User manual NILES MSA-6R

[. . . ] Connectors accommodate wire sizes 14-22 gauge (16 gauge recommended) Overall Dimensions 17" wide x 2" high x 8-3/4" deep Weight 4-1/2 lb. Installation Considerations 3 Installation Operation 5 6 Specifications 14 14 H IGH P OWER S PEAKER S ELECTION S YSTEM H IGH P OWER S PEAKER S ELECTION S YSTEM Installation Considerations Power Handling The HPS series is designed for use with a receiver or amplifier having a maximum power output of 250 watts per channel at 8 ohms. Damage caused by the use of a higher-power receiver or amplifier will void the warranty. Consult your Niles dealer, or receiver/amplifier manufacturer, if you are uncertain about the power rating of your receiver or amplifier. Amplifier Impedance Load As more pairs of speakers are parallel connected to a receiver or amplifier, the overall system impedance becomes lower. [. . . ] The circuitry assures that your receiver or amplifier will see a safe operating load, even when all four speaker pairs are playing at the same time. The actual impedance load the speaker selector presents to your receiver or amplifier will vary, depending on how many speaker pairs are playing, and the impedance rating of each speaker. If you have four pairs of 8-ohm speakers playing, the MSA-6R/HPS-6 series will present a 4. 5 ohm impedance load to 3 3. Locate the on/off buttons on the MSA-6R/HPS-6 which correspond to the speaker pairs you wish to play. Turn on the amplifier or receiver and select a source, such as the tuner or CD player. Slowly turn up the amplifier or receiver volume and set it to a comfortable (not maximum) listening level. Be careful not to overdrive or "clip" your amplifier. If the sound becomes muddy or distorted, you have reached the limit of your amplifier's volume capability and should quickly reduce the volume to avoid damaging your speakers. "TECH TIP" You will need to activate the MSA-6R/HPS-6's protection button whenever the overall system impedance might fall below 4 ohms. When playing the following speakers: 1 or 2 pairs of 8-ohm speakers 3 or more pairs of 8-ohm speakers 1 pair of 4-ohm speakers 2 or more pairs of 4-ohm speakers Any combination of 4 and 8 ohm speakers The Protection button should be: OFF ON OFF ON ON Set the PROTECTION button to the correct position using the chart shown above. 12 H IGH P OWER S PEAKER S ELECTION S YSTEM H IGH P OWER S PEAKER S ELECTION S YSTEM Using the HPS Series with Tube-Type Amplifiers Virtually all tube amplifiers must have a load connected at all times. If the amplifier to be connected to the MSA-6R/HPS-6 is a tube amplifier, be sure to always have at least one pair of speakers switched on at all times. An alternative is to permanently connect a 150 ohm, 5 watt resistor across the tube amplifier's output in parallel with the MSA-6R/HPS-6. See (Figure 1). AM PL IFI ER Figure 3 Removing the Connectors SP EA KE R4 Installation "Tech Tip" 1. This will prevent the amplifier or receiver from driving an unusually low impedance load. your receiver/amplifier. With six pairs of 4-ohm speakers playing, the load drops to slightly under 4 ohms. If you intend to use the HPS series with more than two pairs of 4-ohm speakers, it is recommended that you verify that the receiver or amplifier is capable of driving a 4-ohm load. Consult your Niles dealer, or receiver/amplifier manufacturer, if you are uncertain about the capabilities of the receiver/amplifier. Type of Speaker Wire For most applications, we recommend you use 16 or 18 gauge, stranded copper speaker wire for the MSA-6R/HPS-6 connections. For wiring runs longer than 80 feet, 14 gauge wire is recommended. Using speaker wire larger than 14 gauge for the MSA-6R/HPS-6 connections is not recommended--the wire may not fit into the connectors. Never use solid-core, aluminum, or "Romex" type wire with the MSA-6R/HPS-6. When running speaker wires inside walls, most states and municipalities in the U. S. specify that you must use a special type of speaker wire. Usually, the requirement is that the wire has a specific "CL" fire rating, such as "CL-2" or "CL-3". [. . . ] Locating speaker wires too close to a light dimmer or switch may cause a "buzzing" or "popping" sound to be heard through the speakers. If you must locate the MSA-6R/HPS-6 wiring near electrical devices, route the speaker wires several feet away from the electrical wiring. Tools Required · 1/8" Standard Slotted Screwdriver · Wire Stripper 2. On the right side of the MSA-6R/HPS-6's front panel is a button labeled PROTECTION. This button activates the MSA-6R/HPS-6's impedance correction circuitry. [. . . ]