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Istruzioni per l'uso MTX Audio, Modello 801D

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With this setting, the Remote Gain can directly control the amplifi er playback level. 3. When the full range is selected (FR), the amplifi er is used as a full range amplifi er. CROSSOVER FREQUENCY SELECTION (FREQ) Both the high-pass and the low-pass section offer continuously adjustable crossover frequencies between 40Hz and 350Hz. Adjust the setting according to your speaker component specifi cation or to your particular preference. BASS BOOST CONTROl (BASS BOOST) Select a boost level between 0dB and +18dB @ 40Hz to enhance the your sound system. BASS BOOST is NOT free! Every 3dB of boost power. Make sure to set the fi nal gains after setting the Bass Boost to work best with your subwoofer/enclosure combination. More is NOT always better! 11 TROUBLESHOOTING 1. No power: Verify that the Ground, +BATT, and remote cables are securely attached to the amp, the connection at the + terminal of the battery is secure, the remote turn-on is securely fastened to the source unit and that the in-line fuse at the battery is good as well as the fuse on the amp. If fuses are blown, replace them and attempt to power the amp back on. If fuses continue to blow, please see an authorized dealer. To confi rm that the amp is getting power at the +BATT and remote, use a digital multi-meter set to DC voltage, attach the negative terminal of the meter to the ground and the positive to the +BATT and then check the remote. The remote and the +BATT should have 11-15 volts. If the amp has a good ground, +BATT, and remote voltage and will not power on, please visit an authorized dealer or call the technical support number listed below for further assistance. 2. Power light on, no output: Turn the audio system off (source unit and amplifi er), check output signal connections from the source unit and input signal connections at the amp. Remove speaker wires and test for open connections or shorts with a digital multi-meter set to the impedance setting. Reconnect the speaker wires and test the system. If there is still no output, visit an authorized dealer or call the technical support number listed below for further assistance. 3. Amp turns on and shuts off: Turn the audio system off (source unit and amplifi er). Remove the speaker wires and test for open connections or shorts with a digital multi-meter set to the impedance setting. With your ear close to the speaker, gently push on it. If it sounds scratchy then replace the speaker or consult an authorized dealer. Carefully touch the amp for temperature. If it is extremely hot then the amp is in thermal protection and needs to cool down. If thermal protection continues to be a problem, see an authorized dealer or call the technical support number below. 4. No sound from one side: Check the speaker connections, input connections, balance control on the source unit, and then check the speakers for shorts with the digital multi-meter. 5. Low sound from both radio and CD: Check the radio’s fader control and the amplifi er’s input sensitivity. 6. Amplifier shuts down after long play times: If the light is turned off, then the amp is probably in thermal protection due to poor ventilation er installation instructions for causes of high operating temperature). the speaker impedance to verify that it is above verify that you have more than 11 volts at the portion of the amp and that you have 4 gauge power cable and the proper fuse rating battery. 7. Amplifier shutting off and LED flashing off and on: This is an indication of low or high voltage at the +BATT or the remote portion of the amp. Test the +BATT and the remote portion of the amp with a digital multi-meter. If the voltage at either of these terminals is above 15 volts or below 11 volts, consult an automotive electrical specialist. If voltage is consistently below 11 volts, adding a StreetWires one-farad stiffening capacitor will solve the problem. 8. Whining noise that increases with acceleration: This is what is known as a ground loop. To verify if the noise is being generated by a bad ground or the RCA cables, remove the RCA cables from the amp (make sure they are shielded from touching the chassis) and turn the system back on. If the noise persists, then the problem is ground related. If the noise stops, then it is being radiated into the amp via the RCA cables. If the noise is being radiated by the RCA cables, simply re-route the cables away from power cables– specifi cally the +BATT cable that is connected to the battery. If whining noise is ground related then confi rm that all ground cables are secure in the vehicle and free of corrosion. Please see power and ground portion of this manual for correct system grounding instructions. MTX TECHNICAL SUPPORT 1.800.225.5689 LIMITED WARRANTY MTX amplifi ers purchased in the USA from an authorized MTX dealer are guaranteed against defects in material and workmanship for the period of 1 year from the date purchased by the end user if the product is installed by an authorized MTX dealer, a...