Applicationnotes, Tools Required, Speaker Pairs, Receiver

MODEL SPS-6Speaker Selection System (continued)

APPLICATIONNOTES

Connections

If your amplifier or receiver has "A" and "B" speaker pair outputs, connect the SPS-6 to the "A" points. Do not con- nect anything to "B". This will prevent the amplifier or receiver from driving an unusually low impedance load.

Using the SPS-6 with Tube Type Amplifiers

Virtually all tube amplifiers must have a load connected at all times. If the amplifier to be connected to the SPS-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 per- manently connect a 150 ohm, 5 watt resistor across the tube amplifier's output in parallel with the SPS-6.

Impedance Matching

You will need to activate the SPS-6's PROTECTION button whenever the overall system impedance might fall below 4 ohms.

Connections

TUNER 94.9	Receiver
15

AMPLIFIER

SPEAKER 6

SPEAKER 5

SPEAKER 4

SPEAKER 3

SPEAKER 2

SPEAKER 1

NILES

Niles Audio

Corporation, Inc.

Miami, Florida USA

Speaker Pairs

Protecting a Tube Amplifier

Tube Amplifier

150 150

150 ohm, 5 watt Resistors

AMPLIFIER

SPEAKER 6

SPEAKER 5

SPEAKER 4

SPEAKER 3

SPEAKER 2

SPEAKER 1

NILES

Niles Audio

Corporation, Inc.

Miami, Florida USA

TOOLS REQUIRED

•1/8" Standard Slotted Screwdriver

•Wire Stripper

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 speaker	OFF

2, or more pairs of 4-ohm speakers	ON
Any combination of 4 and 8 ohm speakers	ON

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Niles Audio SPS-6 Applicationnotes, Tools Required, Speaker Pairs, Tube Amplifier, Connections

Models: SPS-6