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JBL GTO1004

600W RMS, 4-Channel Grand Touring Series Amplifier

Discontinued
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This item has been discontinued

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  • Grand Touring Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 100 watts x 4 chan.
    • 2 ohms: 150 watts x 4 chan.
  • LED power and protection indicators
  • Tuned Bass EQ (0-12 dB bass boost)
  • Bridgeable operation
  • Preamp RCA outputs
  • Cast-aluminum heatsink
  • Variable high-pass filter (32-320 Hz, 12 dB/octave)
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 10-100000 Hz
  • Dimensions: 18-9/16"L x 10-3/8"W x 2-1/8"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Also can be found as: GTO-1004, GTO100.4
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

JBL GTO1004 thumbnail
(newest, current model)
JBL GTO75.4II thumbnail
(previous model, replaced by JBL GTO1004)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

150 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

300 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

600 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.05%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

32 - 320 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

32 - 320 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
104 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
25A x 3 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
86%
4 Star
14%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.7
Features
4.8
Design
4.8
Usability
4.9
Luke

Leesburg, OH

Overall
Durability
Value
Features
Design
Usability
Super duper fresh clean power! Lots of it!!

September 12, 2012

I would absolutely recommend the gto1004 to anybody with some good mids and highs that have a higher power rating. This thing looks sliiick and is very easy to hook up. This amp puts out everything your mids and highs could ever ask for and then some, I run all JBL power series that have an rms rating the same as the amp and have to keep the gain way down, well below clipping, just because it's simply too loud. The manual says to turn up the gain until the sound becomes distorted then back it down but I never did it because before I ever got close to distortion I feared for my new speakers lives. The sound quality is unmatched hands down I keep my treble on 0 and it's still incredibly crisp. When you see anything with a JBL logo you can rest assured that you will be overly satisfied.

0 of 0 found this helpful

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akwik6

Pingree Grove

Overall
Durability
Value
Features
Design
Usability
great amp

March 15, 2012

Good sound does not overheat.

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charles

rochester, NY

Overall
Durability
Value
Features
Design
Usability
wow read this.

December 17, 2011

For the money what a great amp. Clean loud powerful and its sooo beautiful and sharp looking. People go nuts on how nice it looks and sounds in my car. JBL is great stuff. Mybe not top top of line but they really make some great car audio. You wont be dissapointed!

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KillaFeeItwter

Da'ville, NC

Overall
Durability
Value
Features
Design
Usability
I respect it

April 18, 2011

Perfect amp to bring the noise when it comes to your highs without the extra bass or distortion in the levels

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Chris

Westminster, CO

Overall
Durability
Value
Features
Design
Usability
Great Value!

February 22, 2011

Works great, does not overheat even when its 100+ degrees outside and no cooler inside the vehicle. Clear crisp sound.

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brandon

Homer, MI

Overall
Durability
Value
Features
Design
Usability
JBL

January 6, 2011

Jbl hands down when it comes to my highs. This amp puts out a ton of power and sounds great. Works well keeping up with my orion lows.

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MIKE

MASSACHUSSETTS

Overall
Durability
Value
Features
Design
Usability
JBL GTO1004

October 20, 2010

Definetely the best buy i could ever made, power full reliabable easy to use and install .Great produt .

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fernando

Brazil

Overall
Durability
Value
Features
Design
Usability
JBL GTO1004

September 29, 2010

This is a huge amp. Over a foot long so be aware if space is an issue for you. If it's not then get this amp. For the money it won't be beat. JBL makes very high end audio equipment and this amp is nothing short of high end. It makes my Type R components and rear coaxial scream with authority. If you want a powerhouse quality 4 channel speaker amp for a reasonable price buy this one.

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keith

Canada

Overall
Durability
Value
Features
Design
Usability
good but could be better

July 21, 2010

Honestly this amp is wicked. it pushes out way more than you might expect. However the way that JBL built the RCA inputs is incredibly cheap. They're not even soldered on. If you pull on them they pop right out. not cool. I figured this out when I unplugged a pair of monster RCA cables.

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Metal Dave

Boca Raton, FL

Overall
Durability
Value
Features
Design
Usability
Awesome!

July 16, 2010

IT not only looks good but def delivers!! This is my first AMP I ever used for my internal 4 speakers and when my buddy told me how big of a difference it would make compared to running the speakers off the headunit, I could not believe it! Good STUFF!!! Only thing about it is that it was just a HAIR too long for where I was mounting it but I was able to improvise.

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Allister

Canada

Overall
Durability
Value
Features
Design
Usability
Very Pleased

July 12, 2010

Very clean and stable, runs cool even at higher volumes letting me enjoy the power chords ripping through a Marshall stack, or the nuance of the breath noise in a Japanese flute. It all comes through as it should. Running the Power Series speakers in the cabin with the 1004 is a perfect match. The install was very easy with my well thought out install plan.

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Khushpreet

India

Overall
Durability
Value
Features
Design
Usability
Awesome!!!

May 19, 2010

This is a great product. A very high quality product and great bang for your buck. Highly Recommended!!!

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Shaun

Springvale, ME

Overall
Durability
Value
Features
Design
Usability
WOW!!! Sound quality and power!!!

February 16, 2010

This is a huge amp. Over a foot long so be aware if space is an issue for you. If it's not then get this amp. For the money it won't be beat. JBL makes very high end audio equipment and this amp is nothing short of high end. It makes my Type R components and rear coaxials scream with authority. If you want a powerhouse quality 4 channel speaker amp for a reasonable price buy this one.

0 of 0 found this helpful

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CommercialRig

Boston, Ma.

Overall
Durability
Value
Features
Design
Usability
Awesome!!

September 16, 2009

This was my first audio build and the JBL GTO1004 was a breeze to wire. Puts out plenty of power for a typical sound system and it keeps it's cool. A bit long but I made it fit. My audio build using this amp, all purchased from Sonic Electronix.... These guys are very trustworthy.... http://www.ford-trucks.com/forums/883808-2003-f-250-super-duty-super-cab-audio-build.html

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Accessory Tools and Products

Accessories added

NVX XKIT44 4-Gauge 4-Channel Wiring Kit

4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $99.99

T-Spec V8-4DAK 4-Channel 4-Gauge Wiring Kit

Get everything you need to hook up your new amplifier!

Your Price $89.95

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $59.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $151.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $23.99

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $34.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $99.95

Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

Your Price $19.95

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $29.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

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Product Summary

Manufacturer

Model Number

GTO1004

UPC

050036119184

Weight

15.00lbs

Internal SKU

gto1004

Internal Product ID

12244

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JBL GTO1004

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