USER’S GUIDE
Table of Contents:
Introduction .............................2
Precautions ..............................3
Overview ................................. 4
Instructions..........................5-7
Specifications.....................8-9
Troubleshooting ...................10
CXBM-620
CX SERIES
CONDENSER BOUNDARY MICROPHONE
Charts .......................................11
Warranty .................................12
Thank you for choosing Senal.
Senal’s CX-series Professional Boundary Microphones are sleek, low-profile microphones
that are designed for capturing voices. Both omnidirectional and cardioid models are
perfect for video conferences, lectures, and meetings.
The CX-series microphones integrate into most AV conferencing systems or sound
systems. Balanced output minimizes unwanted RF interference and noise, even
over long cable runs, and a high-pass filter minimizes room noise and low-end
rumble. The microphones’ low-profile design offers an inconspicuous appearance
and an unobstructed view. Rugged metal housing protects the mic capsule, and the
nonskid padding keeps the microphone stable on a tabletop or lectern.
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2
Introduction
Precautions
• Please read and follow these instructions, and keep this manual in a safe place.
• Keep this product away from water and any flammable gases or liquids.
• Do not attempt to disassemble or repair this product.
• Handle this product with care.
• Clean this product with only a soft, dry cloth.
• Make sure that this product is intact and that there are no missing parts.
• All images are for illustrative purposes only.
Precautions
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3
Overview
Sound pickup
panel
LED
Indicator LED
On = Mic on
Off = Mute
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4
CXBM-620
Mute button
MUTE
High-pass filter switch
Up = Flat
Down = Low Cut
Overview
Setting Up
To set up your room with omnidirectional or cardioid CX
microphones, refer to the illustrations below.
Cardioid Polar Pattern
The CXBM-620/C rejects off-axis noise. Use it in rooms with
inadequate acoustic treatment or in spaces where background
noise is problematic. The CXBM-620/C will capture the voice of the
person sitting directly in front of it while it minimizes room noise
and reverberation.
Omnidirectional Polar Pattern
The CXBM-620/O microphone picks up sound in a 360-degree
pattern. Use it in quiet rooms with adequate acoustic treatment.
Microphones set in the center of the table will pick up all
participants seated around it.
MUTE
CXBM-620
LED
MUTE
LED
CXBM-620
CXBM-620
LED
MUTE
LED
CXBM-620
MUTE
LED
CXBM-620
MUTE
Instructions
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5
Using the CX Boundary Microphone
Each application of the CX Boundary Microphone will be slightly different. The following
scenarios cover frequently used setup.
Live Lecture/Sound Reinforcement
Ideal in an auditorium or house of
worship where a voice needs to be
amplified for an audience.
Note: CX-series microphones
need phantom power in order to
operate.
Video and Audio Conferencing
CX-series microphones are
compatible with most audio and
video conferencing systems. Refer
to the conferencing system’s user
manual for setup instructions.
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6
Mixing console
LED
MXBM-621/C
MUTE
Phantom power supply
LED
MXBM-621/C
MUTE
Remote video conference
system conference
LED
MXBM-621/C
MUTE
Power amplifier
Power amplifier
Power amplifier
Instructions
Powering the CX Microphone
The CX-series microphones operate on phantom power. Once connected to the power
source, the CX Boundary Mic is ready to work.
Important! When integrating the CX Boundary Mic into a video or audio conferencing
system, or using it with a mixing board, make sure that phantom power is enabled.
High Pass Filter
Activate the High Pass Filter when using the microphone in rooms with inadequate
acoustic treatment or constant noise from air conditioning, fans, or lights.
To roll off low frequencies, use the tip of a pen or a similar pointed object to switch the
high-pass filter to the on position.
Muting
CX-series microphones are equipped with an easy-touch membrane mute button. To
mute the microphone while in use, press the mute button. The indicator LED will turn off
to show that the microphone has been muted.
Press the mute button again to resume operation.
Instructions
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7
Specifications
CXBM-620/C CXBM-620/O
Transducer
Polar pattern
Frequency response
Maximum input level
Sensitivity
High-pass lter
Impedance
Operating voltage
Output connector
Mute switch
Housing material
Dimensions (L × W × H)
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8
Back electret condenser Back electret condenser
Cardioid Omnidirectional
60 Hz–16 kHz 60 Hz–16 kHz
114 dB (THD ≤1.5% @ 1 kHz) 120 dB (THD ≤1.5% @ 1 kHz)
-31 dB ±3 dB (0 dB=1 V/Pa @ 1 kHz) -34 dB ±3 dB (0 dB=1 V/Pa @ 1 kHz)
150 Hz, 6 dB octave attenuation 100 Hz, 6 dB octave attenuation
340 Ω ±30% @ 1 kHz 340 Ω ±30% @ 1 kHz
9–52 V DC phantom 9–52 V DC, 4 mA typical
TA3 male TA3 male
Membrane mute switch Membrane mute switch
Metal Metal
4 × 2.9 × 0.9 in. (10 × 7.3 × 2.3 cm) 4 × 2.9 × 0.9 in. (10 × 7.3 × 2.3 cm)
Specications
Weight
Cable length
Cable connectors
CXBM-620/C CXBM-620/O
7.4 oz. (210 g) 7.4 oz. (210 g)
25 ft. (7.6 m) 25 ft. (7.6 m)
TA3 female, XLR male TA3 female, XLR male
Specications
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9
Troubleshooting
Problem Solution
The microphone
is connected, but
there’s no sound.
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10
• Make sure that both XLR connectors on the cable are fully inserted into the
plugs on the microphone and input device (conferencing system or mixing
board).
• Make sure you are connected to an XLR port with phantom power, and that
the phantom power is turned on.
• If the indicator LED is off, touch the mute button to unmute the micro
phone.
• Refer to the user manual of your AV conferencing system to ensure the
input settings are correct.
-
Troubleshooting
Relative Response in dB
Relative Response in dB
Frequency Response Graph - Cardiod
-30
-40
-50
-60
-70
50
20
100 500
1K
Frequency in Hertz
Cardiod Polar Pattern
0°
180°
30°
60°
90°
120°
150°
330°
300°
270°
5K
10K
20K
240°
210°
Frequency Response Graph - Omni
-30
-40
-50
-60
-70
50
100 500
Frequency in Hertz
Charts
20
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Omni Polar Pattern
0°
180°
30°
60°
90°
120°
150°
11
330°
300°
270°
1K
5K
10K
20K
240°
210°
Two-Year Limited Warranty
This Senal product is warranted to the original purchaser to be free from defects in materials and workmanship
under normal consumer use for a period of two (2) years from the original purchase date or thirty (30) days
after replacement, whichever occurs later. The warranty provider’s responsibility with respect to this limited
warranty shall be limited solely to repair or replacement, at the provider’s discretion, of any product that fails
during normal use of this product in its intended manner and in its intended environment. Inoperability of the
product or part(s) shall be determined by the warranty provider. If the product has been discontinued, the
warranty provider reserves the right to replace it with a model of equivalent quality and function.
This warranty does not cover damage or defect caused by misuse, neglect, accident, alteration, abuse,
improper installation or maintenance. EXCEPT AS PROVIDED HEREIN, THE WARRANTY PROVIDER MAKES
NEITHER ANY EXPRESS WARRANTIES NOR ANY IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED
TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. This
warranty provides you with specific legal rights, and you may also have additional rights that vary from state
to state.
To obtain warranty coverage, contact the Senal Customer Service Department to obtain a return merchandise
authorization (“RMA”) number, and return the defective product to Senal along with the RMA number and
proof of purchase. Shipment of the defective product is at the purchaser’s own risk and expense.
For more information or to arrange service, visit www.senalsound.com or call Customer Service at 212-594-2353.
Product warranty provided by the Gradus Group.
www.gradusgroup.com
Senal is a registered trademark of the Gradus Group. © 2017 Gradus Group LLC. All Rights Reserved.
GG4
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