Ground Zero GZTA 5120X-II User manual

TITANIUM-SERIES

AMPLIFIER

OWNER’S MANUAL

GZTA 5120X-II

Features

•4 Ohm / 2 Ohm stable Stereo

•Mosfet dual power supply

•Power & Protection indicator

•Variable 12dB bass boost (45Hz) (Channel 5)

•Variable high pass filter

•Variable low pass filter

•Variable subsonic filter (Channel 5)

•Adjustable input sensitivity

•Soft delayed remote turn- on

•Remote control (Channel 5)

•Thermal / Short / Overload protection

Tools and materials you need

•Screwdriver

•Electric drill, 3 mm / 0.12” carbide drill bit

•Mounting screws

•Power wire min. 20 mm² / 4 AWG

•Ground wire min. 20 mm² / 4 AWG

•Speaker wire min. 2 x 1,5 mm² / 15 AWG

Please note!

•As a precaution it is advisable to disconnect the vehicle’s battery before making connection

to the +12 Volts supply wiring (see owner’s manual of your car for further information).

•Please use great caution drilling your trunk. Your gas tank and brake lines can be damaged by puncturing with your drill bit –

this could cause damage or failure of your cars operating systems.

•Never pass wires over sharp angles. It is recommended to buffer the power supply of the amplifier with an capacitor min. 1

Farad to guarantee a stable operation voltage.

WARNING !

High powered audio systems in a vehicle are capable of generating "Live Concert" levels of sound pressure. Continued exposure to

excessively high volume sound levels may cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio

equipment at high volume levels may impair your ability to hear

external sounds such as; horns, warning signals, or emergency vehicles, thus constituting to a potential traffic hazard. In the interest of

safety, Consumer Electronics recommends listening at lower volume levels while driving.

Planning your system

Before beginning the installation, consider the following:

1. If you plan to expand your system by adding other components sometime in the future, ensure adequate space is left, and

cooling requirements are met.

2. If your radio / source is equipped with pre-amp outputs, it is possible to utilize them to drive the amplifier and connecting

(amplifier) to the 2 rear speakers.

Mounting your amplifier

a. Select a suitable location that is convenient for mounting, is accessible for wiring

and has ample room for air circulation and cooling.

b. Use the amplifier as a template to mark the mounting holes, remove the amplifier

Warning

Chose a mounting position where all electric wires are protected from being damaged by sharp edges, heat or other conditions. +12Volt

DC electrical connections must be fused on the battery side. Make sure your radio and all other devices will be turned off while connection

your system.

If you need to replace the power fuse, replace it only with a fuse identical to that supplied with the system. Using a fuse of different type or

rating may result in damage to this system which isn’t covered by the warranty.

Controls and functions

Speaker terminals

For connection of the speakers

Power terminals

GND -> Ground connection

REM -> Remote antenna terminal

BATT -> +12 Volt

Satus indication

GREEN – OK

RED – Error

Cinch inputs

Terminal for connection of the RCA wires.

To avoid failure, please use high quality RCA wires.

Input level controller

With this controller you can adjust the input sensitivity.

Mode switch

Adjust the crossover for the chosen utilization.

LPF – Only bass frequencies (below 40Hz - 4000Hz) (Channel 5: 40Hz –

250Hz) will be reproduced.

FULL – All frequencies will be reproduced.

HPF – Only middle and high frequencies over 40 Hz – 4000 Hz will be

reproduced.

High Pass controller

(Subsonic)

Set the filter switch to „HIGH“ position.

Adjust the variable HPF crossover frequency to the desired frequency using

the controller. All frequency between 40 Hz – 4000 Hz will be reproduced.

Filter controller

Depeding on the mode switch position, High- or Lowpassfilter can be

adjusted in a range from 40 Hz – 4000 Hz with this controller.

Subsonic controller

(GZTA 5120X Channel 5)

For adjusting the subsonic filter in a range from 10 Hz to 50 Hz.

Input mode switch

You can chose if the 5th channel of GZTA 5120X should be operated with

Cinch input 5/6 or the summation of input 1/2/3/4.

Remote control input

For connection of the bass remote control.

Turning on the amplifier

The amplifier automatically turns on a few seconds after you turn on your radio.

Note: Your amplifier temporarily shuts down if it gets too hot, then restarts automatically once it cools

(At about 80° / 176° F).

Adjusting the audio level

1. LEVEL (Min/Max): Turn fully counter- clockwise to MIN position

2. Turn the auto sound system's volume control to about two-third of its full range.

3. Adjust LEVEL to a comfortable listening level.

Stereo wiring

Bridged wiring

Trimode wiring

Connecting the speaker for trimode operation - notes

TRI MODE operation output allows a subwoofer to be operated in mono mode while the main speakers are playing in stereo. Leave the

crossover switch on “Full” position.

Use 100 volt, non-polar capacitors for a high pass crossover to filter out low frequencies and Air- core or

Ferrit- ore coils with a minimum diameter of 1 mm / 0.039” for the lowpass crossover to filter out high frequencies.

The capacitor and inductor values as written in the below table. The front and rear channels of this amplifier get this capability. Only the

rear left and right channels are shown on the following pictures.

Values for 6dB passive crossover

Frequency

Inductor

Capacitor

80 Hz

7,5 mH

470 uF

100 Hz

6,5 mH

330 uF

120 Hz

5,5 mH

370 uF

150 Hz

4 mH

220 uF

Specifications

Model

GZTA 5120X-II

Type

5 Channel Class A/B

RMS Power @ 4

Ω

CEA Standard CEA-2006-A

4 x 50 W & 1 x 180 W (1% THD+N)

RMS Power @ 2

Ω

CEA Standard CEA-2006-A

4 x 70 W & 1 x 260 W (1% THD+N)

RMS Power @ 4ΩBridged

CEA Standard CEA-2006-A

(1% THD+N)

2 x 130 W (Channel 1 – 4)

RMS Power @ 4ΩBridged

CEA Standard CEA-2006-A

(10% THD+N)

2 x 170 W (Channel 1 – 4)

Damping factor

> 100

Signal to noise Ratio

> 75 dB

Lowpass

40 Hz – 4000 Hz (Channel 1 – 4)

& 40 – 250 Hz (Channel 5)

Highpass

40 Hz – 4000 Hz (Channel 1 – 4)

Subsonic filter

10 Hz – 50 Hz (Channel 5)

Bandpass filter

10 Hz – 250 Hz (Channel 5)

Phaseshift

Frequency response

5 Hz – 38 KHz

(± 1 dB)

Input sensitivity

200 mV – 9 V

(± 5%)

THD

< 0,1 %

Bass remote control



Fuse

2 x 35A

Dimensions

W x H x L mm

230 x 53 x 476

Dimensions

W x H x L inch

9.04” x 2.09” x 18.74“

Trouble shooting guide

Symptoms

Check Points

Cure

No sound

Is the POWER LED illuminated?

Check fuses in amplifier.

Be sure remote lead is connected.

Check signal leads.

Check again control.

Check tuner/deck volume level.

Is the diagnostic LED illuminated?

Check for speaker short or amplifier

overheating

Amp not switching on

No power to the amplifier

Check power wire or connections

No power to remote wire with

receiver on Check connections to radio

No sound in one channel

Check speaker leads

Inspect for short circuit or an open

connection

Check audio leads

Reverse left and right RCA inputs to

determine if it is occurring before the

amp

Amp turning off at medium / high

volume

Check speaker load impedance

Be sure proper speaker load

impedance recommendations are

observed

(If you use an ohm meter to check

speaker resistance, please remember

that DC resistance and AC

impedance may not be the same.)

Protection LED is on

Temperature shut down

Turn radio volume down

Speaker wires short

Separate speaker wires and insulate

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