Gravity GTX800.2D - Receiver Crunch - Free user manual and instructions

USER MANUAL Gravity GTX800.2D Crunch

High level inputs with EPS*

• Attach the device to a suitable mounting location in the vehicle by using screws. Make sure that the device cannot vibrate while driving and that it is screwed tightly.

• During installation, make sure that no parts that are standard in the vehicle, such as cables, on-board com- puters, seat belts, tank or similar parts, are damaged or removed.

• Make sure that the device receives sufcient cooling at the installation location. Do not mount the device in closed housings that are too small without air circulation or near heat-radiating parts or electronic controls of the vehicle.

• All cables should be kept as short as possible to avoid losses and interference.

• Protect the device from moisture, dust and dirt.

• Make sure that the input/output cables are far enough away from the power supply cables, otherwise interfer- ence may occur.

• The performance and reliability of the sound system depends on the quality of the installation. It is best to have the installation carried out by an installation specialist.

1 x 2-channel amplier 1 x Bass level remote controller including connection cable 1 x Cable harness with 4-pin plug (high level inputs with EPS) 1 x Cable harness with 4-pin plug (low level inputs with RCA jacks) 1 x Fuse (external) 1 x Owner‘s manual DISPOSAL/RECYCLING If you have to dispose the device and its components, please note that no electronic devices must be disposed in the household waste. Dispose of the device and its components at a suitable recy- cling facility in accordance with local waste regulations. If necessary, consult your local authority or dealer. More information at www.audiodesign.de/english/disposal INTENDED USE This product is designed to operate in a vehicle with an on-board voltage of +12 V with negative ground. The device functions as an audio amplier that is used within a vehicle sound system. If you have any questions about product safety, please contact: [e-mail] Please read these operating instructions completely before starting the installation and putting the device into operation. Before you start with the installation, disconnect the ground (–) terminal of the vehicle battery to avoid short circuits and damage. CAUTION CAUTION13

The low level inputs on LINE INPUT (Fig. 1.2) are suitable for connecting RCA cables if your car radio owns RCA preamplier outputs. Then connect the RCA sockets of the included low level cable connector to the RCA cables from the car radio. To activate the low level inputs, press the INPUT LEVEL button (Fig. 1.4) to LOW. LOUDSPEAKER CONNECTION

• In 2-channel operation, which means one loudspeaker per loudspeaker output, the impedance should not fall below 2 Ω per loudspeaker.

• In bridged mode, which means two loudspeaker outputs are connected together, the minimum impedance doubles to 4 Ω per bridged output. CAUTION: If the amplier is operated with speaker impedances that are too low, it could be overloaded and thus permanently damaged. AUTO TURN-ON If there is no turn-on cable from the car radio available, you must use the automatic turn-on function. To do this, press the button AUTO TURN-ON (Fig. 5.3) to ON. The connection for the REM turn-on cable (Fig. 2.2) does not need to be occupied in this case. CAUTION: The automatic turn-on function only works in conjunction with the high level inputs on LINE LEVEL INPUT (Fig. 5.1). This function may not be able to be used with older car radios.

The high level inputs on LINE INPUT (Fig. 5.1) are suitable for connecting speaker cables if your car radio does not have RCA preamplier outputs. To do this, extend the corresponding speaker cables of the car radio with high-quality speaker cables to the installation location of the amplier. Then connect the appropriate speaker cables to the open cable ends of the included high level cable connector. To activate the high level inputs, press the INPUT LEVEL button (Fig. 5.2) to HIGH.

POWER SUPPLY AND TURN-ON-CONNECTION

To connect the power supply, only use power cables that are sufciently dimensioned (See page 43, Fig. 6). The cross-section of the cables must be the same size for +12V and ground. First establish a connection between the GND terminal of the amplier and a suitable ground point on the ve- hicle body (Fig. 2.3). To guarantee a good connection, remove any dirt or rust from the ground point. Then connect the +12V terminal of the amplier to the positive terminal of the vehicle battery (Fig. 2.1). The enclosed fuse with fuse holder must be installed in this positive power cable (Fig. 2.4). For safety reasons, the cable length from the +12V connection to the fuse must be less than 30 cm. In addition, the positive power cable must be protected with another fuse near the battery (Fig. 2.5). This fuse is not included in the scope of delivery and should have the same fuse value as the enclosed fuse. For safety reasons, the cable length from the positive terminal of the battery to the fuse must be less than 30 cm. Then connect the turn-on-wire from the car radio with the amplier‘s REM terminal (Fig. 2.2). A cable with a cross-section of 0.5 mm

is adequate.14 INPUT SENSITIVITY Turn the INPUT GAIN controller (Fig. 1.5) counterclockwise to the MIN position. Then turn the volume control on the car radio to 80% – 90% of the maximum volume. Now slowly turn the INPUT GAIN controller (Fig. 1.5) clockwise until you hear slight distortion from the speakers. Then turn back the INPUT GAIN controller (Fig. 1.5) a little until you can no longer hear any distortion.

If the amplier is to be used for mid-range/tweeter loudspeakers, set the switch X-OVER MODE (Fig. 1.8) to HP. Then set the desired crossover frequency on the HIGH PASS controller (Fig. 1.6). Thus to that only the frequencies above the chosen crossover frequency will be amplied. This effectively minimizes distortions and overloads at lower frequencies. A good point to start is at 125 Hz. If you use big loudspeakers (>20 cm) set X-OVER MODE (Fig. 1.8) to FULL. In this case, the HIGH PASS controller (Fig. 1.6) is without function. BASS BOOST Use the BASS BOOST controller (Fig. 1.9) to adjust the bass boost between 0 – 12 dB. Use this controller carefully and avoid distorted playback.

If the amplier is to be used with a subwoofer, set the switch X-OVER MODE (Fig. 1.6) to LP/BP. Set the desired crossover frequency by using the controller LOW PASS (Fig. 1.7). Thus to that only the frequencies below the chosen crossover frequency will be amplied and the subwoofer plays more precise and efcient. In LP/BP mode, the controller HIGH PASS (Fig. 1.6) can also be used to limit the frequency response down- wards, for example to produce a bandpass/subsonic signal. CAUTION: If the controller HIGH PASS (Fig. 1.6) is set higher than the controller LOW PASS (Fig. 1.7), no audio signal is heard.

With the included remote, the bass level can be adjusted e.g. from the driver’s seat. Connect the remote at the BASS LEVEL REMOTE terminal (Fig. 1.10) with the included cable. The remote should only be used when operating the amplier in LP/BP mode with a subwoofer. STATUS LED The POWER/PROTECT LED (Fig. 1.1) lights up green, when the amplier is in operation. The POWER/PROTECT LED (Fig. 1.1) lights up red, when the device is overheated or an error has occurred. After cooling down, the device should work again. If the error persists, please note the information in the sec- tion TROUBLESHOOTING.15 FIGURES (P. 40-43) CONNECTIONS AND CONTROLLERS (FIG. 1) (1) Status LED (2) Audio signal inputs (3) Push button for the automatic turn-on function (4) Push button for the input type (high level / low level) (5) Rotary controller for input sensitivity (6) Rotary controller for high pass / bandpass lter (7) Rotary controller for low pass / bandpass lter (8) Crossover selector switch (9) Rotary controller for bass boost (10) Terminal for the included bass level remote controller POWER SUPPLY AND TURN-ON CONNECTION (FIG. 2) (1) +12 V terminal for the positive connection from the vehicle battery (2) REM terminal for the turn-on signal from the car radio (3) GND terminal for the ground connection (4) External cable fuse for amplier (included in the scope of delivery) (5) External cable fuse for +12V power wire (not included in the scope of delivery) 2-CHANNEL OPERATION (FIG. 3) (1) Audio signal L/CH1 from car radio (2) Audio signal R/CH2 from car radio (3) Loudspeaker L (4) Loudspeaker R MONO OPERATION (FIG. 4) (1) Audio signal L/SUB from the car radio (2) Audio signal R/SUB from the car radio (3) Bass level remote controller (4) Subwoofer L+/R- HIGH LEVEL INPUTS (FIG. 5) Please note the information on page 43. POWER SUPPLY CABLES (FIG. 6) Please note the recommendations on page 43 for the cable length and the cable cross-section of the power cables in order to ensure an adequate and safe power supply for the amplier.16

ACTIVE OPERATED TWEETER DISTORTED OR CRACKLES

CAUTION: Tweeters will be damaged by frequencies that are too low. Please note the manufacturer’s information about which frequency setting is recommended. To be on the safe side, pause the car radio playback rst. Then check the following steps: Is the crossover switch of the relevant channel pair set correctly on the device? Set the switch to the high pass position. Is the high pass lter of the relevant channel pair on the device set too low? First turn the high pass control clockwise all the way up. Now start playback on the car radio. Then slowly turn the high-pass control counterclockwise until a clean sound can be heard from the tweeters and, together with the woofers/midrange speakers, creates a balanced sound. Also make sure that the woofers/midrange drivers are set correctly with the respective high and low pass controls. TROUBLESHOOTING

NO FUNCTION / POWER LED IS OFF

First check the fuse of the installed power cable on the vehicle battery The fuse is defective? Replace the defective fuse with one of equal value, but never with a higher value.

• The fuse fails again. In this case there appears to be a short circuit between the fuse and the device. To do this, check the entire length of the +12V power cable from the battery to the device for damage and whether there is a short circuit to ground, e.g. a contact with the vehicle chassis or body. If necessary, replace the defective power cable. The fuse is apparently okay? Use a standard 12 volt voltmeter to check the voltage between the +12V connection and the ground connection on the device.

• There is no voltage. Use the voltmeter to check the fuse located near the vehicle battery to see if there is voltage between the output and ground. If there is no voltage there, either the fuse holder or the fuse is defective, even though it appears to be okay. If necessary, replace the fuse holder or fuse.

• There is voltage. If you operate the device with a turn-on cable (REM) from the car radio to the REM connection of the device, the AUTO TURN-ON switch must be in OFF position. A turn-on cable (REM) is connected to the REM connection of the device. Use the voltmeter to check whether there is voltage between the device’s REM terminal and ground. The car radio must be switched on. There is no voltage.

• Check the turn-on cable from the device to the car radio for a short circuit or damage. If necessary, replace the turn-on cable. There is voltage.

• The device is probably malfunctioning or defective. Contact your specialist dealer. If you operate the device with the speaker signals (high level mode), the AUTO TURN-ON switch must be switched to ON.

• The AUTO TURN-ON switch is in the ON position, but the device remains off. Check the speaker cables from the car radio to the device for short circuits or damage. If necessary, replace the speaker wires or insulate the damaged area.

Check the following steps: Short circuit on the speaker cables First disconnect all speaker cables from the amplier. Use a multimeter to check the ohmic impedance of each loudspeaker by measuring between its plus and minus lines. With standard loudspeakers the value uctuates between 3 and 5 ohms. The values for low-resistance subwoofers can be lower.

• The measurement shows a resistance value of less than 0.5 Ohms Then there is a short circuit. Remove the cables of the affected loudspeaker at its connections. Now use the multimeter to check the ohmic impedance directly at the loudspeaker connec- tions by measuring between the plus and minus connections. The measurement shows a resistance value of more than 0.5 Ohms

• The speaker is ne, so the speaker cables appears to be defective and causing a short circuit. Replace the defective speaker cable. The measurement shows a resistance value of less than 0.5 Ohms

• The speaker appears to be defective and causes an short circuit. Replace the defective speaker. The load impedance of the loudspeakers or the subwoofer is too low Compare the ohmic impedance of the connected loudspeaker or subwoofer with the technical specications of the amplier. For example, if the amplier is only designed for 2 or 4 ohm opera- tion, no loudspeaker with less than 2 ohms may be connected. The cross-section of the power cables is too small If the cable cross-section is too small, this leads to an increased ohmic resistance and thus to a voltage drop (voltage loss). This indicates that the amplier consumes more power. The increased power consumption results in a signicantly higher heat development and the amplier switches to thermal protection mode. If necessary, lay power cables with a larger cable cross-section. The amplier is overheated Every amplier requires sufcient air circulation to be able to dissipate the heat generated during operation. If necessary, change the installation position in favor of better cooling of the amplier or ensure better air circulation at the installation location. Turn off the sound system and wait about half an hour for the amplier to cool down again. With very hot outside temperatures and strong sunlight, enormous heat develops inside the vehicle. The amplier then activates its thermal protection circuit to prevent damage. After cooling down, the amplier works properly again.loading-circle-118 CARACTÉRISTIQUES 10 ~ 90% -25 ~ 50°C