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Fabricant : Jensen Taille : 315.61 kb Nom Fichier : Langue d'enseignement:

Back the volume down just a bit. On the amplifier, slowly turn up the input level control (clockwise or to the right) until you just start to hear distortion, then back it down a bit. Now your radio and amplifier levels are matched. BASS EQ The Bass EQ is continuously adjustable from 0 to +12dB @ 45Hz. Adjusting the Bass Boost level allows different subwoofer/enclosure combinations to be equalized. Use this control to increase the level of low bass available from your subwoofer/ enclosure combination. Ported and Band Pass enclosures should be limited to about +6dB to +9dB of boost. Sealed enclosures should be able to accept the full +12dB of boost, if necessary. The full +12dB of boost should be reserved for special applications since improper use of the Bass Boost could damage your subwoofers at high volumes. Low Pass Filter (LPF) The Low Pass Filter controls adjust the crossover point. Typical crossover is between 60Hz and 80Hz for ported and sealed enclosures. Bandpass boxes will typically use a higher crossover setting between 125Hz and 150Hz. Since musical tastes vary, you should play music that you would normally listen to in your vehicle, with the above settings as a starting point. If necessary, set the crossover by ear. High Pass Filter (HPF) The high pass filter will limit the low frequencies being transmitted to your speakers. This can be useful in number of situations. For example, if you selected the high pass filter and set the crossover to 40Hz, then you would have an infra- sonic (sub-sonic) filter at 40Hz, which would be useful with certain enclosure/subwoofer combinations that were tuned between 45Hz and 50Hz. Other uses might include limiting the low frequencies to smaller speakers (6 1/ 2" , 6 X 9", etc.) by adjusting the crossover to a higher setting (80–100Hz) . Crossover (X-OVER) The Jensen PowerPlus series of amplifiers have built- in low- pass and high- pass crossover filters for bi-amplifying the system. Adjust the crossover to accommodate your chosen installation method. Select LPF (low pass filter) when the amplifier will be driving woofers or subwoofers. Choose FULL or OFF when crossover mode is not active and the amplifier is in “ full range” mode. Select HPF (high pass filter) when the amplifier will be driving full-range or separate speakers, and you want to limit the “bass” being transferred to these speakers. Mode Switch PowerPlus 420 and 1302 The 420 and 1302 come equiped with a ST/MO (stereo/ mono) MODE switch. Use STEREO mode when you have a 2- channel input from the source unit. Use MONO mode when you have a single input from the source unit. See “Input Wiring” on page 9. PowerPlus 840 and 1304 The 840 and 1304 come equiped with a 4/ 3/ 2 MODE switch and can be configured for three different input modes: 2 channel, 3 channel or 4 channel. 11 PowerPlus Amplifiers Testing Before finishing the installation, perform the following tests to make sure the wiring is correct and everything is operating properly. Reconnect Battery When wiring is complete, reconnect the battery negative terminal. Test Power Wiring Turn on the receiver, but do not turn up the volume. The amplifier power light should come on. If not, check the REM and +12V (B+) wires. Turn up the receiver volume slightly. All speakers should operate. If not, check wiring connections at amplifier and speakers. Test Speaker Connections These tests make sure the speakers are connected properly. If speakers don’t play at all, one ( or both) speaker wires may be disconnected. Remote Input Level Control The PowerPlus 900, 1150 and 1302 come equipped with a Remote Input Level Control. The Remote Input Level Control allows the input level to be adjusted from an alternate location. It can be mounted under-dash or in-dash. When the amplifier is used to drive subwoofers and the low pass crossover is activated, the Remote Input Level Control can be used as a “ remote bass level control”. This enables you to control the bass level independent from the rest of the system. This is convenient for system tuning and/or when playing many different types of music. The Remote Input Level Control uses a 6- pin modular cable for connectivity. Simply plug the 6- pin modular cable into the amplifier and then into the Remote Input Level Control to activate the circuit. 50 250 500 Power Min Max 12 PowerPlus Amplifiers Troubleshooting Problem Possible Cause Corrective Action Amplifier does not turn on No power to +12V terminal Check fuse(s) No power to REM terminal Check head unit fuse(s) and wiring Blown main fuse at battery Replace fuse and identify cause of failure Blown ...

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