GZUA 2250DX - Car stereo Ground Zero - Free user manual and instructions

USER MANUAL GZUA 2250DX Ground Zero

Limited warranty - defective products must be returned in original packaging - please add a copy of the original purchasing invoice showing the purchasing date and a detailed description of the failure. Failure caused by overload, misuse or by using the product for competition purpose are not covered by the warranty.

wwwground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.

Please read before Installation

Thank you for selecting a GROUND ZERO amplifier. We are providing a helpful hints

list which should keep you from experiencing unnecessary shut down.

Features

Efficiency 80% (4 Ohm at 1KHz)
- Ultra small sized heatsink
- 2 Ohm stable stereo (bridged 4 Ohm)
MOS-FET PWM power supply
- Adjustable lowpass filter
18 dB / Octave crossover slope
- Multi way protection circuitry

(Thermal / over current / speaker short / Speaker DC protection)

Adjustable highpass filter (GZUA 2250DX / 4135DX)
Adjustable phase shift (GZUA 2250DX / 5600DX)
Adjustable subsonic filter (GZUA 2250DX / 5600DX)
Adjustable bass boost (GZUA 2250DX)
RCA Cinch output (mono) for other subwoofer amplifiers (GZUA 2250DX)
Adjustable crossover frequency FULL/LPF/HPF switch (GZUA 5600DX)
Input mode switch (GZUA 5600DX)
Bass remote control (GZUA 5600DX)

Introduction

Amplifiers provide high-performance sound reinforcement for your mobile audio equipment. It's versatility enables compatibility with optional Equalizer, Frequency Dividing Network Crossovers and other audio processors in a customized system.

The Multi-Mode bridging capabilities allow flexibility in hosting several different speaker configurations.

To achieve optimum performance, it is highly recommend that you read this Owners manual before the installation.

Tools and materials you need

Screwdriver
Electric drill, 3mm
- Mounting screws
Power wire min. 20mm²
Ground wire min 20mm²
- Speaker wire min. 2 × 1.5 ~mm^2

Attention

• 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!).
• Do not drill holes into the tank, the brake pipe, wires or other important parts of the vehicle.
• Never pass wires over sharp angles. It is recommended to buffer the power supply of the amplifier with an capacitor min. I Farad.

WARNING

High powered audio systems in a vehicle are capable of generating „Live Concert" high 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 sound 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:

a. If you plan to expand your system by adding other components sometime in the future, ensure an equate space is left, and cooling requirements are met.
b. If your radio source is equipped with Pre-Amp outputs, it is recommended to utilize them to drive the amplifier.
c. Are your components matched? The peak power rating of your speakers must be greater than the Amplifiers. They also must be 2-8 ohms impedance (This information is normally printed on the speaker magnet.)
d. Consider both the length of your leads, and routing when choosing the mounting location. Pre-Amp input jacks require a length of high quality shielded male to male RCA patch cord.

Mounting your amplifier

a) Select a suitable location that is convenient for mounting, accessible for wiring and has enough room for air circulation and cooling.
b) Use the amplifier as a template to mark the mounting holes, remove the amplifier and drill 4 holes, use extreme caution. Inspect underneath surface before drilling.

Warning

Investigate the layout of you automobile thoroughly before drilling or cutting any holes. Take care when you work near the thanks, lines, or hydraulic lines, and electrical wiring. Don't mount this system so that wire connections are unprotected or are subject to pinching or damage from nearby objects.

The +12 Volt DC power wire must be fused at the battery positive terminal connection. Before making or breaking power connections at this system power terminals, disconnect the +12 Volt wire at the battery end.

Confirm your radio / cassette player and / or other equip, mount is turned off while connecting the input jacks and speaker terminals.

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.

Wiring connection

Attention! - min. 20mm^2 wires are necessary for power connection!

(1) Ground: Ground connection should be passed directly to the car body as short as possible (max. 1m)
(2) +12 Volt: Power connection should be passed directly to the battery. Please pay attention on a correct fuse protection of the installation with an Inline device with a max. wire length to the battery of 30cm .
(3) Remote turn on: This connection is getting connected with the remote control line of the radio. It is used for turning on and off the amplifier.

Power connection

RCA connection

This amplifier has a signal input terminal of RCA connector type for low level inputs. Adjustment of input levels is accomplished by the gain control of both channels. Adjusting this control allows the amplifier gain to be controlled to match and balance both channels. The RCA input connector should be used when connecting the radio/cassette line out and this connection is usually made using RCA-RCA connector wires.

RCA connection

GZUR5600DXFrent

INPUT MODE SELECT SWITCH

If it's placed to CII3/4(

you can drive sub-woofer channel (Ch5)

from CH1/2/3/4 RCA input only.

HEAD UNIT

must be connected to CH5A & CH5B.

jack to operate Ch5.

This amplifier has a signal input terminal of RCA connector type for low level inputs. Adjustment of input levels is accomplished by the gain control of both channels. Adjusting this control allows the amplifier gain to be controlled to match and balance both channels. The RCA input connector should be used when connecting the radio/cassette line out and this connection is usually made using RCA-RA connector wires.

Speaker connection

GZUA 22500X Rear

1 Channel Bridged

2 Channel Stereo

3 Channel Tri Mode

Speaker connection

GZUR41350X Rear

Speaker connection

GZUR5600DX Rear

Bridge Mode

Speaker connection

GZUR5600DX Rear

Dual Tri Mode

Adjusting the audio level

For the best performance, you must set LEVEL (MIN:MAX) on the side of the amplifier to adjust the level of the audio signals.

Use a screwdriver to turn LEVEL(MIN/MAX) fully to MIN
2. Turn the auto sound system's volume control to about two-third of its full range.
3. Adjust LEVEL(MIN/MAX) to a comfortable listening level
4. Turn up the auto sound system's volume control until the sound begins to distort. Then immediately turn the volume down to a point just before where the distortion began. Caution: Never turn up the auto sound system's volume control more than needed to adjust the audio level, more than two thirds of its maximum volume.
5. Adjust LEVEL (MIN/MAX) until the sound is at the maximum level you want the amplifier two produce.
6. Adjust the auto sound system's volume control to a comfortable listening level.

Trouble shooting

This power amplifier has protection features to prevent any damages from misuse or faulty conditions. If the unit senses excessive heat, short circuited speakers or overload, the protection indicators will light, and the system will be turned off. In order to check the accused problems, you should turn all levels down and all power off and turn off the speaker. The system will then turn on and turn off the speaker. Now, when the above shows down due to excessive heat, the protection indicators will not light; simply allow time for the unit to start.

Before removing your amplifier, refer to the list below and follow the suggested procedures.

A

Problem Check points
Amplifier is not powered up	Check that there is battery power on the +12V terminal. Check that remote terminal has at least +12V DC remote connection. Check a good ground connection. Check all fuses. Check the protection LED is not lit.
Protection LED illuminates when amplifier is powered up	Check shorts on speaker wires. Remove speaker wires and reset the amplifier. If the protection LED still comes on, then the amplifier is faulty.
Fuse blowing	Check that the minimum speaker impedance is correct. Check short on power cable and vehicle chassis.
Overheating	Check that the minimum speaker impedance is correct. Check speaker shorts. Check that there is a good airflow around the amplifier.
Sound too low / Distorted sound	Check that the input level control is set to match the cutout level of the unit. Check the head unit volume. Check speaker shorts. Check that crossover frequencies have been properly set.
High hiss / engine noise in speakers	Check a good ground and for speaker shorts. Disconnect all RCA inputs from the amplifier. If hiss/voice disappears, check it with a good RCA interconnect. Then check the component driving the amplifier.

Specifications

Model GZUA 2250DX GZUA 4.135DX GZUA 5600DX
RMS power @ 2 Ω, 1% THD CEA Standard CEA-2006-A	2 x 450W 4 x 190W		4 x 150W + 1 x 330W
RMS power @ 4 Ω, 1% THD CEA Standard CEA-2006-A	2 x 290W 4 x 135W		4 x 90W + 1 x 250W
RMS power @ 4Ω Bridged 14,6 V, 1% THD	1 x 900W 2 x 380W		2 x 240W + 1 x 250W
Damping factor	> 60 > 60 > 60
Signal to noise ratio	> 90 dB > 90 dB > 90 dB
Lowpass crossover	30 Hz - 500 Hz 30 Hz - 500 Hz		30 Hz - 300 Hz [CH 5]
Highpass crossover	40 Hz - 3 KHz 10 Hz - 500 Hz ---
X-over crossover	---	---	40 Hz - 3 KHz [CH 1-4]
Subsonic Filter	10 Hz - 160 Hz ---		10 Hz - 70 Hz [CH 5]
Bass boost	0 - +9 dB --- ---
Bass boost Frequency	35 / 50 / 80 Hz --- ---
Phase shift	0 - 180° --- 0 - 180° (CH 5)
Frequency response	10 Hz - 30 KHz (± 1 dBi)	10 Hz - 30 KHz (± 1 dBi)	10 Hz - 30 KHz (± 1 dBi)
Efficiency @ 4 Ω	80 % 80 % 80 %
Input sensitivity	200 mV - 10 V (± 5%)	200 mV - 10 V (± 5%)	200 mV - 10 V (± 5%)
Channel separation	75 dBi 75 dBi 75 dBi
THD	0.10 %	0.10 %	0.10 %
Fuse	2 x 25A	2 x 25A	2 x 25A (Built-in fuse)
Dimensions W x H x L mm	170 x 53 x 255	170 x 53 x 255	170 x 53 x 275
Dimensions W x H x L inch	6.09 x 2.09 x 10.43°	6.09 x 2.09 x 10.43°	6.09 x 2.09 x 10.83°

Limited warranty - defective products must be returned in original packaging - please add a copy of the original purchasing invoice showing the purchasing date and a detailed description of the failure. Failure caused by overload, misuse or by using the product for competition purpose are not covered by the warranty.

wwwground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.

Limited warranty - defective products must be returned in original packaging - please add a copy of the original purchasing invoice showing the purchasing data and a detailed description of the failure. Failure caused by overload, misuse or by using the product for competition purpose are not covered by the warranty.

www.ground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.