4 Channel, 1500W High Performance Car Amplifier

GTR Stadium Amplifiers

Amplifiers with a small footprint and big impact. GTR mono and full-range, multi-channel amplifiers deliver the efficiency and power you expect from Class D amps—and the performance you expect from JBL. Each model in the lineup will accept both high-level or low-level inputs, allowing the JBL Stadium amplifiers to be added to virtually any car audio system, including factory installed systems. The 2-, 4- and 5-channel amplifiers offer Bluetooth® audio streaming, exclusive Clari-Fi™ music restoration technology that analyzes and improves the audio quality of compressed files in real time, a multi-pairing Party Mode that lets anyone in the car stream music, and a cabin-mounted control panel. GTR amplifiers give you the power to shape your car audio experience in new ways.

Item# GTR-104

General Specifications

Peak Power 1500W

Audio Specifications

2-Ohm Power Output 120Wrms x 4, <0.1% THD+N
Signal-to-Noise Ratio >75dB (ref 1 W output @ 4 )
4-Ohm Power Output 100Wrms x 4, <0.1% THD+N
Click here for a complete list of all specs for this product

Spec Sheet (EN)

English 997 KB
  • 1 amplifier
  • 1 cabin-mounted control panel
  • 2 spare fuses
  • Owner’s manual
GTR-104 is rated 4.3 out of 5 by 3.
Rated 5 out of 5 by from Exceptional sound quality from class d amp I am using this amp pass 2 weeks I replace my 5 years old JBL gto1004 amp which has same output but sound quality wise I will take the gto1004. Gtr104 is okay for today's car amp needs. But again I dont like where is jbl going with there new products. They start cutting on quality I personally believe I have many old jbl amps that I compare it to I like old jbl better.
Date published: 2018-07-29
Rated 5 out of 5 by from Good amplifier and great features Pros: This amplifier is very good and has a variety of options. It provides very little distortion and is the perfect mix of having enough wattage while still being reasonable. It aesthetically looks quite nice. It also features many built in features such as Bluetooth and it comes with its own head unit like device that you can attach. This is a very cool idea even though personally I did not take advantage of this feature. Cons: the unit itself is very easy to scratch. This makes it hard to keep clean as it uses glossy plastic. Other than that it is very easy to maintain. It also is very hard to tune the gain on this so that it is loud enough while not causing too much static. This however seems to be a common thing for amplifiers could have and may just be down to my implementation. Overall: I believe that this is a good amp that would fit well in many car audio upgrades. It is very easy to use and has enough features that it should be able to be used for a while without the need to upgrade. It also is high quality and I would not expect it to break any time soon. In general I highly recommend this product even if you have to put up with some very mild inconvenience when setting it up.
Date published: 2018-07-24
Rated 3 out of 5 by from No remote wire plug included Finally installed this. Remote optional. This thing makes my speakers pop constantly from opening the door and that’s all it takes to turn on for some reason. Overall does it’s intended job,
Date published: 2019-04-03
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is there no gain control when operating on bluetooth input only? My gain controls seem to do nothing when streaming from my phone.

Asked by: BOON250
The reason why the gain is disabled when using Bluetooth is because the source device volume is basically the gain.
Answered by: Steven M
Date published: 2018-12-01

What speakers (two 6x9 and two 6.5in) would you recommend to be used with this amp?

Asked by: rando1
I highly recommend the GTO series speakers. I have them installed in my car and they sound way above their output grade compared to other speakers I have installed in the past. My speakers are the same size as yours.
Answered by: ShatteredMJ
Date published: 2019-03-21

I currently have a Club 704 and it can be bridged into 2 channels. I do NOT see that as an option with the GTR 104. Is that just possibly an omission on this website?

Asked by: FiveHundred
The JBL GTR 104 is a 4 channel amplifier and it is possible to do a 2-channel bridged operation. You may connect one speaker&rsquo;s (+) lead to the Front L+ terminal, and the (-) lead to the Front R- terminal. Connect the other speaker&rsquo;s + lead to the Rear L+ terminal, and the - lead to the Rear R- terminal. While for Mono bridge, you have to connect the speaker&rsquo;s positive (+) lead to the L+ terminal, and the negative (-) lead to the R- terminal.
Answered by: Nick F
Date published: 2018-05-18

I'm looking to pair my GX602 and GX963 speakers with an amp and I would like some advice as to which JBL would work best so I only have to buy 1 amp to run both sets of speakers. I was looking at your GTR-104 but my mind isn't made up yet.

Asked by: obviouslyalan
We would like to work with you directly to help with your inquiry. Please submit a case request at https://www.jbl.com/support-contact.html and the Customer Service Team will be more than happy to assist you.
Answered by: Gian at Customer Service
Date published: 2018-03-10

is the GTR-104 CEA2006 complient?

Asked by: frankdanger
Yes, all of our car audio amplifiers are CEA 2006 rated.
Answered by: Steven M
Date published: 2018-01-26

Hi Is it possible to use bluetooth alone to play music out to the speakers, without connecting to the car main unit ? Can a SUB amplifier be connected directly from this if you only play music via bluetooth?

Asked by: Ricardo26
Yes, you can work with this amplifier thru BT even without a direct connection to the car main unit. The amplifier is also has a PRE OUT connection for a secondary amplifier.
Answered by: Mel at Customer Service
Date published: 2018-05-18

Hi. Recently got GTR104 and connected a JBL 3 way power series speakers with a gauge 8 power cable. The HU is a Sony 712BT. Question is Why is the amp auto shutting off when HU is in low volume like 12 below? Need to power it on on the remote again.

Asked by: Poringdrops
Turn the input on the amp down, considerably, and turn up the volume of the head unit, to compensate, and the unit will stay on, and sound better as the signal to noise ratio will be much better.
Answered by: Mark at Customer Service
Date published: 2017-12-02

What Bluetooth codecs does this amp support? &nbsp;Specifically, does it support AAC? &nbsp;AptX?

Asked by: Stuartb
The JBL GTR-104 is a standard SBC A2DP Bluetooth device. It does not support APTX nor AAC.
Answered by: Steven M
Date published: 2018-03-14
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