Niles Audio Installation Considerations, SS-4/SS-6 Power Handling, Amplifier Impedance Load

S P E A K E R S E L E C T I O N S Y S T E M

S P E A K E R S E L E C T I O N S Y S T E M

Installation Considerations

SS-4/SS-6 Power Handling

The SS-4/SS-6 is designed for use with a receiver or amplifier having a maximum power output of 100 watts per channel at 8 ohms. Damage caused by the use of a higher-power receiv- er or amplifier will void the warranty. Niles speaker selectors with higher power handling capabilities are available. 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. For example, if two pairs of 8-ohm speakers are connected in par- allel, the impedance will be 4 ohms; two pairs of

Playing Two or More Speaker Pairs Simultaneously

1.Make sure the amplifier or receiver power is OFF and set the volume to minimum.

2.On the right side of the SS-4/SS-6’s front panel is a button labeled PROTECTION. This button activates the SS-4/SS-6’s impedance correction circuitry. The circuitry assures that your receiver or amplifier will see a safe operating load when play- ing multiple speaker pairs simultaneously. Since most receivers and amplifiers are not rated for use below a 4 ohm load, you will need to activate the Protection button whenever the over- all system impedance might fall below 4 ohms. Use the follow- ing chart as a guide for setting the Protection button.

“TECH TIP”

You will need to acti- vate the SS-4/SS-6’s PROTECTION button whenever the overall system impedance might fall below

4 ohms.

4-ohm speakers in parallel become 2 ohms, and so on.

Most receivers or amplifiers are not rated for use below a 4 ohm load. Most manufacturers do not recommend connect- ing more than two pairs of speakers without using some form of impedance correction.

The SS-4/SS-6 includes impedance correction circuitry which protects your receiver or amplifier from low impedance loads. The circuitry assures that your receiver or amplifier will see a safe operating load, even when all speaker pairs are playing at the same time.

When playing the following speakers:	The Protection button should be:
1 or 2 pair of 8-ohm speakers	OFF
3 or more pairs of 8-ohm speakers	ON
1 pair of 4-ohm speakers	OFF
2 or more pairs of 4-ohm speakers	ON
Any combination of 4 and 8 ohm speakers	ON

Set the Protection button to the correct position using the chart shown above.

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