Operation

ep Oration

Power Switch

The front panel switch is a master or “vacation” power switch. No matter which turn-on mode you have selected, the master power switch will turn off all circuitry—including the sensing circuitry. If you will not be using the amplifier for an extended period of time, turn the master power switch “Off” (push button switch out). When you would like to return to normal operation, turn the switch ”On” (push button switch in).

Power LED

The power LED indicates that the AC cord is plugged into a working AC power receptacle and that the power switch is in the ”On” position.

Active LED

The rear panel turn-on mode switch determines when and how the amplifier will turn on. The ”Active” LED indicates that the amplifier is operating.

Protection LED

The front panel protection LED indicates that the amplifier has been shut down because of either a fault in the wiring or the speaker, or with the SI-2125 itself.

Level Adjustment Screws

The front panel level adjustment screws allow you to adjust the level of the SI-2125 relative to other amplifiers in your system. Use a 1/8” slotted screwdriver to adjust the screws. If the SI-2125 is the only amplifier in your system, leave the screws at their factory default position (turned fully clockwise).

Cleaning and Maintenance

The internal parts of the SI-2125 are electronic and require no maintenance. Once a year it is appropriate to twist the RCA connectors on each input to remove corrosion and improve conductivity. You can clean the amplifier with soft cloth or paper towel dampened with water or a mild detergent. Do not use any spray-type, abrasive cleaners on the amplifier.

SI-2125 specifications

The Niles Audio SI-2125 is a versatile and powerful amplifier designed to meet the demands of modern audio systems, whether for home theater setups or multi-room audio solutions. Offering robust performance and user-friendly features, it stands out in the crowded field of amplifiers.

At the heart of the SI-2125 is its high-power output capability, delivering 125 watts per channel at 8 ohms. This ensures that it can drive a wide range of speakers, providing clean and dynamic sound that enhances the listening experience. The amplifier operates efficiently, allowing it to run cool, reducing the risk of overheating during extended use.

One of the standout features of the SI-2125 is its versatile connectivity options. It comes equipped with multiple input options, including both balanced XLR and unbalanced RCA connections. This flexibility enables easy integration into various audio setups, whether it’s a dedicated home theater system or a more extensive multi-zone audio installation. The amplifier also includes a trigger input for automatic power on/off, which simplifies operation and enhances convenience.

The SI-2125 incorporates high-quality components that contribute to its impressive sound quality. It features a toroidal transformer, which is known for its efficiency and low electromagnetic interference, resulting in a cleaner sound. The amplifier also utilizes a distinctive Class AB design, which balances the advantages of both Class A and Class B amplification, providing ample power while maintaining excellent audio fidelity.

Another noteworthy characteristic of the SI-2125 is its robust build quality. The amplifier comes housed in a durable chassis, designed to minimize vibrations and protect the internal components. This not only enhances longevity but also helps maintain the integrity of the sound. The front panel features a sleek design with clearly labeled controls that provide easy access to essential functions, including volume control and input selection.

In addition to performance, the SI-2125 also supports a range of advanced features aimed at enhancing usability. This includes a unique feature set that accommodates various speaker configurations, allowing users to optimize their audio experience to suit their specific preferences and room acoustics.

Overall, the Niles Audio SI-2125 is an exceptional choice for anyone seeking a high-performance amplifier that combines power, versatility, and ease of use. Its impressive specifications and thoughtful design make it an ideal addition to any serious audio setup, ensuring that listeners can enjoy their favorite music and movies with remarkable clarity and fidelity.