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Фрагмент инструкции
tuning tuning the crossover All of the crossover controls in the multi-crossTM crossover section are marked at four reference frequency points. These are 45Hz, 175Hz, 600Hz and 5,000Hz. Specific crossover points should be chosen based on the operating range recommended by the manufacturer of your speakers. The 85Hz position is a good starting point to use for subwoofer low-pass or midrange high-pass use. When bi-amping a/d/s/ loudspeaker components 2500Hz is a good starting point for the midrange low-pass, and 3500Hz is recommended as the tweeter high- pass. Once installed, you can fine tune the crossover points using your ears or with the aid of an RTA to achieve maximum performance. With any loudspeaker, minor deviations from the recommended frequency ranges may provide superior results, depending on your speaker locations and your vehicle’s acoustics. Setting crossover frequencies higher than recommended will not cause damage and may provide good results. However, DO NOT set high-pass tweeter crossover points below the tweeter’s recommended operating range. Doing so will likely cause damage not covered by the manufacturer’s warranty. If you are using non-a/d/s/ speakers, refer to the manufacturer’s recommendation for selecting the proper crossover frequencies. 9 18 xover control 5/6 (P650) – The crossover selection for channels 5&6 has three possibilities: When the switch is in the left position, the crossover section of the amplifier is bypassed. Channel 5&6 output is full range. When the switch is the center position, channels 5&6 are filtered through a 12dB per octave high-pass crossover that is infinitely variable from 45Hz to 5,000Hz. When the switch is in the right position, channels 5&6 receive signal from the crossover output of channels 3&4. xover control 7/8 – The crossover selection for channels 7&8 has three possibilities: When the switch is in the left position, the crossover section of the amplifier is bypassed. Channel 7 & 8 output is full range. When the switch is the center position, channels 7 & 8 are filtered through a 12dB per octave high-pass crossover that is infinitely variable from 45Hz to 5,000Hz. When the switch is in the right position, channels 7 & 8 receive signal from the crossover output of channels 5 & 6. System 3 – The P850 is used in fully active 8-channel mode. Channels 1/2 are high-passed for front tweeters. Channels 3/4 are bandpassed for front midrange. Channels 5/6 are bandpassed for front midbass. Channels 7/8 are low-passed for subwoofers. The P850 is configured for 2-channel input. Note: Optional AC502 can be used in this system to adjust the level of the subwoofers. System 4 – The P850 is used in bridged 4-channel mode. Channels 1/2 and 3/4 are high-passed bridged-mono for front speakers. Channels 5/6 and 7/8 are low-passed summed bridged for sub- woofers. Front speaker level control is adjusted by the ch3/4 level control. Subwoofer level is con- trolled by the ch5/6 level control. the P840.2 is configured for 2-channel input. Note: Optional AC502 can be used in this system to adjust the level of the subwoofers. 17 10 installation 1. Disconnect the battery ground cable. Reconnect the ground cable only after the installation is complete and the wiring has been checked to make sure that there are no problems. If your radio features a code type security system, be sure you know the code before disconnecting the battery! 2. Run a minimum AWG #8 power wire directly from the battery to the PowerPlate™ mounting location. Install a fuseholder at the battery end of this cable either within 18" of the battery or before the wire runs through any metal partitions. Do not install the fuse at this time. 3. Attach a minimum AWG #8 ground wire to a solid chassis ground point near the mounting location. Keep this wire as short as possible. Scrape all paint and primer off of the sheet metal at the ground point to ensure a good electrical connection. Attach the wire to the ground point with a nut, bolt and star washer. 4. Run the signal leads and remote turn-on leads from the head unit to the PowerPlate™ loca tion. If using an internally powered radio or factory radio refer to the "signal sources" ...
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