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Kicker 08ZX850.4

850W RMS, 4-Channel ZX Series Amplifier (ZX850.4, 08ZX8504, ZX8504)

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The product on this page is discontinued.
  • ZX Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 175 watts x 4 chan.
    • 2 ohms: 215 watts x 4 chan.
    • Bridged, 4 ohms: 425 watts x 2 chan.
  • Max power output: 850 watts x 2 chan.
  • MOSFET power supply
  • Wired remote bass level control included
  • LED power and protection indicators
  • Tuned Bass EQ (0-18 dB bass boost at 40 Hz)
  • Balanced differential inputs make KICKER ZX Amplifiers compatible with any factory radios
  • Eliminates unwanted noise in a system
  • Boost, gain, and crossover frequencies are top-mounted for easy access, and a handy protection indicator featuring a new flashing yellow low-voltage light enhances the end panel
  • Bridgeable operation
  • Speaker-level inputs compatible (switchable) through RCA connection, Kicker 09ZISL required and sold separately
  • Automatic turn on modes: remote, DC offset, or signal sense
  • Thermal, voltage, and short circuit protection circuitry
  • Variable high-pass filter (50-200 Hz, 12 dB/octave)
  • Variable low-pass filter (50-200 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20000 Hz
  • Dimensions: 23-1/4"L x 9-5/8"W x 2-1/8"H
  • 8-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • Authorized Internet Dealer
  • 2-year Manufacturer's warranty

Extend your Kicker warranty to 3 Years when you install your new Kicker amplifier with a compatible Kicker power kit! For a limited time, you can register your Kicker amplifier and power kit to qualify for an additional year of coverage. This offer is only available through official Kicker dealers and will only last for a limited time. With this amplifier, the following power kits will qualify for the extended warranty program: Kicker 09PK4, Kicker 09PKD4, Kicker CK44, Kicker 09ZCK44, and Kicker 09PKD1.

Product History:
Kicker 08ZX850.4 thumbnail
(newest, current model)
Kicker ZX850.4 thumbnail
(previous model, replaced by Kicker 08ZX850.4)
Kicker KX850.4 thumbnail
(previous model, replaced by Kicker ZX850.4)

Sonic Electronix, Inc. can only ship Kicker products within the United States of America.

Power Specifications - Full Range Channels
RMS Power @ 4 ohms175 watts x 4 channels
RMS Power @ 2 ohms215 watts x 4 channels
RMS Power @ 1 ohmNot Stable
Bridged RMS Power425 watts x 2 channels
Peak Power Output850 watts x 2 channels
Amplifier Specifications
Amplifier ClassAB
Number of Channels4
Total Peak Power Output1700 watts
Total RMS Power Output860 watts
Maximum Input Gauge Size1/0 AWG
Minimum Impedance Unbridged2 ohms
Minimum Impedance Bridged4 ohms
THD at Rated RMS Power1%
Speaker Level InputsYes
Preamp OutputsNo
Built-in CrossoverLow-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency50 - 200 Hz
Low-Pass Crossover Frequency50 - 200 Hz
Subsonic FilterN/A
Signal-to-Noise Ratio95 dB
Channel SeparationN/A
Bass Boost0 - 18 dB
Bass/Gain RemoteYes
Fan CooledNo
Fuse Rating40A x 3 
CEA-2006 CompliantYes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration2 years
Labor Warranty Duration2 years
Warranty ProviderManufacturer
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Amplifier Wiring Kits
Get the wires you need to properly install and power your car amp.
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Complete 4 Gauge Amp Wiring Kit with RCA Interconnect Cables and Speaker Wire!
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Kicker PKD4Kicker PKD4
Dual Amplifier 4 Gauge Amp Installation Kit w/ Distribution Blocks
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End Caps
Optional end caps provide a stylish finish to your amplifier. They'll also conceal the wires for a stealth install.
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Kicker ZXEC (08ZXEC)Kicker ZXEC (08ZXEC)
Gives a clean install look and protects connection terminals and settings.
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Speaker Wire
Improve the sound quality by delivering more power when replacing your factory wiring. High quality speaker will maximize your amplifier investment and system performance.
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Kicker XW1220 Speaker WireKicker XW1220 Speaker Wire
12 Gauge Wire - 20 ft. of Dual Twist Speaker Cable with Sleeves for a Clean Install
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StreetWires SCP1215BL - 12 AWG Speaker WireStreetWires SCP1215BL - 12 AWG Speaker Wire
12 Gauge Wire - 15 ft. of Speaker Cable with Twisted Construction
$19.99
RCA Interconnects
You will need a good set of RCA interconnect cables to connect your amplifier to your head unit. Using high quality cables ensure the best sound possible by reducing unwanted noise interference, providing tight contacts, and utilizing the latest in cable technology.
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Kicker X-Series RCA Interconnect CableKicker X-Series RCA Interconnect Cable
19 ft. of 4-Channel X-Series RCA Cable with dual twisted-pair conductors, hyper-flex technology, and gold-plated k-cut collars for excellent signal transfer.
$36.99
Monster Cable 400 Series XTREME RCA Interconnect CablesMonster Cable 400 Series XTREME RCA Interconnect Cables
16.4 ft of 4-Channel XLN+ XTREME RCA cable with 8-cut turbine MirrorChrome connectors, Xtra Low Noise (XLN) construction, and 3-Way Time Correct Windings for the ultimate in signal transfer.
$109.00
Installation, Tools & Accessories
With our professional install card, you can have your amp installed by a pro near you, or you can purchase tools and do the install yourself.
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StreetWires FB4StreetWires FB4
4 AWG / 4 Gauge Firewall Bushing
$7.99
Kicker DB1448 (09DB1448) - Top of the Line!Kicker DB1448 (09DB1448) - Top of the Line!
Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs
$18.99
Professional Installation for your Car Power AmplifierProfessional Installation for your Car Power Amplifier
Covers labor charges through our professional installer network.
$89.99
Testing and Performance
Optimize your system's performance with testing tools such as SPL meters, bass test discs and more!
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AutoSound 2000 CD-104AutoSound 2000 CD-104
The ultimate amplifier level setting disc used for evaluation of audio components
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
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Related products
Kicker CK44
4 Gauge 4-Channel Complete Amp Kit • 20' 4 AWG Power Wire • 3' 4 AWG Ground Wire • 20' 16 AWG Remote Lead • 5M (16.5') 4-Channel RCA Cables • 60' 16 AWG Speaker Wire • 100A ANL Fuse and Holder
Kicker PKD1
1/0 Gauge Dual Amp Power Kit • 20 ft. 1/0 AWG Power Wire • 3 1/0 AWG Ground Wire • 20 ft. 16 AWG Remote Wire • 300A ANL Fuse and Holder • 2 Distribution Blocks • 5 ft. 4 AWG Power Wire • 5 ft. 4 AWG Ground Wire

Product Summary

Manufacturer: Kicker
Model number: 08ZX850.4
Product manual: Download the Kicker 08ZX850.4 Product Manual
UPC: 713034041665
Weight: 18.00 lbs
Internal SKU: 08zx8504
Internal product ID: 11523
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Customer Testimonial

Re SonicElectronix.com, they did a fantastic job, ordered on friday night, got the sub the next wednesday before a road trip packed in two boxes utilizing free shipping to Denver. Their prices are solid and the service is really excellent.

- bi-costal local

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