User manual NILES TVA-20

[. . . ] Only an 1/8" standard screwdriver and wire stripper are required for installation. Frequency response: Flat (+0 dB, -0 dB) from 20 Hz to 20 kHz. Proudly made in the USA. q q q q q q q q 3 H IGH D EFINITION S PEAKER S ELECTION S YSTEM Installation Considerations TVA-20 Power Handling The TVA-20 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 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 TVA-20 connections. For wiring runs longer than 80 feet, 14 gauge wire is recommended. Using speaker wire larger than 14 gauge for the TVA-20 connections is not recommended--the wire may not fit into the connectors. Never use solid-core, aluminum, or "Romex" type wire with the TVA-20. 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". Consult your Niles dealer, building contractor, or local building and inspection department if unsure about which type of wire is best for your application. "TECH TIP" Wire size is expressed by it's AWG (American Wire Gauge) number. The lower the AWG number, the larger the wire, i. e. , 12 AWG wire is physically larger 5 H IGH D EFINITION S PEAKER S ELECTION S YSTEM 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 through the speakers. 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. To turn off the speaker pair, simply press the corresponding ON/OFF button on the TVA-20. If your amplifier or receiver has "A" and "B" speakerpair outputs, connect the TVA-20 to the "A" outputs. Do not connect anything to "B". This will prevent the amplifier or receiver from driving an unusually low impedance load. 11 H IGH D EFINITION S PEAKER S ELECTION S YSTEM Playing Two or More Speaker Pairs Simultaneously "TECH TIP" 1. Make sure the amplifier or receiver power is OFF and set the volume to minimum. On the right side of the TVA-20's front panel is a button labeled PROTECTION. This button activates the TVA-20's impedance correction circuitry. The circuitry assures that your receiver or amplifier will see a safe operating load when playing multiple speaker pairs simultaneously. [. . . ] Refer to the Protection chart for the correct setting of the PROTECTION button. Constant Protection Switch The TVA-20 is equipped with a manual override for the protection circuit that enables you to defeat the front panel protection switch and maintain constant impedance protection. This will safeguard your amplifier from being overdriven due to accidental or improper use by anyone unfamiliar with the equipment. To engage this override, move the rear panel "CONSTANT PROTECTION" switch to the "ON" position. Constant impedance protection will be maintained until the switch is turned to "OFF". 13 H IGH D EFINITION S PEAKER S ELECTION S YSTEM Balancing Speaker Volume The volume control on your receiver or amplifier serves as the "master" volume for all speaker pairs connected. [. . . ]