Sonance LR2 User Manual

INTRODUCTION

Thank you for purchasing the LS2/LR2 balanced line sender/receiver. The LS2 converts line-level audio to a balanced line configuration; the LR2 converts balanced line audio back to line-level.

When connected with high-quality 4-conductor shielded audio wire (such as Sonance MediaLinQ), the LS2 and LR2 form a system designed to provide high-quality/low-loss audio for long-distance requirements. They can send low-level audio signals long distances and in close proximity to sources of noise interference without inducing noise or high-frequency roll-off. As a general rule of thumb, a balanced signal should be used for anything but short lengths of audio cable (under 20 feet) and wherever the possibility of signal interference is likely (i.e. where the audio signal passes near dimmers, transformers, fluorescent and neon lights, or along the same pathways as house current). The active LS2 circuitry sends the signal to the LR2, virtually eliminating any noise picked up through the wire during the signal transfer, leaving only the original signal.

The LS2 and LR2 are always used in conjunction with each other, except when

used in conjunction with equipment with balanced inputs or outputs (such as professional sound or recording equipment). In this manner,the LS2 could be used as an unbalanced-to-balanced converter and the LR2 could be used as a balanced-to-unbalanced converter. The LS2 can also be used with the 275 SE and ASAP2 SAT amplifiers with an LR1 SAT module (part# 91815) installed.

LS2/LR2 NEW FEATURES

The LS2 and LR2 incorporate several new features that improve their performance and installability:

• The LS2 and LR2 operate on a single-output 12V DC power supply, and can also be powered directly by 12V sources in cars, boats or RV installations. The LS2 and LR2 power inputs have reverse polarity protection.

•

DC In

and

DC Out

connections allow multiple units to share a single power supply.

• The LS2 and LR2

Balanced Input

and

Balanced Output

connectors are removable

quick-toggle RIA connectors.

• The LS2 and LR2 chassis have recessed mounting holes that allow them to easily be wall-mounted using two screws.

• The LS2 and LR2 chassis’ are compatible with 3” TK-series SnapTrack

from Augat.

INSTRUCTION MANUAL

LS2 and LR2 INDUSTRY UPGRADE BALANCED LINE SENDER AND RECEIVER

OUTPUT

BALANCED

INPUT

UNBALANCED

BALANCED LINE SENDER

+L– –R+

OUT

12VDC 150mA

LS2

OUT

12VDC 150mA

LR2

INPUT

UNBALANCED

OUTPUT

BALANCED

BALANCED LINE RECEIVER

+L– –R+

OUT

12VDC 150mA

LR2

INPUT

UNBALANCED

OUTPUT

BALANCED

BALANCED LINE RECEIVER

+L– –R+SH

OUT

12VDC 150mA

LR2

INPUT

UNBALANCED

OUTPUT

BALANCED

BALANCED LINE RECEIVER

+L– –R+SH

Volume Control

Power Amplifier

Speakers

Whole-Home System Preamp/Controller

Zone 1

LS2

Sender

LR2 Receiver

Volume Control

Power Amplifier

Speakers

Zone 3

Volume Control

Power Amplifier

Speakers

Zone 2

From Preamp Output

APPLICATIONS

Here are two examples of how the LS2 and LR2 can be used in different system configurations:

Illustration 1: Locating Amplifiers in Local Zones

SONAMP 875D SE

PROTECTION

AUTO-ON

BBE ON

ACTIVE

1–2 3–4 5–6 7–8

LRLRLR

OUTPUT

BALANCED

INPUT

UNBALANCED

BALANCED LINE SENDER

+L– –R+

OUT

12VDC 150mA

LS2

OUT

12VDC 150mA

LR2

INPUT

UNBALANCED

OUTPUT

BALANCED

BALANCED LINE RECEIVER

+L– –R+

Bedroom System Receiver

Speakers Speakers Speakers

Bedroom Speakers

From Main

Outputs

From Tape Record Outputs

Aux

Inputs

Whole-Home

System Preamp

CD Changer

iPort with iPod

Whole-Home

System Amplifier

LS2

Sender

LR2

Receiver

Volume Control

Zone 1 Zone 2 Zone 3

Illustration 2: Connecting Remote Sources to a Local System

Locating Amplifiers in Local Zones

(see

Illustration 1

)

Locating power amplifiers close to the speakers they drive minimizes power loss through long speaker wire runs. The LS2 converts the preamp output to a balanced signal, allowing it to be sent long distances to local amplifiers without noise interference or high-frequency loss. Local LR2s convert the balanced signal back to an unbalanced line-level audio for the amplifiers. The LS2’s balanced output can be “daisy-chained” to up to nine (9) LR2s.

Connecting Remote Sources to a Local System

(see

llustration 2

)

A whole-home audio system can be connected to a local system, allowing its sources to become sources for the local system. The LS2 converts a preamp output or tape record output from the whole-home preamp/controller to a balanced signal that can then be sent a long distance. An LR2 at the local system converts the balanced signal to a line-level signal that is then connected to an input on the local system.

CONNECTING THE LS2 AND LR2 (see

Illustration 3

)

IMPORTANT: Make sure all source components and power amplifiers are turned OFF before making any connections.

Do not plug the power supply into a wall outlet until all connections have been made.

1. Use a stereo RCA cord to connect the audio source component to the LS2’s Unbalanced Input.

2. Use shielded 4-conductor wire,such as Sonance MediLinQ 22/4 audio wire (part #91874), to connect the LS2’s Balanced Output terminals to the LR2’s Balanced Input terminals as shown in Illustration 3. The maximum length of 4-conductor wire that can be used is 1,000 feet.

• Make sure to connect the “+” terminals together and the “–” terminals together and to connect Left to Left and Right to Right.

IMPORTANT: To minimize ground noise, connect the wire shield ONLY to the ‘

SH’

terminal on the LS2 sender. DO NOT connect the wire shield to the LR2 receiver. Make sure not to allow the shield to touch any of the adjacent wires.

• If you’re sending the LS2’s signal to multiple LR2s, ‘daisy-chain’ the LR2s together using lengths of 4-conductor shielded audio cable. You can feed up to nine (9) LR2 receivers from a single LS2 sender. The maximum length of 4-conductor wire that can be used is 1,000 feet total.

• Do not connect the wire shield to any of the LR2 receivers.

4. Connect the included PS-1 power supplies to the LS2’s and LR2’s 12V DC jacks and plug them into non-switched AC outlets that supply continuous current.

• You can power up to nine (9) LR2 receiver units from the LS2’s single

power supply. Connect a power supply cable with standard 2.1mm internal diameter connectors between the LS2’s 12V DC Out jack and the first LR2’s 12V DC In jack,and then daisy-chain the next LR2’s 12V DC In jack to the first LR2’s 12V DC Out jack using another power supply cable (up to 9 total LR2s). Repeat for all LR2s.

SPECIFICATIONS

(0dB ref = 0.775V)

THD + Noise: <01%, 20Hz – 20kHz

Signal-to-Noise Ratio: >-100dB (IHF-A wtd.)

CMRR (LR2): >98dB (20Hz – 5kHz); >75dB (5kHz – 20kHz)

Frequency Response: 20Hz – 20kHz ±0.2dB

Input Impedance: 47k ohms (LS2 unbalanced inputs)

Output Impedance: 600 ohms (LR2 unbalanced outputs)

Power Consumption: 55mA ±5% @ 12VDC (LS2);

30mA ±5% @ 12VDC (LR2)

Dimensions (WxHxD): 4” x 2” x 3” (102mm x 51mm x 76mm)

INSTRUCTION MANUAL

LS2 and LR2 INDUSTRY UPGRADE BALANCED LINE SENDER AND RECEIVER

OUT

12VDC

150mA

LR2

INPUT

BALANCED

OUTPUT

UNBALANCED

BALANCED LINE RECEIVER

+L– –R+SH

OUT

12VDC

150mA

LR2

INPUT

BALANCED

OUTPUT

UNBALANCED

BALANCED LINE RECEIVER

+L– –R+SH

OUTPUT

BALANCED

INPUT

UNBALANCED

BALANCED LINE SENDER

+L– –R+SH

OUT

12VDC

150mA

LS2

Connect Shield

DO NOT

Connect

Shield

DO NOT

Connect

Shield

4-Conductor Shielded Audio Wire (Sonance part #91874)

Up to 1,000’ total length

Unbalanced Inputs

From Unbalanced Source Component

Power

Supply

Connections

Balanced Outputs

Unbalanced Outputs

Balanced Inputs

Unbalanced Outputs

Balanced Inputs

Power

Supply

Connections

Power

Supply

Connections

LS2 Balanced Line Sender

LR2 Balanced

Line Receiver #1

LR2 Balanced

Line Receiver #2, etc.

To Unbalanced Amplifier, etc.

Illustration 3: LS2 and LR2 Connections

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