Figure 10 - Turn-On Mode.

INSTALLATION CONSIDERATIONS

Automating the turn-on of your SI-1260 is one of the easiest steps when installing it in a distributed system. However, do not plug the main power cord into the switched AC outlet of your preamplifier or receiver. The high power design of the SI-1260 requires large amounts of current from its AC power source. Additionally, it is always recommended to activate the system preamplifier/receiver before turning on your SI-1260 in order to prevent system “turn-on thumps”. In order to address these important needs, the SI-1260 has three special turn-on modes that let you turn the amplifier on only when it is needed. These three options are accessed by the Turn- On Mode selector switch (see Figure 10).

Important! The Front Panel Power Switch must be in the ON (switch in) position for any of the three turn-on options to function (refer to page 23 for more information concerning the Front Panel Power Switch).

Turn-On Modes

Constant: The auto turn-on circuitry is "OFF". The front panel master power switch operates the amplifier. When the switch is in, the amp is "ON", when it is out, the amp is "OFF".

Audio Sense: The amplifier is "OFF" when there is no audio signal present at any of the 16 inputs, but the sensing circuitry is active. The turn-on sensing circuitry looks for a tiny amount of audio signal present at any of the audio inputs. If it detects a signal, the adjacent pair of amplifier channels (i.e. channel 1/2,

3/4, 5/6, etc.) assigned to receive the input signals will switch "ON". Once the audio signal stops, the sensing circuit waits approximately 2-minutes, then switches all amplifier channels "OFF".

3-30V AC/DC Trigger Input: The amplifier is "OFF" when a 3 to 30-Volt AC or DC signal is not applied to the voltage trigger input. Once the sensing circuitry detects such a voltage, all adjacent pairs of amplifier channels that are receiving an audio signal switch "ON". Once the voltage is removed, the Voltage Trigger circuit instant- ly switches the amplifier "OFF". Voltage triggers may be supplied by Niles automat- ed switchers, some video projectors, some surround sound processors, or a 12 Volt DC wall adapter (Niles FG00665) plugged into the switched outlet of your stereo receiver.

If you are using a wall adapter or external power supply to provide the trigger, it doesn't have to be very large (a minimum current capability of 2.5-milliamps for a 3 Volt trigger increasing up to a minimum of 38 milliamps for a 30-Volt trigger).

INSTALLATION CONSIDERATIONS

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Niles Audio SI-1260 manual Installation Considerations
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SI-1260 specifications

The Niles Audio SI-1260 is a high-performance multi-channel amplifier designed to deliver exceptional sound quality and power for home audio systems. Renowned for its reliability and versatility, this amplifier is perfect for both custom installations and standalone use, catering to audiophiles and casual listeners alike.

One of the standout features of the SI-1260 is its impressive power output. With 60 watts per channel at 8 ohms, this amp provides ample power to drive a variety of speakers, ensuring clear and dynamic sound reproduction across different genres of music and audio formats. For users who require additional power, the SI-1260 can deliver 100 watts per channel at 4 ohms, making it suitable for larger rooms and demanding setups.

The SI-1260 employs advanced Class D amplification technology, which is known for its efficiency and minimal heat generation. This not only leads to lower energy consumption but also allows for a more compact design—a crucial aspect for home installations where space can be at a premium. The amplifier’s compact size does not compromise its performance; it boasts a robust output that maintains sound integrity even at higher volumes.

Another significant advantage of the SI-1260 is its versatile connectivity options. Equipped with multiple inputs, including RCA and balanced XLR connections, users can seamlessly integrate it into their existing audio systems. This flexibility allows the amplifier to work well with a variety of audio sources, including home theater systems, whole-house audio systems, and more.

The SI-1260 also incorporates advanced protection circuitry, safeguarding against overloads, short circuits, and overheating. This ensures not only the longevity of the amplifier itself but also the longevity of connected speakers, providing peace of mind for users.

For those who appreciate ease of use, the Niles Audio SI-1260 features a universal control interface, allowing compatibility with remote control systems and automation. This makes it an ideal choice for smart home integrations, enhancing the user's overall audio experience.

In conclusion, the Niles Audio SI-1260 stands out as a feature-rich, powerful, and efficient multi-channel amplifier suitable for a wide range of audio applications. With its excellent power output, advanced Class D technology, versatile connectivity, and reliable protection features, it delivers high-quality sound that meets the demands of modern audio enthusiasts.
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