Ground Zero IRIDIUM SERIES User manual

IRIDIUM-SERIES

AMPLIFIER

OWNER’S MANUAL

GZIA 1.1450DX-II

Features

•High efficient class D amplifier

•1 Ohm stable mono

•High-level input with Auto-On

•Up to 12 dB adjustable bass boost (@45 Hz)

•Phase shift switch (0°/180°)

•Adjustable input sensitivity

•Bass remote control

•Thermal / short circuit / overload protection

Recommended wiring

GZIA 1.1450DX-II

Speaker wires

min 2.5 mm² / 13 AWG

Power supply wires

min 25.0 mm² / 3 AWG

High-level input wires

min 1.00 mm² / 18 AWG

Remote wire

min 0.75 mm² / 20 AWG

Mounting instructions

•As a precaution, it is recommended to disconnect the vehicles battery before mounting (also note the vehicles manual!)

•The power supply wire (+12 V) has to be protected within max. 20 cm / 8” by a main fuse holder with matching fuse value

(Main fuse value has to be equal to the sum of values of the fuses of each connected device)

•If necessary, replace a defective fuse with the identical value only

•Never drill a hole to the vehicles gas tank or brake lines, to wirings or any other important vehicle part!

•Never pass wires over sharp edges or vehicle parts

•Keep the wiring away from the antenna and electronic devices contributing to radio reception

•Lay the power supply wiring always separated from speaker wiring

•The amplifier contains a temperature protection circuit that turns the device off in case of overheating. After a cooling time,

it will turn on again automatically. To avoid heat buildup, sufficient air supply for cooling must be provided. Never cover the

surface of the heatsink entirely.

•The amplifier should not be mounted on a strongly vibrating part or surface (e.g. subwoofer enclosure)

•If a pre-amplified output (RCA) is available ( at the head unit), it is recommended to make use of them

WARNING !

Powerful car audio systems are able to create extremely high SPL similar to real live concert levels. Permanent exposure to excessively high

sound levels may cause damage to or loss of the hearing.

Furthermore, operation of a motor vehicle while listening to audio equipment at high volume levels may impair your ability to concentrate

on road traffic and external sounds such as horns, warning signals or emergency vehicles. In the interest of general and own safety, it is

recommended to listen to music at appropriately low volume levels while driving.

Controls & Features – GZIA 1.1450DX-II

Controls & Features GZIA 1.1450DX-II

SPEAKER terminal

Speaker connection

POWER supply terminal

GND

-> ground terminal

REM -> remote wire / not to be used with high-level input (8)

BATT+

-> +12 Volt wire from battery terminal

Status LEDs

POW -> green

-> ok (correct operation)

PROT

-> red -> error / protection

INPUT (RCA input)

Input sockets to connect RCA wires - to avoid any malfunction, it is recommended to use

only high quality RCA cables

Cable recommendation: GCZZ X-TP series (available lengths 0.57 / 1.14 / 3.14 / 5.49 m)

IMPORTANT:

High-level and RCA inputs should

never

be used simultaneously! This may cause serious

damage to the amplifier.

GAIN control

Controller to adjust the input sensitivity

BASS BOOST control

Controller to adjust the bass boost level ( 0 to +12 dB at 45 Hz)

LOW-PASS (LPF) control

To adjust the required crossover point. Frequencies above the selected crossover point will

be filtered (30 Hz to 250 Hz)

HIGH LEVEL input

Instead of using the RCA input (4), the high-level input can be used. To connect the speaker

output of the head unit directly. If used, the amplifier turns on automatically (Auto-On)

The REM (remote) input of the power supply terminal remains unused

IMPORTANT:

High-level input and RCA inputs should

never

be used simultaneously; this may cause

serious damage to the amplifier

REMOTE socket

To connect the bass remote control

PHASE CONTROL switch

To select the phase (0° / 180°) of the connected subwoofer in relation to further speakers

(e.g. front speakers)

RCA input wiring – GZIA 1.1450DX-II

Highlevel input wiring – GZIA 1.1450DX-II

Specifications

Model

GZIA 1.1450DX-II

Amplifier type

Mono class D

RMS Power @ 4

Ω

CEA Standard CEA-2006-A

400 W (1% THD+N)

Max Power @ 4

Ω

500 W (10% THD+N)

RMS Power @ 2 Ω

CEA Standard CEA-2006-A

750 W (1% THD+N)

Max Power @ 2

Ω

850 W (10% THD+N)

RMS Power @ 1

Ω

CEA Standard CEA-2006-A

1250 W (1% THD+N)

Max Power

1450 W (10% THD+N)

Damping factor

> 100

Low pass filter

30 Hz – 250 Hz (12 dB/Oct)

Bass boost

0 ~ +12 dB (45 Hz)

Frequency response

10 Hz – 250 Hz

(± 1 dB)

Input sensitivity

200 mV – 6 V

(± 5%)

Bass remote



Fuse(s)

3x 40A

Dimensions

w x h x l (mm)

192 x 49 x 360

Dimensions

w x h x l (inch)

7.56 x 1.93 x 14.17

Trouble shooting guide

Terms of warranty

The limited warranty for this product is covered by Ground Zero´s local distribution partners and their

terms and conditions. For further information contact your local retailer or distributor.

Ground Zero GmbH

Erlenweg 25, 85658 Egmating, Germany

Tel. +49 (0)8095/873 830 Fax -8310

www.ground-zero-audio.com

Symptoms

Check / Cause

Action

No audible sound Does the POW LED turn to green?

Check protection fuse(s) of the amplifier

Check remote wire connection (RCA input mode)

Check +12 Volt power supply wire connection

Check ground wire connection

Did the PRO LED turned to red?

Check for speaker short or amplifier overheating

Device does not turn on

Power supply of the amplifier?

Check power wire or connections

Remote wire powered? (RCA input mode)

Check remote wire connection to the head unit

No sound on one channel

Speaker wiring undamaged?

Check for short circuit or open connections

Input signal on both RCA leads?

Reverse left and right RCA inputs to check the

audio input signal

Device turns off at medium /

high volume

Load impedance of each speaker correct?

Check if each speaker load impedance matches

the technical specifications of the amplifier

Status LED turned on red

Temperature protection circuit active

Decrease head units volume / wait for cooling

Speaker wires short / speaker damaged

Check speaker / wires and insulate if necessary

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