Additional InformationA 435-watt, four-channel, full-range powerhouse, the GX-A604 – with on-board variable electronic crossovers and variable Bass EQ on the rear channels – is certainly a versatile system building tool. With all that power inside a 2-1/16" (52mm) high, 8-1/8" (206mm) wide and 11 13/16" (300mm) deep package, the GX-A604 is easy to install yet can serve as the foundation of a truly sophisticated sound system. Features include a cast-aluminum heat sink, built-in electronic crossover networks and bass boos circuits. With almost seven decades of experience in bringing live music to life, JBL® has adapted many of our professional technologies for use in our car audio systems, transforming your road-going listening experience with new levels of power and clarity. Whether you’re looking at dramatically improving the sound of your factory installed audio system or designing a world-class competitive sound system from the chassis up, your JBL car audio retailer has everything you’re looking for. Crank up both the volume and the fidelity of your factory-installed sound system with the new GX Series amplifiers. Ranging from a compact stereo amplifier with enough power to drive the most demanding speaker systems, to the thunderous GX-A3001 with well over 400 watts of raw bass power to shake the ground, GX amplifiers cover the range at surprisingly affordable prices. There’s nothing wrong with your existing audio system that real power can’t fix, and GX series amps make adding that power easy. Setting up a sound system to fill your car takes not only great gear, but the ability to make all the components work together as an integrated whole. On board active crossovers and separate line- and speaker-level inputs make it easy to tie the new GX amps to the rest of your system, and carefully engineered Bass Boost circuits make it easy to get the sound you crave, whether you’re upgrading a factory system or building from scratch. For years, JBL’s engineers have made the gear that experts have relied on. Now, we also make gear that helps you perform like an expert.
A 435-watt, four-channel, full-range powerhouse, the GX-A604 – with on-board variable electronic crossovers and variable Bass EQ on the rear channels – is certainly a versatile system building tool. With all that power inside a 2-1/16" (52mm) high, 8-1/8" (206mm) wide and 11 13/16" (300mm) deep package, the GX-A604 is easy to install yet can serve as the foundation of a truly sophisticated sound system. Features include a cast-aluminum heat sink, built-in electronic crossover networks and bass boos circuits.
At a Glance:
85 Watts RMS X 4 channels @ 2 ohms
Supports 4-channel full range or high pass operation, 3-channel mixed mode, or 2-channels bridged for a subwoofer
Switchable (on/off) 12dB/octave 80HZ HP channels 3 and 4
Switchable (on/off) Bass Boost +12dB @ 45Hz on Channels 1 and 2
60 Watts RMS x 4 channels @ 4 ohms
4-Channel Full Range Amplifier
170 Watts RMS x 2 bridged into 4 ohms
Speaker Level inputs w/auto turn-on via MOLEX-style connector
Fully Variable 12dB/octave HP/LP/FLAT crossover on Channels 1 and 2
What's in the box:
1 x GX-A604
- Equipped with both low-level and high-level inputs
- The GX-A604 is equipped with both low-level and high-level inputs, allowing conncetion to virtually any factory or aftermarket head unit. Low-level input is made via standard RCA connectors and high-level inputs made via a supplied Molex connector and harness.
- Electronic crossover
- The 12dB per octave electronic crossover is fixed at 80Hz and can be selected either high-pass or low-pass. This allows the GX-A602 can be used as a an amplifeir to drive full-range speakers or as a subwoofer amplifier.
- Bass Boost circuit
- The GX-A602 also has an switchable bass boost circuit on the rear channels that adds a fixed at 45Hz and will provide+12dB of gain.
Legendary JBL Sound
You don't have to venture far from home to experience the legendary power of the JBL sound. Complete 5.1 home theater sound. Includes 4 satellite speakers, a center channel and room-shaking subwoofer.
Manuals & Downloads:
- Number of Channels
- 4 channels
- Signal-to-Noise Ratio
- Total Peak Power Output
- THD + N
- ;less than 1%
- Frequency Response
- Input Sensitivity
- Bridged Power Output
- 170W x 2 into 4 ohms
- 4-Ohm Power Output
- 60 Watts RMS x 4 channels
- Variable Bass Boost
- 0 to + 12dB @45Hz
- 2-Ohm Power Output
- 85 Watts RMS x 4 channels
- Width (in)
- Depth (mm)
- Height (mm)
- Depth (in)
- Width (mm)
- Height (in)
GX-A604 is rated out of 5 by 3.
Rated 5 out of 5 by PeterPips 007 from Van Instalation and it is wicked I have just had this installed in my Companies delivery van and it is awesome, it is firing a pair of 3 ways as Mid and Tweeter which I will change for a pair of JBL's now and an 8inch passive sub and it sounds great, got to get a monorail for the sub and use the GX-A604 for my high range in the dash, I am a JBL Lover any ways, I use the 2 control 10's in my home cinema set up. I highly recommend this amp to anyone.
Date published: 2018-02-11
Rated 5 out of 5 by MarkN1 from Great inexpensive amp! I'm using this amp driven by a JBL MS-8. The amp is a good step up from your typical 20W/channel systems. Very noticeable gain difference in that it plays loud and clean w/little distortion. Using 2 of 4 channels bridged for a passive sub and that works well too. Recommended.
Date published: 2016-11-17
Rated 4 out of 5 by Hristo from Great Amplifier but... I bought this amp and it has a lot of settings. But if you are connecting 2 middle speakers with 1 subwoofer ( or as my case only 1 subwoofer ) you definitely need power capacitator to power up the amp, otherwise, it will drop off when you pump the volume up. It's heating up so it's better to mount it in open space not in closed box or confined space
Date published: 2018-03-02
Sir , my question is i have to install amplifire and subwoofer in volkswagen polo highline plus Amplifire - GXA604H peak power 1200w Subwoofer - gtx 1300T What gauge of wire i'll use?
Hi! Normally, if you are connecting the subwoofer to the amp, you could use an 8-12" gauge wire.
Date published: 2018-05-31
What gauge of wire i'll use for gx a 604 1200 peak power
You will need 14-16 gauge wires for these amplifiers.
Date published: 2018-05-30
Can i use this to power my 4 jbl gx602’s?
Yes the GXA604 amplifier will work with the GX 602 speakers without any issues.
Date published: 2018-04-04
Can the GX-A604 power my GTO 609c component speakers and GT5-12 subwoofer?
Yes, that would be no problem at all.
Date published: 2018-01-28
Hello. Does this amp work in 3 channels? having 2 straight for components and the other 2 bridged for a subwoofer? Thanks :)
We would like to work with you directly to help you with your issue. 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.
Date published: 2018-01-11
I'm using the GX-604 4 channel amp with 4 JBL 6.5" CS762 coaxial speakers. What should I have be level set to? 0.2v or 4.0v? Thanks
Hi Ainsley, Thank you for the question. You might find the answer to your question in our Product Support FAQ and Knowledgebase Sections. The link is located at the top of this page. To submit a support case, please fill out the Contact Us form at the same location.
Date published: 2018-02-09
Good day all, I'm planning to buy a GX 602 for the rear speakers, while GX 402 for front speakers of my compact car. Is this GX A604 suitable for this setup?
Hi the GX 602 and the GX 402 can handle 60W and 35W respectively while the GX A604 drives 60W at 4 ohms which would be too much for the GX 402 than it can handle. I would suggest to choose a different speaker for the front that can handle 60W. If you need further assistance in looking for a speaker,Please submit a case request at https://www.harmanaudio.com/support-contact.html and the Customer Service Team will be more than happy to assist you.
Date published: 2017-12-13
Can I use the GX-A604 to power a JBL CS1204B subwoofer and 2 13cm speakers with a max 250W power output and 35W RMS, without loosing any sound quality? or should I just power the sub only? Thanks
The GX-A604 is can power the sub but it would be too much for the speakers since they can only handle 35 RMS while the GX-A604 only handles 60W at 4 ohms and 85W at 2 ohms. If you're planning on connecting the speakers I would advise not to crank it up too much as it may damage the speakers in the long run.
Date published: 2018-05-09
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