Niles Audio SI-1260 User Manual

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Niles Audio SI-1260 User Manual

I N S T A L L A T I O N & O P E R A T I O N G U I D E

Systems Integration Amplifier®

®

B L E N D I N G H I G H F I D E L I T Y A N D A R C H I T E C T U R E ®

CONGRATULATIONS!

Thank you for purchasing the Niles SI-1260 Systems Integration Amplifier, one of the most versatile and powerful multi-channel amplifiers ever offered. Like all Niles products, the SI-1260 is built to the highest standards of quality and reliability. With proper installation and operation, you'll enjoy years of trouble-free use.

Niles manufactures the industry's most complete line of custom installation components and accessories for audio/video systems. For a free full-line catalog write: Niles, Catalog Request, P.O. Box 160818, Miami, Florida 33116-0818 or visit www.nilesaudio.com.

TABLE OF CONTENTS

 

INTRODUCTION

2

 

 

 

 

 

 

FEATURES AND BENEFITS

3

 

 

 

 

 

 

SYSTEM DESIGN BASICS

5

 

 

 

 

 

 

SYSTEM DESIGN CONSIDERATIONS

6

 

 

 

 

 

 

APPLICATIONS

8

 

 

 

 

 

 

CONFIGURING YOUR SYSTEM

13

 

 

 

 

 

 

INSTALLATION CONSIDERATIONS

14

 

 

 

 

 

 

INSTALLATION

16

 

 

 

 

 

 

FRONT & REAR PANEL DETAILS

17

 

 

 

 

 

 

OPERATION

23

 

 

 

 

 

 

TROUBLESHOOTING GUIDE

27

 

 

 

 

 

 

CONFIGURATION WORKSHEET

29

 

 

 

 

 

 

SPECIFICATIONS

30

 

 

 

 

 

 

 

 

 

1

INTRODUCTION

Designed for use in high-end/high-powered distributed audio systems, the SI-1260 Systems Integration Amplifier provides a level of performance, flexibility, and ease of installation previously unavailable to custom installers. The SI-1260's unique design enables each of its channels to be independently configured to reproduce stereo or mono in any combination, as well as to compensate for differing volume levels in rooms of different sizes. Additionally, the amplifier's Dual Bus Matrixfeature and multiple inputs enable it to be used in several different applications simultaneously if desired (i.e. mono background music in some rooms and stereo in others).

As you read this manual and become more familiar with the SI-1260's capabilities, you will understand why our multi-channel amplifier design has won many prestigious industry awards. The first multi-channel amplifier introduced by Niles, the SI1200, was selected Best New Product in 1994 by both Sound & Video Contractor Magazine and the Custom Electronic Design and Installation Association (CEDIA). In addition, the SI-1200 also won the Consumer Electronics Show's Innovations '95 Design and Engineering Award.

SI-1260

Systems Integration Amplifier

Figure 1

INTRODUCTION

2

BENEFITS AND FEATURES

FEATURES AND BENEFITS

Microcontroller Based Real World Power

The SI-1260 12 channel amplifier incorporates microcontroller technology which maximizes the amplifier's operational efficiency and enables it to deliver a solid 60 watts per channel into 8 ohms, 20Hz to 20kHz, 0.04% THD. Its power increases to 80 watts per channel into 4 ohms, 20Hz to 20kHz, at 0.06% THD. The massive Multi-Tap Toroid power transformer features 6 independent secondary windings, one for each of the six amplifier modules. This extraordinary power supply design provides the power necessary to deliver solid, deep, controlled bass response to a house full of speakers.

Transparent Sound

The audio circuitry of the SI-1260 is constructed with the finest parts available including the latest in discrete output transistor design, featuring 1% metal film resistors, high quality capacitors and oversized heat sinks. All this attention to technical detail results in a sound that is clear and uncolored.

Microcontroller Based Operation and Protection Modes

The SI-1260 utilizes advanced microcontroller based operation circuitry that monitors all facets of the amplifier's operation and protection modes: over/under line voltage, main power fuse status, channel pair on/off status, thermal protection, short circuit/low impedance protection and DC output protection. Additionally, easy to see front panel LED indicators display the operation or protection mode for each channel pair (CH1/2, CH3/4, CH5/6, CH7/8, CH9/10 and CH11/12) as well as for the amplifier's main power supply, providing fast and easy troubleshooting. In the unlikely event that a problem occurs on one channel pair, the other channels will continue to play. When conditions return to normal, regular operation will resume.

Dual Input BusMatrixSelector

Nile’s unique Dual Input BusMatrixselector gives you the flexibility to individually assign each amplifier channel to a BusMatrixinput signal, either Left1, Right1, Left1+Right1, Left2, Right2, Left2+Right2, or to a dedicated signal input. With the BusMatrix, routing surround sound to the master bedroom, stereo to the den, and mono to a bathroom is as simple as flicking a switch. The Dual Input BusMatrixmakes the SI-1260 an ideal multi-room or multi-zone amplifier, offering the professional installer exciting new features and sound system design possibilities.

3

Twelve to Six Channel Configurable Power

Each of the SI-1260's six adjacent output pairs are bridgeable. You can create up to six 120-watt channels by setting the bridging switch to the "BRIDGED" position. These switches are located at the top of the rear panel (see Page 21 Figure 16). Bridging enables you to double the power to specific speaker locations, including large rooms and outdoor applications.

Freedom From Noise and Cross-Talk

The unique design of the SI-1260's Dual Input BusMatrixPC board ensures extremely high channel-to-channel isolation. Signal-to-noise ratio and cross-talk specifications are comparable to those of mixing consoles used in professional recording studios. With the SI-1260, the music playing in the living room will not interfere with the music playing in the den.

Independent Level Controls

Each channel has its own independent volume level control, enabling you to individually adjust the setting for up to twelve different speaker locations for optimum audio performance, providing uniform sound in every room.

Turn-On Modes

The SI-1260 features three selectable turn-on modes: (1) manual turn-on via the front panel switch, (2) microcontroller enhanced audio sensing which activates only the appropriate amplifier channels while leaving unused channel pairs off to eliminate cross talk and (3) a 3-30 volt AC/DC voltage trigger input which enables voltage activation. Audio Sense and External Voltage trigger modes enable you to configure the SI-1260 to turn on automatically in any kind of system configuration.

DB25 Audio & Voltage Trigger inputs

The SI-1260 incorporates a DB25 input connector to reduce wiring and installation time when using Niles Systems Integration Electronics. Niles multi-zone preamplifiers are equipped with a mating DB25 output connector. This output connector provides 6 zones of line-level audio signal output and a 12V Trigger Voltage for reliable amplifier activation.

Designed in the USA

The Niles SI-1260 was designed in the USA by Niles engineers and includes a two year parts and labor warranty.

BENEFITS AND FEATURES

4

BASICS DESIGN SYSTEM

SYSTEM DESIGN BASICS

As shown in Figure 2, a distributed audio/video system is defined by the number of listening zones it has. Within a listening zone you can listen to only one (1) source (e.g. CD, Radio, Tape, etc.) at any one time. A listening zone can consist of a single room or a group of rooms. To achieve different volumes and greater convenience in different rooms within a zone, individual volume controls can be used. Niles makes volume controls in various styles and colors. When designing your system, take into account who will use the system and when they will use it. Consult your local Niles dealer for more information.

CD PLAYER

TAPE PLAYER

VCR

TV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A Single-Zone System allows

 

 

 

 

 

 

 

 

 

 

 

 

only one source to be heard

 

 

 

 

 

 

 

 

RECEIVER

throughout the house at a

 

 

 

 

 

 

 

 

 

 

 

 

given time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FAMILY ROOM

LIVING ROOM

LISTENING ZONE 1

Figure 2 - Single Zone System

A multi-zone system as shown in Figure 3, offers the household more flexibility. For instance, a family might have their family room wired for surround sound and their living room wired for background music. In a two zone system, the children can watch TV in surround sound while Mom and Dad are reading the paper and enjoying background music in the living room.

CD PLAYER

 

TAPE PLAYER

 

 

VCR

 

 

 

 

 

 

 

 

TV

 

RECEIVER

 

 

RECEIVER

 

 

 

 

 

 

 

LIVING ROOM

FAMILY ROOM

LISTENING ZONE 1

LISTENING ZONE 2

Figure 3 - Multi-Zone System

5

SYSTEM DESIGN CONSIDERATIONS

Speaker Compatibility

A single channel (not bridged) of the SI-1260 is capable of driving a low impedance speaker load. As many as three eight ohm speakers can be safely connected to a single channel, presenting the amplifier a 2.66 ohm load. Proper ventilation of the SI-1260 is critical when driving low impedance loads. If the SI-1260 is not properly ventilated, the protection circuits may activate and shut off the channel at higher volume levels (for more information on proper amplifier placement, see Installation Considerations on page 14).

A channel pair that has been BRIDGED is capable of driving an impedance load of 4 ohms. Proper ventilation of the SI-1260 is critical when driving a 4 ohm load with bridged channels. If the SI-1260 is not properly ventilated, the protection circuits may activate and shut off the channel at higher volume levels (for more information on proper amplifier placement, see Installation Considerations on page 14).

When designing your system, try to specify 6-8 ohm speakers (Niles offers a complete line of in-wall, in-ceiling, outdoor and home theater loudspeakers with all models rated from 6-8 ohms).

Cable and Wire

Because the SI-1260 has many connections on the rear panel (see Figure 13), it is important that you correctly label all of the input cables and speaker wires. Label the cables and wires with their destination or source, rather than the SI-1260 terminal to which they are connected. This will make it easier to reconfigure your system in the future.

The SI-1260 connects to your sources via shielded line level audio cables with RCA connectors. Use high quality cables with your Niles amplifier for the lowest possible noise and best overall performance. Your Niles dealer can recommend the proper cable.

A DB25 Multi-Zone Input Connector is provided for use with Niles Multi-Zone Products which include a mating DB25 output connector. All 12 dedicated inputs are included within the single connector, along with the SI-1260's Voltage Trigger Input.

The SI-1260 connects to your speakers using two conductor speaker wire. For most applications, we recommend you use 16 or 18 gauge wire. For wiring runs longer than 80 feet, we recommend 14 gauge wire. The SI-1260's high-quality, gold-plated 5-way binding posts will accommodate up to 12-gauge wire. Attaching banana plugs to the wire will enable the connection of larger wire sizes.

CONSIDERATIONS DESIGN SYSTEM

6

CONSIDERATIONS DESIGN SYSTEM

Using Mono For Smoother Coverage

In large or irregularly shaped rooms, you may find that the main listening area may be closer to one of the speakers. If the speakers in the room are connected to a stereo amplifier you will only hear half the music. The SI-1260's BusMatrixenables you to create mono sound from one speaker without impacting the stereo quality in the rest of the system. You can configure each room to either stereo or mono as needed with no ill effects. Some of the most popular areas where mono will greatly enhance the sound quality would be:

Large rooms with many seating areas and/or many pairs of speakers.

Irregularly shaped rooms.

Bathrooms with one speaker over the tub and one speaker over the sink(s).

Hallways or passageways (including those with multiple speakers).

Small rooms, such as walk-in closets where more than a single speaker is not required.

Bridging Channels for Areas that Require More Volume and Power

There are several situations where bridging is an excellent way to improve the sound. There are also applications where bridging would seem to be appropriate but is not recommended. Bridging channels increases the power to 120 watts per channel with an 8 ohm impedance.

These are some of the most common Do's and Don'ts:

1.Outdoors (DO) - Sound dissipates faster outside than it does in a room where the walls enclose the sound and reflect it back to the listener. A pair of speakers playing into a large patio or yard will greatly benefit from bridging four channels into two 120 watt channels.

2.Surround Sound Systems (DO) - The dynamic demands for the center channel are much greater than the left, right or surround channels. This is an excellent application for two channels to be bridged into one 120 watt channel.

3.More than one pair of 8-ohm speakers (DON'T) - In a large room or a long hallway, often the best way to get good background music is to install multiple pairs of speakers. You will actually deliver more power to two pairs of 8 ohm speakers by using two unbridged amplifier channels than you would if you bridged four amplifier channels into two and connected the two pairs of speakers in parallel.

7

APPLICATIONS

Advantages of Using The SI-1260 in a Single Zone System

By connecting a Niles SI-1260 to a stereo receiver's preamplifier outputs, you dedicate a robust 60 watts to each speaker in your multi-room system. Each channel has its own level control, enabling you to compensate for architectural differences which may cause one speaker to seem louder than another. In addition, you can fine tune the system so that when all of the room volume controls are set to the loudest level, the large rooms and the small rooms play at the same volume.

 

 

 

DSS

 

 

 

 

 

 

VCR

 

 

 

 

CD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Preamplifier or

AM/FM receiver

SI-1260

Niles VCS-2D

Volume Control

Room 1

Room 2

Room 3

Room 4

Room 5

Room 6

Single Zone

Figure 4 - Single Zone

APPLICATIONS

8

CONSIDERATIONS DESIGN SYSTEM & APPLICATIONS

Creating a Low-Cost Second Zone

Using A Dedicated Source

The main problem in a single zone system is that when a source is being listened to in one room, you cannot listen to another source in another room simultaneously. However, for a listener who only listens to CDs, a low-cost second zone may be created to allow simultaneous CD listening while the main system is playing another source. This is possible only if the CD player you are using has dual audio outputs, one with remote controllable volume and the other a fixed volume. As shown in Figure 5, you connect the CD player's variable output to the SI-1260's dedicated channel inputs for the particular room where you will listen only to CDs. The fixed output is connected to the main preamp or receiver so you can also listen to CDs in the rest of the house. The finishing touch is to install a Niles infrared repeater system (IRR-4D, IRP-2+ and IRC-2) so you may adjust the CD player's volume via remote control from your CD listening room.

DSS

VCR

CD

 

(Fixed)

 

Preamplifier or

IRC-2

 

AM/FM receiver

 

 

(Variable)

BusMatrix

Input 1

 

 

BusMatrix

Input 2

 

SI-1260

I

 

 

Niles VCS-2D

 

 

Volume Control

 

IRP-2+

 

 

Niles IRR-4D+

 

 

IR Sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ZONE 1

 

 

 

ZONE 2

 

Figure 5 - Low Cost Second Zone for CDs

9

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