Installation Considerations

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

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 receiv- er or amplifier will void the warranty. Consult your Niles deal-

3.Locate the on/off buttons on the HPS-4/HPS-6 which cor- respond to the speaker pairs you wish to play. Set them to the ON position (Engaged).

4.Turn on the amplifier or receiver and select a source, such as the tuner or CD player.

“TECH TIP”

You will need to activate the

HPS-4/HPS-6’s

protection button

er, 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 parallel, the impedance will be 4 ohms; two pairs of 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 con- necting more than two pairs of speakers without using some form of impedance correction.

The HPS series 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 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 HPS-4/HPS-6 series will present a 4.5 ohm impedance load to

5. Slowly turn up the amplifier or receiver volume and set it	whenever the overall
to a comfortable (not maximum) listening level. Be careful	system impedance
not to overdrive or “clip” your amplifier. If the sound	might fall below
becomes muddy or distorted, you have reached the limit	4 ohms.
of your amplifier’s volume capability and should quickly
reduce the volume to avoid damaging your speakers.

When playing the following speakers:	The Protection button should be:
1 or 2 pairs 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.