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Mobile Electronics› Vehicle Audio and Components

JBL

4-Channel Full-Range Car Amplifier

$179.95 $149.95 Save $30.00

SKU: GX-A604

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Special Order
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The JBL GX-A604 is a 4-channel, full-range car amplifier. It delivers 60 watts RMS x 4 channels at 4 ohms or 85 watts RMS x 4 channels at 2 ohms. This amplifier features on-board variable electronic crossovers and a variable Bass EQ on the rear channels. It includes both low-level RCA and high-level Molex inputs, allowing connection to various head units.
Show original supplier description
The JBL GX-A604 is a compact yet powerful 4-channel, full-range amplifier designed to elevate your car's audio system. It delivers a robust 60 watts RMS x 4 channels into a 4-ohm load, and can also output 85 watts RMS x 4 channels into a 2-ohm load. For even more flexibility, it can be bridged to provide 170 watts x 2 into 4 ohms. This versatile amplifier features on-board variable electronic crossovers that are fixed at 80Hz and can be set to either high-pass or low-pass, allowing it to drive full-range speakers or function as a dedicated subwoofer amplifier. The rear channels are equipped with a switchable Bass Boost circuit, offering up to +12dB of gain at 45Hz to enhance low-end frequencies. Connectivity is straightforward, with both low-level RCA and high-level inputs included. The high-level input utilizes a supplied Molex connector and harness, ensuring compatibility with virtually any factory or aftermarket head unit. Its compact dimensions—measuring just 2-1/16" high, 8-1/8" wide, and 11-13/16" deep—make installation easier, while the cast-aluminum heat sink ensures efficient heat dissipation.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandJBL
Part NumberGX-A604
CategoryMobile Electronics
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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