Niles SI-2150 User Manual

AMPLIFIERS
INSTALLATION GUIDE
SI - SI - SI -
9901253-Rev-A-SI-2150Manual.indd 1 6/8/12 9:43 AM

Niles SI-2150 Specifications

General

Amplifier Type	Stereo Power Amplifier
Number of Channels	2
Total Harmonic Distortion (THD)	< 0.1%
Signal-to-Noise Ratio	> 100 dB
Input Sensitivity	1.0 V
Power Output (8 Ohms)	150 Watts
Frequency Response	20Hz - 20kHz
Protection Circuits	Short Circuit
Trigger Input	12V DC
Output Impedance	4 Ohms

Summary

Important Safety Instructions

Introduction

Features and Benefits

Real World Power

Details amplifier power output at different impedances for robust sound.

Transparent Sound

Explains audio circuitry quality, fine parts, and resulting clear, uncolored sound.

Freedom from Crosstalk

Describes independent power supplies for each channel, ensuring audio isolation.

Current for Reactive Loads

Highlights high current design and toroidal transformer for handling reactive loads.

Freedom from Fan Noise

Mentions oversized heat sinks for cooling without distracting fan noise.

Independent Level Controls

Features individual level controls for precise volume matching or limiting.

Lifetime Connections

Notes gold-plated stereo inputs/outputs and binding posts for durable connections.

Turn-On Modes

Lists three modes for amplifier turn-on: Music Sense, Voltage Trigger, Manual.

Automatic Protection

Describes built-in protection circuits that shut down the amplifier on fault detection.

Status Display for Troubleshooting

Explains LED indicators for power, active status, and protection warnings.

Control Output

Provides a 12V DC output for triggering external devices like screens or curtains.

Bridged Mode

Explains bridged mono configuration for increased power output for demanding applications.

Compact 1U Design

Highlights the low-profile, single rack space (1U) design for easy integration.

Designed and Engineered in the USA

States product origin and mentions limited two-year parts and labor warranty.

Installation Considerations

Placement

Instructions on positioning the amplifier for proper ventilation, stability, and airflow.

Turn-On Modes

Detailed explanation of the three amplifier turn-on modes: Constant, Audio Sense, Trigger.

Bridged Mode

Guide on using the bridged mode to combine channels for higher power output.

Multiple Speaker Loads

Information on connecting multiple speakers and handling low impedance loads safely.

Cable and Wire

Recommendations for speaker wire gauge, types, and proper connection techniques.

Front and Rear Panel Details

Installation

Setting the Turn-On Mode Switch

How to select the desired turn-on mode using the physical switch on the unit.

Control Output

Details on using the 12V DC control output for triggering external devices.

Speaker Wire Connections

Guide on connecting speaker wires, including bare wire and banana plug methods.

Line Level Audio Input

Instructions for connecting audio sources via RCA phono plugs to the amplifier.

Cascade Audio Outputs

How to connect multiple amplifiers in series using cascade outputs for expansion.

AC Power Plug

Instructions for connecting the amplifier to the AC power source via the IEC socket.

Operation

Power Switch

Explanation of the front panel master power switch and its vacation mode function.

Power LED

What the power indicator light signifies regarding AC connection and switch status.

Bicolor Status LED

Meaning of the green (on) and red (protection) status LED indicators on the amplifier.

Level Adjustment Screws

How to use rear panel screws to adjust the amplifier's output level relative to system.

Cleaning and Maintenance

Guidelines for cleaning the amplifier exterior and basic annual connector maintenance.

Troubleshooting Guide

Specifications

Limited Warranty