ZX350.4 / ZX650.4 / ZX850.4, Congratulations on your

		ZX.4SeriesAmpliﬁer
			Owner’sManual
FourChannelModels:		ZX350.4 / ZX650.4 / ZX850.4
	Authorized Kicker Dealer:		__________________________
Congratulations on your	Authorized Kicker Dealer:		__________________________
Congratulations on your
KICKER purchase!	Purchase Date:		__________________________
Please record your purchase	Ampliﬁer Model Number:		__________________________
information and keep your sales	Ampliﬁer Model Number:		__________________________
information and keep your sales
receipt for validation of warranty.	Ampliﬁer Serial Number:		__________________________
	Ampliﬁer Serial Number:		__________________________

Installation

1.Mounting Choose a structurally sound location to mount your Kicker ampliﬁer. Make sure there are no items behind the area where the screws will be driven. Choose a location that allows at least 4” (10cm) of open ventilation for the ampliﬁer. If possible, mount the ampliﬁer in the climate-controlled passenger compartment. Drill four holes using a 7/64” (3mm) bit and use the supplied #8 screws to mount the ampliﬁer.

2.Wiring Disconnect the vehicle’s battery to avoid an electrical short. Then, connect the ground wire to the ampliﬁer. Make the ground wire short, 24” (60cm) or less, and connect it to a paint and corrosion free solid metal area of the vehicle's chassis. Adding an additional ground wire of this same gauge (or larger) between the battery's negative post and the vehicle chassis is recommended.

The ZX ampliﬁer has dual input sensitivity differential RCA inputs which will receive either high or low level

signals from your car stereo’s source unit. Ideally, when connecting the source unit to the ampliﬁer, the

ZX ampliﬁer’s input level switch should be set to “LO” and a low-level signal should run from the source

unit’s stereo RCA output to the stereo RCA input on the end panel of the ampliﬁer using RCA interconnect

cable. If a low-level stereo RCA output is not available on the source unit, the signal can be delivered to

the ampliﬁer using the high-level speaker outputs on the source unit. Set the input level switch on the end

panel of the ampliﬁer to “HI”. Crimp and solder RCA connectors to the end of the speaker wire running

Figure 3

Bridged Operation (Mono)

Minimum impedance of 4 ohms while in bridged operation

24"

(60cm)

Ground

Remote

Turn-On

(45cm)

18"

+12V Fuse

Battery

Figure 4

Stereo and Mono Operation Simultaneously (SAMS)

Minimum impedance of 4 ohms bridged and 2 ohms per channel in stereo simultaneously

24"

(60cm)

Ground

Remote

Turn-On

(45cm)

18"

+12V Fuse

Battery

Bridge Wiring

+ -

Bridge Wiring

CONFIGURATION

	from the high-level speaker outputs on the source unit and connect the wire to the RCA Inputs on the end
	panel of the ampliﬁer as shown in					Figure 1
	Figure 1. Keep the audio signal cable		+	+ Core Cable		Figure 1
	Figure 1. Keep the audio signal cable	>	+	+ Core Cable
	away from factory wiring harnesses		To Source Unit			+
	away from factory wiring harnesses					+
	and other power wiring. If you need			Ground or Shielding		>
	to cross this wiring, cross it at a 90		High-level Speaker Output Wire	Ground or Shielding	To Ampliﬁer
			High-level Speaker Output Wire		To Ampliﬁer
INSTALLATION
	degree angle.
	Install a fuse within 18” (45cm) of the battery and in-line with the power cable connected to your ampliﬁer.

If you ever need to remove the ampliﬁer from the vehicle after it has been installed, the ground wire should be the last wire disconnected from the ampliﬁer--just the opposite as when you installed it. See the chart on the following page for power and ground wire size, and fusing recommendations.

3.Conﬁguration The following diagrams show the most common conﬁgurations for your Kicker ZX series ampliﬁer.

Figure 2

Four Channel Operation (Stereo)

Minimum Impedance of 2 ohms per channel in stereo operation

ModelZX350.4 1 (ONE) 40 AMPERE FUSE			PowerGroundWire 8GA
ModelZX650.4	1 (ONE) 80 AMPERE FUSE		PowerGroundWire 4GA
ModelZX850.4	1 (ONE) 120 AMPERE FUSE		PowerGroundWire 2GA
Performance
Model		ZX350.4	ZX650.4	ZX850.4

RMS Power in Watts, all channels driven @14.4		60 x 4	120 x 4	175 x 4
Volts, 4Ω stereo, ≤ 1% THD+N		60 x 4	120 x 4	175 x 4
Volts, 4Ω stereo, ≤ 1% THD+N

@ 2Ω stereo, ≤ 1% THD+N		90 x 4	170 x 4	215 x 4

@ 4Ω mono, ≤ 1% THD+N		175 x 2	325 x 2	425 x 2

Length: in(cm)		13 1/2 (34.2)	20 (50.7)	23 1/4 (59)

Speciﬁcations common to all models:

Height: in(mm)			2 1/8 (54mm)

24"

(60cm)

Ground

Remote

Turn-On

(45cm)

18"

+12V Fuse

Battery

	Width: in(mm)	9 5/8 (244mm)

	Frequency Response, ± 1 db:	20 Hz - 20 kHz

	Signal-to-Noise Ratio:	>95db, a-weighted, re: rated power

	Input Sensitivity:	Low Level: 125mV-5V
	Input Sensitivity:	High Level: 250mV-10V
		High Level: 250mV-10V

	Selectable Electronic Crossover:	Variable HI, LO or OFF (bypass), 50 - 200Hz, 12dB per octave

	Bass Boost:	Variable 0 to +18dB Bass Boost @ 40Hz

2	ZX.4AMPLIFIER

Note: To get the best performance from your new Kicker Ampliﬁer, we recommend using genuine Kicker Accessories and Wiring.

ZX350.4, ZX850.4, ZX650.4 specifications

The Kicker ZX Series amplifiers, which include the ZX650.4, ZX850.4, and ZX350.4, are designed to deliver high-quality sound and robust performance for audiophiles and casual listeners alike. Known for their reliability and powerful output, these amplifiers are ideal for powering a full range of speakers, including subwoofers, ensuring a rich audio experience.

The Kicker ZX650.4 is a 4-channel amplifier that produces 65 watts per channel at 4 ohms, making it suitable for driving component systems or rear speakers in a multi-channel setup. One of its main features is the adjustable crossover which allows users to tailor the frequency response to their specific speaker setup. Additionally, the ZX650.4 utilizes Kicker's patented Class D technology, which provides efficient power usage and minimizes heat generation, prolonging the lifespan of the amplifier.

Moving up in power, the ZX850.4 offers more oomph with 85 watts per channel at 4 ohms and can deliver up to 170 watts per channel at 2 ohms. This amplifier is engineered with advanced circuitry that includes a full variable crossover and a bass boost feature, allowing users to enhance low-frequency performance effortlessly. The ZX850.4's compact design facilitates easy installation in various vehicle types, while its durable construction ensures it can withstand the rigors of daily use and maintain performance in diverse conditions.

Finally, the ZX350.4 is a compact yet powerful solution for those who need a lightweight amplifier without compromising on sound quality. It provides 50 watts per channel at 4 ohms, catering perfectly to smaller speaker systems. This amplifier is particularly notable for its ease of use, featuring a simple setup with straightforward input connections. The ZX350.4 also incorporates Kicker's unique thermal and short-circuit protection systems, ensuring safe operation even in demanding audio environments.

All three Kicker ZX amplifiers feature a sleek design with a brushed aluminum finish and a variable digital bass boost, giving them a modern aesthetic that blends seamlessly with any vehicle's interior. With their user-friendly interfaces and versatile capabilities, the Kicker ZX Series amplifiers are an excellent choice for anyone looking to enhance their audio setup while enjoying high-quality, reliable performance.

FourChannelModels: