High-performance Clari-Fi™ Enhanced 4-channel full-range car audio power amplifier

£379.99379.99 each
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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)

2 MB
  • 1 amplifier
  • 1 cabin-mounted control panel
  • 2 spare fuses
  • Owner’s manual

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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: 2017-06-12

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

Asked by: rando1
The GT7-6 (6-1/2&rdquo;) and the GT7-96 (6&rdquo;x9&rdquo;) can handle 50W and 70W of amplifier power at 4-ohms respectively. The GTR-104 is a 4-channel amplifier that can accommodate both pairs of the GT7&rsquo;s that can drive up to 100W per channel @ 4-ohms.
Answered by: Joe G at Customer Service
Date published: 2017-03-09

Hi I'm looking to install this bluetooth amp with 2 front speaker and 2 rear speakers into my classic car and was wondering what speakers you would recommend for the best sound? Also, what size is the dash mounted control unit?

Asked by: SimonC
Hi Simon, We can't recommend speakers, this is something you will have to find out with the information from the manual of the amplifier: GTR-104 100W x 4, &le;0.1% THD+N @4ohm 120W x 4, &le;0.1% THD+N @2ohm Above shows the output power for the amplifier, and you should choose your speakers so they will match this power ( especially the resistance of the speakers ) The size of the dash mounted controls, this is 110mm x 48mm on the front. If you need to cut out room to fit it somewhere, the cutout needs to be 93mm x 34mm If you require further information, please contact us on customer.support@harman.com
Answered by: Kay Harman
Date published: 2017-06-05

How does this work with an existing aftermarket head unit since it requires it's own control? Does the control unit it includes have FM capabilities?

Asked by: Bmann
This will work well with existing aftermarket head-units since this will not take over the function of a head unit and will only act as a controller for the amplifier. The GTR-104's controller does not have tuner capabilities and only can accept sources via Bluetooth.
Answered by: Ren at Customer Service
Date published: 2016-12-27

i was wondering what cables go in the amp where the 'plus' + signs are? i cant seem to figure out which cables go there.

Asked by: perro
Thank you for your question, the amplifier has +positive signs are usually the positive side of the speakers also
Answered by: Randy at JBL
Date published: 2017-03-10
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