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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Stereo Installation Considerations | | | | | | | | | | Give your stereo some air. Properly installed, your stereo will be well ventilated so the heat sink can dissipate heat into the surrounding air. Make sure the unit is properly sealed to the dash so water cannot leak into the chassis or the connectors behind the dash. Pay particular attention if your unit is mounted below instrument gauges, as they are a common source of leaks. Always keep the front panel firmly closed. Use only UL-approved power connections and fuses with the proper ratings. The yellow memory B+ requires a1A fuse (supplied); the red ACC line requires a10A fuse (supplied). The built-in audio Expansion Port on the MRD-60 is designed to allow you to easily upgrade your Marine Audio Center. To increase the functionality of your system, you can add interface cards (IMR-4 or IMR-2) to allow the addition of optional accessories, such as remote controls, MP3, CD disc changers, iPod adapters, subwoofer amplifiers, boosters, zone expansion amplifiers, etc. | | | | | | | | | | Speaker Installation Considerations | | | | | | | | | | Speakers are directional—point them at your ears. When mounting, consider where your ears will be when listening, and point the speakers' central axis in that direction. Don't choke your sound. Flush-mount speakers need air behind them. More air is better. Allow at least one cubic foot of air behind your speakers so as not to compromise the bass response. Separate the air in front of the speaker from the air behind it. If there is no baffle (wall) separating the front of the speaker from the back, the positive air pressure at the front of the cone will rush around to fill in the vacuum behind the cone, instead of reaching your ears, which dramatically reduces bass response. This "free air response" explains why unmounted speakers may sound "tinny." Don't blow your speakers. Make sure your speakers can handle more power than your stereo can produce. The power specification on a stereo is the maximum amount of power the stereo will produce. The power specification on a speaker is the maximum amount of powerthe speaker can handle. Ifthe stereo can produce more powerthan the speakers can handle, you may blow your speakers at high volume. Use RMS power for comparison purposes. Compare the per channel power of the stereo with the per speaker power of the speakers. You cannot gain sound quality by increasing the maximum power handling of your speakers. A one-watt signal will not sound any better on 100-watt speakers than it will on 10-watt speakers. Use proper wiring. Use 18-gauge wire to connect your stereo to your speakers. Doorbell wire works well, it's inexpensive, comes in pairs, and isn't stranded, so there's less surface area to corrode. Seal all wires between the insulation and soldered area. Make sure positive terminals on speakers are matched with the positive side ofthe stereo output. | | | | | | z r r □ Z | | | | | | | | | | MRD-70 Stereo Installation Configuration Examples | | | | | | | | | | Basic MRD-70 System, Single Zone | | Multi-Zone System using RT-20 Router | | | | | | | | | | | | | | The MRD-70 can be configured as a single zone or up to 3 additional zones can be added. This will allow each cabin or bridge zone to access the master receiver or use local zone input. Each zone has separate volume control. Inputs such as iPod®, PC, and TV/DVD are all possible. The innovative intercom allows anyone in a zone to call all the other zones while muting the stereo. This is both a convenience and a safety feature. With an MZ-100 as the base for each expansion zone, up to 4 speakers and a subwoofer can be installed in each zone. Each zone must be supplied with 12v power, however, all communication between zones is accomplished using a single cable through the RT-20 Router. | | | | | | I | | | | | | | | | | | | | | poly-planan | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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