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LS2 and LR2 Balanced Audio Sender/Receiver
The Sonance LS2 and LR2 form a system designed to send
low-level audio signals long distances and in close proxim-
ity 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, fluores-
cent or neon lights, or along the same pathways as house
current). The active LS2 circuitry converts the unbalanced
signal to a balanced configuration and sends the balanced
signal to the LR2, which converts it back into an
unbalanced signal. This virtually eliminates any noise picked-
up over the length of the wire, 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 type of system the
LS2 serves as an unbalanced-to-balanced converter and
the LR2 serves as a balanced-to-unbalanced converter. The
LS2 can also be used with the 275 SE and ASAP2 SAT
amplifiers fitted with an LR1 SAT module (part# 91815).
Features:
• The LS2 unbalanced input and LR2 unbalanced output
connectors are high-quality gold-plated RCA connectors.
• The LR2 balanced input and LS2 balanced output connectors
are removable quick-toggle RIA connectors.
• The LS2 and LR2 operate on a single-output 12V DC
power supply (included with both units), and can also be
powered directly by 12V sources. The power inputs have
reverse-polarity protection.
• DC In and DC Out connections on both units allow the
installer to power multiple units from a single power supply.
• Recessed mounting holes allow wall mounting.
• Compatible with 3” TK-series SnapTrak
®
from Augat.
OUTPUT
BALANCED
INPUT
UNBALANCED
BALANCED LINE SENDER
+L– –R+
SH
LR
IN
OUT
12VDC
150mA
LS2
IN
OUT
12VDC
150mA
LR2
INPUT
UNBALANCED
OUTPUT
BALANCED
BALANCED LINE RECEIVER
+L– –R+
SH
LR
IN
OUT
12VDC
150mA
LR2
INPUT
UNBALANCED
OUTPUT
BALANCED
BALANCED LINE RECEIVER
+L– –R+SH
LR
Volume
Control
Power Amplifier
Speakers
Whole-Home System
Preamp/Controller
Zone 1
LS2
Sender
LR2
Receiver
LR2
Receiver
Volume
Control
Power Amplifier
Speakers
Zone 2
From
Preamp
Output
Typical LS2/LR2 System:
Locating Amplifiers in Local Zones
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)
212 Avenida Fabricante
San Clemente, CA 92672-7531 USA
(800) 582-7777 or (949) 492-7777
FAX:(949) 361-5151
Technical Support: (800)582-0772
WWW.SONANCE.COM
©2007 Sonance. All rights reserved. Sonance is a registered trademark of Dana Innovations.
Due to continuous product improvement, all features and specifications are subject to change without notice.
For the latest Sonance product specification information visit our website:
www.sonance.com
06/07