S P E A K E R S E L E C T I O N / V O L U M E C O N T R O L S Y S T E M
may not fit into the connectors. Never use solid-core, alu- minum, or "Romex" type wire with the SVL-4AB. When run- ning 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". Consult your Niles dealer, building contractor, or local building and inspection department if unsure about which type of wire is best for your application.
Avoiding Interference
Speaker wires can act as an antenna for electrical noise. Locating speaker wires too close to a light dimmer or switch may cause a "buzzing" or "popping" sound to be heard though the speakers. If you must locate the SVL-4AB wiring near electrical devices, route the speaker wires several feet away from the electrical wiring.
Using the SVL-4AB with Tube-Type Amplifiers
Virtually all tube amplifiers must have a load connected at all times. If one of the amplifiers to be connected to the SVL-4AB is a tube amplifier, be sure to always have at least one pair of speakers switched on at all times. An alternative is to perma- nently connect a 150 ohm, 5 watt resistor across the tube amplifier's output in parallel with the SVL-4AB. See (Figure 1) on next page for a hookup diagram.