circuit  

Operating voltage range    

 

(8-16V)  

Dimensions:     

 

 

 

24 3/16 x 10 3/8 x 2 1/8”  (630 x 263 x 53mm)  

Fuses:        

 

 

 

(1) x 300A   In-line fuse block 

 

JBL continually strives to update and improve existing products, as well as create new ones. The specifications and 

details in this and related JBL publications are therefore subject to change without notice.                     

 

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GTO24001

GTO24001

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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