Listen SoundConnect 2 User manual
Listen, Inc. 580 Harrison Ave, Suite 3W, Boston, MA 02118
Tel: (617) 556-4104 Fax: (617) 556-4145 Web: www.listeninc.com
Listen, Inc. 580 Harrison Ave, Suite 3W, Boston, MA 02118
Tel: (617) 556-4104 Fax: (617) 556-4145 Web: www.listeninc.com
SoundConnect 2
User Manual
TM
Listen, Inc. 580 Harrison Ave, Suite 3W, Boston, MA 02118. Tel: (617) 556-4104.
PN: 8024 REV 052715
SOUNDCONNECT 2 USER MANUAL
© COPYRIGHT 2013-2015 LISTEN, INC.
PN: 8024 REV 022820
SOUNDCONNECT 2 USER MANUAL
© COPYRIGHT 2013-2020 LISTEN, INC.
REV 022820
SoundConnect 2TM Manual Contents i
Contents
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Channel Settings Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Lemo Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Software Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Overall settings for unit: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output Gain 0 dB / +6 dB option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connection Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Equipment Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Service and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Contents
SoundConnect 2TM Manual Limited Warranty iii
Limited Warranty
LISTEN, Inc., a Massachusetts Corporation, having its principal place of business at 580 Harrison Ave,
Suite 3W, Boston, MA 02118 (Manufacturer) warrants its SoundConnect 2 products (the Products) as
follows:
1. Limited Warranty.
Manufacturer warrants that the Products sold hereunder will be free from defects in material and
workmanship for a period of one (1) year from the date of purchase. If the Products do not conform to this
Limited Warranty during the warranty period (as herein above specified), Buyer shall notify Manufacturer in
writing of the claimed defects and demonstrate to Manufacturer satisfaction that said defects are covered
by this Limited Warranty. If the defects are properly reported to Manufacturer within the warranty period,
and the defects are of such type and nature as to be covered by this warranty, Manufacturer shall, at its own
expense, furnish, replacement Products or, at Manufacturer's option, replacement parts for the defective
Products. Shipping of the replacement Products or replacement parts shall be at Buyer's expense.
2. Other Limits.
THE FOREGOING IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. Manufacturer does not warrant against damages or defects arising out of
improper or abnormal use of handling of the Products; against defects or damages arising from improper
installation (where installation is by persons other than Manufacturer), against defects in products or
components not manufactured by Manufacturer, or against damages resulting from such non-Manufacturer
made products or components. Manufacturer passes on to Buyer the warranty it received (if any) from the
maker thereof of such non-Manufacturer made products or components. This warranty also does not apply
to Products upon which repairs have been effected or attempted by persons other than pursuant to written
authorization by Manufacturer.
3. Exclusive Obligation.
THIS WARRANTY IS EXCLUSIVE. The sole and exclusive obligation of Manufacturer shall be to repair or
replace the defective Products in the manner and for the period provided above. Manufacturer shall not
have any other obligation with respect to the Products or any part thereof, whether based on contract, tort,
strict liability or otherwise. Under no circumstances, whether based on this Limited Warranty or otherwise,
shall Manufacturer be liable for incidental, special, or consequential damages.
4. Other Statements.
Manufacturer's employees or representatives' ORAL OR OTHER WRITTEN STATEMENTS DO NOT
CONSTITUTE WARRANTIES, shall not be relied upon by Buyer, and are not a part of the contract for sale
or this limited warranty.
5. Entire Obligation.
This Limited Warranty states the entire obligation of Manufacturer with respect to the Products. If any part
of this Limited Warranty is determined to be void or illegal, the remainder shall remain in full force and
effect.
SoundConnect 2TM Manual IMPORTANT SAFETY PRECAUTIONS 1
IMPORTANT SAFETY PRECAUTIONS
SoundConnect 2 has been supplied in safe operating condition.
This User’s Manual contains information and warnings that should be followed by the user to
ensure safe and service free operation. Special note should be made of the following:
1. Read these instructions
2. Keep these instructions
3. Heed all warnings
4. Follow all instructions
5. WARNING: To prevent fire or electric shock, do not expose this equipment to rain or
moisture. Do not use this apparatus near water.
6. Clean only with a dry cloth. Do not use spray or liquid cleaning solutions.
7. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus that produce heat.
9. The appliance coupler is the AC mains disconnect and should remain readily operable
after installation.
10. Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11. Use only attachments/accessories specified by Listen, Inc.
12. Use only with hardware, brackets, stands, and components sold with the apparatus or by
Listen, Inc.
13. Unplug the apparatus during lightning storms or when unused for long periods of time.
14. Whenever it is likely that the correct functioning or operating safety of the apparatus has
been impaired, the apparatus must be made inoperative and be secured against
unintended operation. Any adjustment, maintenance and repair of the open apparatus,
under power, must be avoided as far as possible and, if unavoidable, must be carried out
only by trained service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain
or moisture, does not operate normally, or has been dropped.
AND SYMBOL EXPLANATIONS
2 IMPORTANT SAFETY PRECAUTIONS SoundConnect 2TM Manual
Safety Symbols
Power In Connector
CAUTION! Do not substitute the supplied AC power adapter. Substituting the AC power
adapter may damage the product and introduce safety hazards. Only use power adapters
supplied by or approved by Listen, Inc.
Polarized Mic Input Connectors
CAUTION! The Polarized Mic In 1 and Polarized Mic In 2 connectors on the rear panel are
intended to interface to microphones requiring a polarization voltage of 200V. The polarization
voltage supply available from these connectors is current limited to 10μA and does not
represent a safety hazard. To minimize exposure to the polarization voltage supply, only use
prefabricated cables and accessories recommended for use by the polarized microphone manufacturer.
Promptly dispose of damaged cables or accessories.
The exclamation point triangle is used to indicate that caution is necessary when operating the
device or control close to where the symbol is placed, or to indicate that the current situation
needs operator awareness or operator action in order to avoid undesirable consequences.
This alerts the user to the presence of important operating and maintenance (servicing)
instructions in this manual.
SoundConnect 2TM Manual Introduction 3
Introduction
SoundConnect 2TM is a compact and rugged USB controlled microphone power supply and conditioning
amplifier. It can power either one or two microphones, so it is a great choice for audio test applications
where two microphones need to be powered simultaneously, for example headphone testing, stereo
measurements, or anywhere you need a reference microphone as well as your input microphone.
Features
USB Control
SoundConnect 2 features full USB control in addition to the manual interface, which permits control
of the device from within your test and measurement software or directly from your computer.
Message Step control requires SoundCheck 14 or later.
Powers most test microphones:
Two powered BNC connectors on the rear panel provide 10 VDC power for Listen SCM
microphones, and IEPE power for IEPE microphones or accelerometers. Optional LEMO
connectors are available for powering microphones that require 200 V polarization. It is fully TEDS
compatible* for seamless communication of calibration data to your measurement device.
Wide frequency response
SoundConnect 2 has a bandwidth greater than 100 kHz, and offers gain control from -20d B to
+40 dB in 10 dB increments. User-selectable low pass (22.4 kHz and 120 kHz) and high pass
(1 Hz, 10 Hz, 20 Hz, 100 Hz) 2nd order Butterworth filters with -1 dB corners, permit the frequency
response to be tailored for a wide variety of applications. Each channel is independently
configurable, and the configurations can be stored for later recall.
Low Self-Noise
SoundConnect 2 offers excellent dynamic range and low distortion which makes it a good choice
for production line environments as well as the R&D lab. Balanced inputs and outputs offer
excellent noise immunity and ground loop immunity.
Simple User Interface
The front panel features simple push buttons for power and gain control; multicolored level
indicators and a 2-line LCD display offers a clear readout of settings.
Compact and Lightweight
The unit is compact and lightweight, measuring just 4 3/8” wide and 2 units high. Up to four units
can be mounted side by side in a 19” x 2U rack.
Excellent Value
SoundConnect 2 is less than half the price of other microphone power supplies that offer similar
functionality.
* Feature under development. Available soon as a software upgrade.
Requirements
NI Visa is required for Listen Hardware such as: AmpConnect, AudioConnect and SoundConnect 2. It is
automatically installed with the SoundCheck installer for Windows and must be manually installed for Mac
OS.
4 Introduction SoundConnect 2TM Manual
Front Panel
The front panel controls allow you to select the
input type for each channel as well as other
settings. Pressing the Setup button will display
other menus to access the various options.
Power Switch
The LED indicator shows when unit is powered
on. The current state of SoundConnect 2 is
stored in memory when it is shut off via the front
panel power switch. These values are recalled
the next time it is turned on.
LCD Display
Parameters are displayed on the top row; values on the bottom.
Channel Settings Mode
This is the default, power up state displayed whenever power
is applied to the unit. Channel Settings Mode provides access
to the parameters that are changed the most: Source and
Gain.
Channel Buttons 1 and 2
Allows you to select the input connector and bias configuration for each
channel. (These buttons are also used to select other parameters in
other Setup Modes.)
Pressing either Channel Button will change the respective channel’s
signal source:
Line In: 1/4” TRS Input, Balanced or Single ended operation
Mic In: Microphone connected to BNC input. No Bias enabled
MicSCM: Microphone connected to BNC input. Biased for constant voltage, e.g.: SCM-2 or SCM-3
microphones, as well as electret capsules. Use with SCM Microphone requires a Microdot to BNC
adapter. See SCM Microphone with Microdot to BNC Adapter on page 13.
MicIEPE: Microphone connected to BNC input. Biased for constant current microphones.
MicLemo: Microphone connected to Polarized Lemo input. Bias may be +200V or off.
Also used for SCM Microphone with a Microdot to Lemo adapter. See SCM Microphone with
Microdot to BNC Adapter on page 13.
(This option is only available when the optional Lemo board is installed.)
Muted: For use when an output signal is not desired, especially when minimizing noise during
system setup.
Figure 1-1: Front Panel
Line In
-10dB Mic In
+30dB
Figure 1-2: Channel Settings Mode
Table of contents
Other Listen Amplifier manuals
