COMPETITION SERIES
Amplifier
Owner’s Manual
GZCA 1.5SPL-M1
GZCA 1.5SPL-M2
Features
- 1-ohm (model M1) / 2-ohms (model M2) stable full range amplifier
- High efficient class D technology
- Power status, clipping and protection LED
- Up to 12 dB adjustable bass boost (@ 35 to 70 Hz)
- Adjustable high-pass filter
- Adjustable low-pass filter
- 1x Mono RCA input
- 1x Mono RCA output
- Adjustable input sensitivity
- Thermal / short circuit/overload protection
Table of contents
| Recommended wiring and fuse value | 3 |
| General installation notes | 4 |
| Controls and features / Connections | 5 |
| Wiring | 6 |
| Specifications | 7 |
| Troubleshooting guide | 8 |
| Terms of warranty | 8 |
Recommended wiring and fuse value
| Model | GZCA 1.5SPL-M1 / -M2 |
| Speaker wire | min 2.5 mm2/ 13 AWG |
| Power supply wire | min 25.0 mm2 / 4 AWG |
| Remote wire | min 0.75 mm2/ 20 AWG |
| Recommended fuse value for music reproduction | 80 A |
General installation notes
- 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 the 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 sufficient for the required current!) - If necessary, replace a defective fuse by a fuse with identical quality and value
- Never drill a hole to the vehicle’s gas tank or 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, a sufficient 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 loose 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.
WARNING!
Powerful car audio systems are capable to create an extremely high SPL level comparable to live concert levels.
Permanent exposure to excessively high sound levels may cause damage to or loss of hearing.
Furthermore, the 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 and features – GZCA 1.5SPL-M1/M2
| 1 | RCA signal input | To connect the RCA signal wire* from the audio source/head unit |
| 2 | RCA signal output | To connect another amplifier (using an RCA cable) |
| 3 | Input sensitivity (LEVEL) | To adjust the input sensitivity |
| 4 | LP crossover switch | To select the operation mode of the LP crossover |
| 5 | Low pass filter | To adjust the low pass filter’s crossover point (80 Hz – 25 kHz) |
| 6 | High pass filter | To adjust the high pass filter’s crossover point (5 Hz – 80 Hz) |
| 7 | Bass boost level | To adjust the bass boost level (0 tol 2 dB) |
| 8 | Bass boost frequency | To adjust the bass boost’s center frequency (35 — 70 Hz) |
| 9 | Power status, clipping and protection LED | Indicating the power and clipping status and activated protection mode |
* to avoid any kind of malfunction, it is strongly recommended to use high-quality RCA wires!
Connections – GZCA 1.5SPL-M1/M2
| 1 | Power terminal | BAT To be connected to the positive terminal of the battery (+12 V) REM To be connected to the remote output of the head unit GND To be connected to the ground of the vehicle |
| 2 | Speaker wire terminal | To be connected to one or more speakers (pay attention to the minimum load mentioned for your amplifier model) GZCA 1.5SPL-M1 Minimum load at terminal 1 ohm GZCA 1.5SPL-M2 Minimum load at terminal 2 ohm |
Wiring – GZCA 1.5SPL-M1/M2
Specifications
| Model | GZCA 1.5SPL-M1 | GZCA 1.5SPL-M2 |
| Amplifier type | 1 ohm stable mono full range doss D amplifier | 2 ohms stable mono full range class D amplifier |
| RMS Power measured @ 14.4 V | 1 x 825 W@ 2 ohms | I x 825 W ci) 4 ohms |
| RMS Power measured g 14.4 V | lx 1500 W @ 1 ohm | lx 1500 W@ 2 ohms |
| RMS Power measured g 12.6 V | lx 1200 W @ 1 ohm | lx 1200 W@ 2 ohms |
| S/N ratio | 99 dB (nominal power) | |
| THD+N | 0.1 % (p nominal power / 100 Hz) | |
| Damping factor | >1000 (@100 Hz / nominal power) | |
| Low pass filter * | 50 Hz – 500 Hz | |
| High pass filter * | 5 Hz – 80 Hz | |
| Frequency response | 10 Hz – 20 kHz (± 3 dB) | |
| Input sensitivity | 500 mV – 8 V | |
| Operation voltage | 9 V – 16 V | |
| Fuse | 80 A / available separately | |
| Dimensions wxhxl (mm) | 184 x55 x210 | |
| Dimensions w x h x l (inch) | 7.2 x 2.1 x 8.3 | |
| Weight | 1.5 kg / 3.3 lbs | |
| Recommended battery current | min 80 A / ideally 160 A | |
Troubleshooting guide
| Symptoms | Check / Cause | Action |
| No audible sound | Does the power LED turn on? No? Probably there is no power supply | Check the power line fuse(s) Check remote wire connection to the head unit Check +12 Volt power supply wire connection Check ground wire connection |
| There might be no audio input signal | Check the RCA wiring to the head unit | |
| Speaker wires might be interrupted | Check the speaker wiring | |
| The device does not turn on | Does the power LED turn on? No? Probably there is no power supply | Check the power line fuse(s) Check remote wire connection to the head unit Check +12 Volt power supply wire connection Check ground wire connection |
| Distorted audio signal | Input level (gain) might be set too high | Decrease the amplifier level (level control) or Decrease the volume level of the head unit |
| The amplifier is working, but… | Does the power LED blink frequently? Yes? battery voltage might be low The battery | Check and load the battery |
Side panels
Both side panels can be detached for wiring purposes. First, lift the side panel upwards. Subsequently, pull it away from the heat sink attachment. The installation has to be done in reverse order.
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
Ground Zero Audio – Car Audio Products
