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2-channel car amplifier with Bluetooth® connection — 100 watts RMS x 2

Item # 109GTR102

JBL's GTR-102 2-channel car amplifier can deliver 100 watts RMS per channel to a set of speakers —...

JBL's GTR-102 2-channel car amplifier can deliver 100 watts RMS per channel to a set of speakers —...

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About the JBL GTR-102

Power delivered in style

JBL's GTR-102 2-channel car amplifier can deliver 100 watts RMS per channel to a set of speakers — serious power from a compact chassis that exudes style. Even better, you can stream music directly from a Bluetooth device to this amp, while its built-in processing restores the excitement in your music that data compression removes.

Power delivered in style

JBL's GTR-102 2-channel car amplifier can deliver 100 watts RMS per channel to a set of speakers — serious power from a compact chassis that exudes style. Even better, you can stream music directly from a Bluetooth device to this amp, while its built-in processing restores the excitement in your music that data compression removes.


You can stream music from a Bluetooth device directly to this amp for convenient, wireless play that bypasses your car's radio. You can connect the amp's preamp outputs to a subwoofer amp, like the matching JBL GTR-601 or GTR-1001, so your music will have plenty of low-end punch. The Party Mode feature allows up to three different sources to stream, so more people can join in the fun.

Restores the excitement in your music

Downloaded digital music and streaming services apply data compression to their files so you can store more songs on your devices, but compressed music sounds noticeably duller than uncompressed files. Harman's Clari-Fi™ sound restoration technology improves the sound quality of your digital music by analyzing the data and then reconstructing the parts that were removed during the compression process. You get crisper highs, increased dynamics, clearer vocals, and fuller music. The included wired remote gives you handy controls for Bluetooth streaming, hands-free calling, Party Mode, and Clari-Fi signal processing.


Need some bass power? You can switch the GTR-102 into bridged mode and drive a subwoofer with 240 watts RMS. The variable high- or low-pass filter optimizes the amp's output to your speakers, increasing the efficiency of the system. The GTR-102 can accept low- or speaker-level inputs so it'll work in almost any system, and JBL includes RCA-to-speaker wire adapters for your convenience.


JBL GTR-102 control panel


Product highlights:

  • 2-channel car amplifier
  • 100 watts RMS x 2 at 4 ohms (120 watts RMS x 2 at 2 ohms)
  • 240 watts RMS x 1 in bridged mode (4-ohm stable in bridged mode)
  • Clari-Fi™ sound restoration technology improves the sound of your digital music
  • built-in Bluetooth allows you to stream music directly to the amp
  • variable high- and low-pass filters (32-320 Hz, 12 dB/octave)
  • wired remote unit has controls for Bluetooth streaming, hands-free calling, Party Mode, and Clari-Fi signal processing
  • preamp inputs and outputs
  • speaker-level inputs (speaker wire-to-RCA adapters included)
  • fuse rating: 30A x 1
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 8-7/8"W x 2-3/16"H x 7-1/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # GTR-102

What's in the box:

  • 2-Channel amplifier
  • Two 30A ATO fuses (1 installed)
  • Control panel with attached 19.5' cable
  • Control panel flush mount sleeve
  • Control panel mounting bracket
  • 2 M4 x 10mm bracket screws
  • 2 Bare wire-to-RCA adapters
  • Remote plug (Euro or Phoenix connector)
  • 4 Mounting screws (M4 x 52mm)
  • Quick Start Guide

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Product Research


Overview: The JBL GTR-102 is part of the GTR Stadium series of high-performance amplifiers. This full range Class D 2-channel amplifier will accept both high-level and low-level inputs. Class D amplifiers are highly efficient and compact, generating lots of power without drawing much current or generating heat. The GTR-102 includes Clari-Fi, an audio restoration feature that improves the sound of compressed digital files. The amp also includes a cabin-mounted control panel to give you amplifier control at your fingertips. The unit comes with spare fuses, speaker wire-to-RCA adapters, and mounting hardware.

Power Output: The GTR-102 delivers the following power output:

  • 100 watts RMS x 2 at 4 ohms (<0.1% THD+N)
  • 120 watts RMS x 2 at 2 ohms (<0.1% THD+N)
  • 240 watts RMS x 1 at 4 ohms bridged (<0.3% THD+N)

Clari-Fi: Clari-Fi is a proprietary technology that analyzes compressed digital music files and improves them in real time. Using a predictive algorithm that restores audio content that is lost during the compression process. Clari-Fi provides extra bandwidth, especially in the high frequencies, widens the sound stage, and gives vocals a natural warmth not found in compressed files.

Control Panel: The amplifier comes with a wired control panel that provides numerous features not typically found with amplifiers. It has Bluetooth technology, and an omni-directional microphone for accepting and ending phone calls from your cell phone. Party Mode lets you pair multiple Bluetooth devices for streaming music from anyone's phone. The control panel also lets you activate the Clari-Fi feature. The panel is 4-7/16"W x 15/16"H, and has a 19.5-foot cable. It can be flush- or surface-mounted with the supplied brackets.

ADAS: The GTR-102 has an interface for the Advanced Driver Assistance System (ADAS) that can override the audio source input to deliver a message or other audio from a connected ADAS accessory. On the amplifier, you can designate which speaker the ADAS signal is output: Front left, front right, rear left, or rear right.

Protection Circuitry: The amplifier features protection circuitry for thermal overload, over- or under-voltage (<9V or >16V), and short circuits. The LED on the top of the amp glows red if the amp goes into protection mode.

Controls: The GTR-102's controls are located on one side of the amplifier. The rotary controls require a small screwdriver (not included) to make adjustments. The amp controls include:

  • Gain: The rotary gain control lets you match the amp's input sensitivity to the output of the source unit. The input sensitivity range of the amplifier is 0.2V and up for a low-level input, and up to 20V for speaker-level input.
  • Input Level: The Input Level switch lets you select the type of input you are using. For high-level input, there are two settings: Hi1 and Hi2. If the audio system fails to play with an amplifier connected to its output, or you get a "speaker disconnected" message on your factory stereo, set the switch to the Hi2 position. The Hi2 position includes a circuit design to fool this type of factory system into "seeing" a speaker connected to its output.
  • Crossover: The amp features a switchable crossover that can be set to low pass (LPF), high pass (HPF), or Full Range. You can adjust the cutoff frequency of the crossover from 32Hz to 320Hz using the rotary control.

Connections: The JBL GTR-102 uses set screw terminals for the +12V power, ground, and speaker outputs. The screws can be tightened/loosened with a Phillips-head or flat-head screwdriver (not provided). The amp connections include:

  • Power/Ground: The +12V Power and Ground terminals will accept up to 4-gauge wire. It is recommended that you use a minimum of 8 AWG power wire to the battery, with an in-line 30A fuse (or higher) installed no more than 18" from the battery terminal. An 8 AWG ground wire (minimum) is also recommended, and attached to a metal area close to the amplifier.
  • Remote Turn-On: The Remote turn on wire connects to the supplied plastic 2-pin Euro or Phoenix connector. The connector has tiny set screws to tighten the wire, and requires a precision screwdriver (2.4mm or 3/32"). The connector has "IN" and "OUT" terminals, allowing you to daisy chain the turn-on signal to another amplifier, if needed.
  • Speaker Outputs: The amp features screw terminals for connecting two speakers. There are markings on the terminals for bridging the amplifier.
  • Speaker-Level Input: The amp includes two bare wire-to-RCA adapters for connecting the amp to a factory radio or aftermarket head unit without preamp outputs. You should attach the left and right speaker wires from the head unit to each adapter and plug the adapter's RCA plug into the amp.
  • Line-Level Inputs: The amplifier is equipped with one pair of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp.
  • Pre-Out: A second pair of RCA jacks is provided to output the audio signal to a second amplifier, if desired.

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Customer Q&A

Crutchfield asked: Why did you buy this?
Digital amp less draw. Building stereo for bicycle application. Also, I like the display with Bluetooth capabilities. [ MATT  Aug 21, 2019 ]
price point [ Eric  Aug 16, 2019 ]
Recommended by Q [ Robert  Aug 06, 2019 ]
Blue tooth audio with out head unit. Installing in my 1955 Chevy panel truck with Pioneer KP 500 super tuner. [ Rob  May 07, 2019 ]
Birthday gift for sister. [ Arthur  Jan 08, 2019 ]
Good price and name brand quality [ Gregory  Jan 03, 2019 ]
A gift for me for my 1970 Challenger RT Hemi that is fully restored with the original AM Radio I want a modern upgrade without it being seen it will mount out of sight. [ EDWIN J  Dec 08, 2018 ]
Needed a Bluetooth compatible power amp for installation in a classic car (no head unit in the dash). [ Robert  Nov 20, 2018 ]
SMALL SIZE [ TIMOTHY  Oct 23, 2018 ]
advice [ Chris  Aug 20, 2018 ]
Recommended by Dwight [ RONALD G  May 07, 2018 ]
This amplifier allows me to run sound in my car without a head unit. In a tiny car like mine, that makes for a large advantage over other options. Wiring is greatly simplified and opportunities for noise introduction are low. Being that I use my phone via bluetooth for 90% of my listening, this is the perfect solution for me. Also, the efficiency of the class D design allows me to waste less power coming from my small alternator! [ Javan  May 02, 2018 ]
Bluetooth. Adding it to my boat. [ Douglas  Feb 28, 2018 ]
It was the right spec, respected brand, great price [ Ross  Jan 04, 2018 ]
Nearly identical to Infinity Kappa K4 so took recommendation of Dee at on line chat. [ Danny  Dec 13, 2017 ]
It fit my need. [ Coy Sylvester  Nov 10, 2017 ]

8 questions already asked

I want to know if I need a radio head, or can I just power the unit hook up speakers and just stream music from my phone? Going in classic car and have no room for radio unit.
[ Todd  Jul 27, 2019 ]
3 answers
You can just stream from phone. Pandora, iTunes, tunein radio. They all work great with Bluetooth.
[ David B.  Aug 07, 2019 ]
You do not need a head unit, you can stream music via Bluetooth from your phone to the amplifier. It's perfect for classic cars from what I've seen.
[ jordan  Aug 07, 2019 ]
That's exactly what I did. Works very well and never miss a head unit.
[ Michael  Aug 07, 2019 ]
Will an 18 f150 head unit control this via Bluetooth to power a sub?
[ Bradfield  Jul 13, 2019 ]
1 answer
Not sure about your truck radio controlling this unit. I think the latency of the bluetooth connection would be unbearable. I use mine to receive audio from my phone and output to speakers. Does a good job of that.
[ Elevat0r  Jul 15, 2019 ]
Can I use pre-out to run a subwoofer amp?
[ George  Mar 21, 2019 ]
3 answers
Yes though you will not be able to achieve the same low level frequencies that a mono amp can produce.
[ Laurence  Mar 27, 2019 ]
Yes you can.
[ Luis  Mar 27, 2019 ]
Yes you can. That is how I have mine connected.
[ Stephen  Mar 27, 2019 ]
How do you adjust the volume with the control panel? Does it also have EQ adjustments? I would like to use this instead of a head unit in my Miata.
[ Trent  Feb 23, 2018 ]
1 answer
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Mar 01, 2018 ]  Staff
Does the Pre Out still work when using Bluetooth?
[ Luke  Feb 04, 2018 ]
1 answer
Yep! The JBL GTR-102's preamp output connection is active while using the built-in Bluetooth connection. Hope that helps!
[ Larry  Feb 09, 2018 ]  Staff
Can this be used without a stereo head unit? Just the remote and streaming Bluetooth?
[ David  Oct 25, 2017 ]
2 answers
Yes and this is precisely why I purchased this. I have an older jeep with no place for a hu. Threw this in there and couldn't be happier. I would imagine this is the way of the future
[ ALAN A  Oct 26, 2017 ]
Yes, I turn my head unit off when streaming.
[ Stephen  Oct 25, 2017 ]
Do you have to use the display panel? Can I just run the amp solo.
[ George  Jul 26, 2017 ]
1 answer
The Control Panel is required in order to use the amplifier's built-in Bluetooth technology and the Clar-Fi processing. If you don't want and/or need to use those features however, you don't have to use the Control Panel. For more details or to discuss further, please feel free to contact an Advisor directly by phone (888.955.6000) or online chat. Thanks! My bio:
[ Larry  Aug 01, 2017 ]  Staff
If hooking this up in bridged mode for use with a subwoofer can you still stream Bluetooth to your factory speakers?
[ Matt  May 10, 2017 ]
1 answer
The audio from your Bluetooth device would only be streamed through the speakers/sub(s) you have connected to the JBL GTR-102 amplifier. For more details or to discuss further, feel free to contact an Advisor directly by phone (1-800-324-9695) or online chat.
[ Larry  May 15, 2017 ]  Staff

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