GROUND ZERO GZFA 1.550 FERRUM SERIES Mono Amplifier Owner’s Manual

GROUND ZERO GZFA 1.550 FERRUM SERIES Mono Amplifier

Product Information

Features:

• High pass filter (Subsonic)
• Frequency range
• Signal-to-Noise ratio (SNR)
• Overall distortion (THD+N)
• Input sensitivity
• Recommended speaker wiring
• Recommended power wiring
• Fuse(s)
• Dimensions (W x H x L)

Settings and Functions:

1. Loudspeaker terminal
2. Power terminal
3. Fuse(s)
4. High-level input
5. Line output (RCA)
6. Line input (RCA)
7. Sensitivity control
8. Low pass filter
9. High pass filter (Subsonic-Filter)
10. Phase switch
11. Bass Boost control
12. Remote socket
13. Status indication

Technical Specifications:

• Model
• Hochpass-Filter (Subsonic) / High pass filter
• Frequenzgang / Frequency range
• Signal-Rausch-Abstand / Signal-to-Noise ratio (SNR)
• Gesamte Verzerrungen / Overall distortion (THD+N)
• Eingangsempfindlichkeit / Input sensitivity
• Empf. Lautsprecherkabel / Recommended speaker wiring
• Empf. Stromkabel / Recommended power wiring
• Sicherung(en) / Fuse(s)
• Abmessungen (B x H x L) / Dimensions (W x H x L)

Mounting Instructions:

Connect the loudspeaker wires with a minimum load of 1 ohm to the speaker terminal. Connect the power terminal to the positive terminal of the battery for constant power supply or to the remote output of the head unit for remote control. Connect the mass terminal to the negative terminal of the battery. If using high-level input, the remote input of the power supply terminal remains unused.

Usage Instructions:

1. Connect the loudspeaker wires with a minimum load of 1 ohm to the speaker terminal.
2. Connect the power terminal to the positive terminal of thebattery for constant power supply or to the remote output of the head unit for remote control. Do not connect to both at the same\ time.
3. Connect the mass terminal to the negative terminal of the battery.
4. If using high-level input, connect the speaker output of the head unit directly to the high-level input. The amplifier will turn on automatically with auto-on feature.
5. If using RCA pre-amplifier output signal, connect RCA cables to the line input (RCA).
6. Adjust input sensitivity using the sensitivity control.
7. Adjust required crossover point using low pass filter and high pass filter (Subsonic-Filter).
8. Use the phase switch to adjust the phase of the audio signal.
9. Adjust bass boost using the bass boost control with a range of 0 to +12 dB.
10. If required, connect the wired remote control (GZCS REMOTE) to the remote socket.
11. Check status indication for correct operation (POWER: green) or error (PROTECT: red).
12. Use output sockets to offer full range audio signal for a further amplifier.

Note: A defective (blown) fuse needs to be replaced by a fuse with identical value and quality. High-level and RCA inputs should never be used simultaneously as it may cause serious damage to the amplifier.

Features

• High-quality mono class D amplifier
• 1 ohm stable
• Variable low pass & high pass filter
• Adjustable bass boost function
• Phase switch
• High-level input with auto-on function
• Adjustable input sensitivity
• Turn-on delay & thermal protection circuit
• Wired-level remote control

General mounting instructions

• As a precaution, it is recommended to disconnect the vehicle’s battery before mounting the amplifier.
  Note : For new vehicles, disconnecting the battery might cause various errors in your vehicle´s electric system that can be cleared only by authorized service partners of your vehicle´s manufacturer! Please ask your service partner first before disconnecting the battery!

• The power supply wire (+12 V) has to be protected within max. 20 cm / 8” by a main fuse holder with a fuse value matching the recommendation for your amplifier
  Note : If there is more than one amplifier connected using this power wire, the main fuse value must be equal to the sum of the recommended fuses of all connected devices. However, make sure the diameter of your power wire will be enough for the required current!

• If necessary, replace a defective fuse by a fuse with identical quality and value

• Never drill holes to the vehicle´s gas tank, brake lines, to wirings or any other important vehicle parts!

• Never pass wires over sharp edges or vehicle parts due avoid any kind of damage

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

• Lay the power supply wiring always separated from speaker wiring to avoid disturbance

• The amplifier contains a temperature protection circuit that turns the device off in case of overheating. After a certain cooling time, it will turn on automatically. To avoid heat build-up, enough air supply for cooling must be provided. Never cover the surface of the amplifier´s heatsink entirely

• The amplifier should NEVER be mounted onto a vibrating part or surface such as a subwoofer enclosure. This might lead to malfunction due to loosened electrical parts inside the amplifier.

• Some amplifiers offer a high-level input option, however if a pre-amplified output (RCA) is available (at the head unit), it is strongly recommended to make use of them.

• Connections of RCA wires and loudspeaker cables as well as switching of any switches must be done while the amplifier is turned off

Specifications

Output power (RMS)

@ 4 Ω CEA Standard CEA-2006-A (@ 100 Hz)

| 185 W (1% THD+N)
Output power (RMS)

@ 2 Ω CEA Standard CEA-2006-A (@ 100 Hz)

| 280 W (1% THD+N)
Output power (RMS)

1 Ω CEA Standard CEA-2006-A (@ 100 Hz)

| 350 W (1% THD+N)
Max. Output power

1 Ω CEA Standard CEA-2006-A (@ 100 Hz)

| 550 W (10% THD+N)
Low pass filter| 40 Hz – 250 Hz (12 dB/oct)
High pass filter| 15 Hz – 50 Hz (12 dB/oct)
Frequency range| 15 Hz – 250 Hz
Signal-to-Noise ratio (SNR)| > 90 dB
Overall distortion (THD+N)| < 0.3%
Damping factor| > 100
Input sensitivity| 200 mV – 4 V
Recommeded speaker wiring| ≥ 2.5 mm² / 14 AWG
Recommended power wiring| ≥ 20 mm² / 4 AWG
Fuse(s)| 2x 30A
Dimensions (W x H x L)| 180 x 53 x 277

7.09” x 2.09” x 10.91”

Controls & Features

2

|

Power terminal

| +12V        To be connected to the positive terminal of the battery REM To be connected to the remote output of the head unit*

(*not required in high-level mode)

GND       To be connected to the vehicle´s ground

(or directly to the negative terminal of the battery)

3

|

Fuse(s)

| Recommendation: A defective (blown) fuse needs to be replaced by a fuse with identical value and quality

4

|

High-level input

| Head units without RCA pre-amplifier output signal, can be connected using the high-level input to connect the speaker output of the head unit directly. If used, the amplifier turns on automatically (auto-on feature).The remote input of the power supply terminal remains unused

Important note: High-level and RCA inputs should never be used simultaneously! This may cause serious damage to the amplifier

5| Line output (RCA)| Output sockets offering full range audio signal for a further amplifier

6

|

Line input (RCA)

| Input sockets to connect RCA signal wires

Important note: High-level and RCA inputs should never be used simultaneously! This may cause serious damage to the amplifier

7| Sensitivity control| Controller to adjust the input sensitivity

8

|

Low pass filter

| To adjust the required crossover point. Frequencies above the selected crossover point will be filtered (40 Hz to 250 Hz)

9

|

High pass filter

| To adjust the required crossover point. Frequencies below the selected crossover point will be filtered (15 Hz to 50 Hz)

10

|

Phase switch

| This switch can be used to reverse the phase of the audio signal (0° / 180°) in order to adapt the connected subwoofer to the other loudspeakers, if necessary
11| Bass Boost control| To adjust the bass boost level ( 0 to +12 dB @ 45 Hz)
12| Remote socket| To connect the wired remote control (GZCS REMOTE)
13| Status indication| POWER (green) ok (correct operation) PROTECT (red) error (protection mode)

Troubleshooting guide

No audible sound

|

Does the POW LED turn to green?

| Check protection fuse(s) of the amplifier (harness) Check remote wire connection (RCA input mode)

Check +12 Volt power supply wire connection Check the ground wire connection

Did the PROTECT LED turn to red?| Check for speaker short or amplifier overheating
Device does not turn on| The power supply of the amplifier?| Check power wire or connections
Remote wire powered? (RCA input mode)| Check the remote wire connection to the head unit
No sound on one channel| Is speaker wiring undamaged?| Check for short circuits or open connections
Input signal on each RCA lead?| Reverse left and right RCA inputs to check the audio input signal
The 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 unit´s volume / wait for cooling
Speaker wires short / speaker damaged| Check speaker/wires and insulate if necessary

Terms of warranty

The limited warranty for this product is covered by GROUND ZERO´s regional distribution partners and their terms and conditions. For further information contact your local retailer or distributor.

Impedance calculation

Safety instruction / Manufacturer´s declaration

• Safety Instructions : Do not expose the device to extreme temperatures, fire, high humidity or direct contact with liquids. Do not use the device if it has been damaged or exposed to liquids. Keep the device, packaging and accessories away from children and pets to prevent accidents and suffocation.
• Manufacturer‘s declaration: Herewith Ground Zero GmbH declares that this product complies with the directive 2014/30/EU (EMC) and further declares that this product is in conformity with the rules of the EU directives (including all applicable amendments) 2011/65/EU RoHS2 and 2001/95/EC General Product Safety directive. The full text of the Declaration of Conformity (EU) is available at the following internet address: www.ground-zero-audio.com. Electronic products contain valuable raw materials and must not be disposed of with normal household waste. At the end of its service life, please bring the device to your local recycling facility.

Respect the Music

Listening to music can be emotional, impressive, relaxing or enjoyable. At that, it doesn´t really matter what kind of music is the personal favorite, whether it´s Instrumental, Jazz, Electro, Latin, Classic, Rock or any other music direction. However, audio reproduction quality at each desired volume is elementary. Some music styles require higher levels while others prefer the soft tones. GROUND ZERO considers all the different wishes of customers during the development of new products. Along with this, the target is to create the most realistic sound, to transfer the soul of the music and the intention of the performer. Summarized to one phrase: RESPECT THE MUSIC!

GROUND ZERO products are engineered in Germany
GROUND ZERO – international sponsor
Ground Zero GmbH Erlenweg 25, 85658 Egmating, Germany
Tel. +49 (0)8095/873 830 Fax -8310
www.ground-zero-audio.com

References

• Ground Zero Audio – Car Audio Products

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