Zeus ZRX220A - Speaker Hifonics - Free user manual and instructions

Product Type	Amplified subwoofer (subwoofer)
Brand	Hifonics
Model	Zeus ZRX220A
RMS Output Power	1 x 300 W
Max Output Power	1 x 600 W
Speaker	2 x 20 cm (8 inches)
Low-pass Filter	40 – 150 Hz adjustable
Subsonic Filter	Fixed at 25 Hz
Phase Shift	0° / 180°
Bass Boost	0 – 12 dB @ 45 Hz
Power Supply	12 V (9 – 15 V), negative ground
Fuse	25 A
Dimensions (W x H x D)	280 x 103 x 580 mm
Audio Inputs	RCA and high-level input (Hi-Level)
Auto Turn On	Yes, via DC offset detection
Remote Bass Control	Yes, included
Protection	Red LED Protect for overheating or short circuit
Power Indicator	Green Power LED
Cleaning	Dry soft cloth
Safety	Disconnect battery before installation; fuse within 30 cm of battery

Frequently Asked Questions - Zeus ZRX220A Hifonics

How to connect the amplifier to the power supply?

First connect the GND terminal to the battery ground, then the +12V terminal via a fuse (25 A) within 30 cm of the positive pole. Finally, connect the REM terminal to the head unit's remote signal.

Can I use high-level and RCA inputs simultaneously?

No, never use both at the same time, as this could seriously damage the device.

How does Auto Turn On work?

Set the AUTO TURN ON switch to ON. The amplifier detects a 6V DC offset on the high-level input and turns on automatically with the source. No REM cable required.

How to adjust input sensitivity?

Set the head unit volume to halfway, then adjust the LEVEL potentiometer until you get a moderate sound level. This ensures power headroom and good signal-to-noise ratio.

What is the Bass Boost for?

The Bass Boost amplifies low frequencies from 0 to 12 dB at 45 Hz. Be careful not to overuse it to avoid distortion or speaker damage.

How to adjust the phase?

The PHASE SHIFT switch allows you to choose between 0° and 180°. This synchronizes the subwoofer's response time with other speakers for better acoustic integration.

What to do if the PROTECT LED lights up red?

This indicates overheating or a short circuit. Turn off the device, check speaker connections (too low impedance) and ventilation. The protection circuit automatically cuts off the amplifier.

What is the recommended impedance for speakers?

The impedance must be at least 2 ohms (or higher). Too low impedance may trigger protection or damage the amplifier.

How to clean the speaker?

Use a soft dry cloth. Avoid chemical or abrasive products that could damage the surface.

Can I install the amplifier myself?

Yes, but it is recommended to have installation done by a specialist to avoid damage to the vehicle or device. Follow safety instructions: disconnect the battery before starting.

USER MANUAL Zeus ZRX220A Hifonics

Close-up of a black ZEUS HIFONICS device with four circular vented slots (no visible text or symbols on body)

BEDIENUNGSANLEITUNG

USER'S MANUAL

MODE D'EMPLOI

MANUALE D'USO

MANUAL DE USO

ACTIVE

SUBWOOFER

SYSTEM

ZRX220A

INHALTSVERZEICHNIS TABLE OF CONTENT TABLE DES MATIÈRES SOMMARIO INDICE

LINE IN LOW LEVEL INPUT L R 7

HOCHPEGELEINGÄNGE

8 + L + R HI LEVEL INPUT L -

AUTOMATISCHE EINSCHALTFUNKTION

10 LEVEL MIN MAX

Please read the user's manual carefully before the installation and the first operation of the amplifier.

SPECIFICATIONS	ZRX220A
Subwoofer	2 x 20 cm (8")
Output Power RMS	1 x 300 W
Output Power Max	1 x 600 W
Lowpass Filter	40 – 150 Hz
Subsonic Filter	Fixed at 25 Hz
Phase Shift	0° / 180°
Bass Boost	0 – 12 dB @ 45 Hz
Operating Voltage	+12 V (9 – 15 V), negative ground
Fuse Rating	25 A
Dimensions (B x H x L)	280 x 103 x 580 mm

All Specifications are subject to change

IMPORTANT NOTES PRIOR TO INSTALLATION

• This device is only suited for a 12 volt system with negative ground.
• Ensure that the input and output cables are sufficiently separated from the power supply cables. Otherwise, interferences may occur.
• Ensure the accessibility of the fuse and the operating elements after installation.
• The reliability and performance of the amplifier depends on the quality of installation. Preferably consult an expert to install the system.
• Avoid any damage or removing of the components of the vehicle like wires, cables, board computer, seat belts, gas tank or the like.

POWER SUPPLY AND TURN-ON-CONNECTION

ATTENTION: Before you start with the installation, disconnect the ground connection from the vehicle's battery in order to prevent short circuits.

The power wiring which is usually installed in on-board car networks is not sufficient for a power amplifier's demands. Make sure that the power wires to GND and to the +12V terminal has been sufficiently specified.

First connect the GND terminal [6] of the amplifier to an appropriate ground connection at the chassis. To ensure a good connection, residue dirt and dust from the connection point. A loose connection may cause malfunctions or interferences noise and distortion.

Then connect the +12 V terminal [4] of the amplifier with the battery by using an appropriate cable including an in-line fuse. This fuse [2] should be located very close to the battery [1]; for safety reasons not more than 30 cm away. Only insert the fuse when the installation, including the connection of the loudspeakers, has been accomplished.

Then connect the remote turn-on-wire [3] from the head unit with the amplifier's REM terminal [5]. A cable with a cross-section of 0.5mm^2 is adequate.

32 POWER INPUTS +12V REM

AUDIO SIGNAL CABLES

When installing the audio cables between the RCA outputs of the head unit and the RCA inputs of the amplifier [7], the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We recommend a separated installation, e.g. routing the power cable through the cable channel on the left side and the audio cables through the cable channel of the vehicle on the right side or vice versa. This prevents interferences due to crosstalk into the audio signal.

7 LINE IN LOW LEVEL INPUT L R

HIGH LEVEL INPUTS & AUTO TURN ON

The high level inputs under HI LEVEL INPUT [8] is suitable to connect the device input with speaker wires, if your head unit is not equipped with pre-amplifier RCA outputs. Extend therefore every regarding speaker cable from your head unit with appropriate speaker cables from your car audio retailer to the mounting location of the amplifier. Then connect the each matching loudspeaker cable with the cables of the included High Level Input jack.

CAUTION: Never use the high level inputs and the RCA inputs at the same time. This may damage the device seriously.

8 +L L + R R - HI LEVEL INPUT

AUTO TURN ON

Push the AUTO TURN ON switch [9] to ON position. The amplifier detects now a voltage rise (6 Volts) over the connected input signal on the HI LEVEL INPUT [8] when the head unit will be switched on. Hence, the amplifier will also be turned on. As soon as the head unit will be turned off, the amplifier turns also automatically off. In this case the turn-on connection [3] is not needed.

NOTE: The AUTO TURN ON function usually works with 90% of all head units, because they are equipped with "High Power"-outputs. Only with a few older and still existing head units the Auto Turn On function is not working.

9 AUTO TURN ON ON OFF

INPUT SENSITIVITY

Turn the LEVEL [10] controller of the amplifier to the MIN position. Then turn the volume controller of the head unit to 80 - 90% of its full setting. Now turn LEVEL [10] clockwise until you hear some distortion. Then turn back LEVEL [10] slightly until you hear a cleaner sound.

10 LEVEL MIN • MAX

VARIABLE BASS BOOST

By using the BOOST controller [11] you are able to increase the bass enhancement from 0 to 12 dB. ATTENTION: Use the BASS BOOST wisely!

PHASE SHIFT SWITCH

The PHASE SHIFT switch [12] allows to switch the phase from 0° to 180° to match the output signal with the vehicle's interior acoustic.

12 PHASE 0° 180°

VARIABLE LPF FILTER

Set the desired crossover frequency by using the controller LPF [13]. Thus to that only the frequencies below the chosen crossover frequency will be amplified and the subwoofer plays more precisely and efficient.

13 LPF 40Hz 150Hz

With the included bass level cable remote controller [15] allows to adjust the bass level e.g. out of the driver's seat. Connect the remote controller and the BASS LEVEL CONTROLLER terminal [14] with the enclosed cable.

graph LR
    A["BASS LEVEL CONTROLLER"] --> B["BASS LEVEL"]
    B --> C["MIN MAX"]
    C --> D["HIFORICS"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333

PROTECTION CIRCUIT

The PROTECT LED [16] lights up red, when the amplifier is overheated, or a short circuit occurs respective a too low impedance load is connected to the speaker outputs. If this events, the internal built-in protection circuit shuts down the amplifier automatically. The amplifier should work again properly after you have solved the problems.

The POWER LED [17] lights up green, if the amplifier is in operation.

graph LR
    A["16"] --> B["○ ○"]
    B --> C["17"]

LINE IN LOW LEVEL INPUT L R 7

ENTRÉE HAUT NIVEAU

8 +L + R HI LEVEL INPUT L R-

FONCTION ALLUMAGE AUTOMATIQUE

10 LEVEL MIN MAX

BASS BOOST RÉGLABLE

LINE IN LOW LEVEL INPUT L R

INGRESSO ALTO LIVELLO

8 + L + R HI LEVEL INPUT L R -

10 LEVEL MIN MAX

BASS BOOST REGOLABILE

CONTROLLO REMOTO DAL LIVELLO DEI BASSI

7 LINE IN LOW LEVEL INPUT L R

ENTRADAS DE ALTO NIVEL

8 +L L + R R - HI LEVEL INPUT

AUTO ENCENDIDO

10 LEVEL MIN MAX

BASS BOOST REGULABLE

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