IR-CSX Infrared Wireless Classroom System

IR-CSX-kit

Advantages of Infrared

Infrared wireless microphone systems are the best solution for classrooms. In today’s RF saturated world a regular (VHF or UHF) microphone system risks interference from a variety of other devices and sources. Cell phones, radios, TV, PA systems, police and emergency service systems, etc., can all interfere with VHF and UHF, but not with IR. Furthermore, infrared is perfect for classroom audio, since, unlike the other systems, IR is short-range, cannot penetrate walls, and is dependent on line-of-sight. This means that a school can have as many classrooms as desired with individual audio systems without fear of interference. Since the Azden system is dual-channel, the teacher can have one microphone and a second person can also have a microphone. In addition, since each classroom system is on the same pair of channels, teachers can go from room to room without having to switch microphones.

Complete Classroom System

A powerful teaching aid, the IR-CSX is a complete audio system that increases student awareness and lowers teaching fatigue. The one piece ceiling mount IRR-50P is a self contained Infrared Receiver/Amplifier with built in sensor easily powers the 4 ceiling mount speakers for clean, precise audio throughout the room. Three high performance transmitters are provided with the system: IRN-20 Teacher Pendant Microphone, IRN-30 Mini Handheld Student’s Microphone and IRT-10 Line Level Audio Transmitter.

System features include: Paging Override: The IR-CSX integrates with the school’s existing audio system so school-wide announcements can always be heard. Wireless Remote: A wireless remote control is included for volume adjustment of all 3 channels, and power ON/OFF. Audio outputs are provided for external recording devices and for additional amplification. Sensor input for even larger room coverage (requires optional sensor).

The IR-CSX kit includes 4 high-quality in-ceiling speakers (ACS-6.5), plus 4 AA-size rechargeable batteries (1HR-3U) and 2 power chargers (BC-31) for the transmitters. All you need to complete the installation is the wiring for the speakers and sensor. 

Components

IRR-50P

2-Channel Ceiling Mount IR Receiver with Sensor

The heart of the Azden IR-CSX infrared system is the IRR-50P powered, 3-channel receiver. With an integrated 360 degree IR sensor it’s designed to be mounted directly in a ceiling tile and comes with mounting brackets. Optional additional sensors may be ordered for coverage of larger rooms (Part # IRD-60).

The receiver’s amplifier provides optimal power to drive the 4 included high-quality ceiling speakers, which may be placed around the room to evenly distribute sound for the whole classroom.

The receiver accepts 3 channels of wireless audio allowing for the use of a teacher’s microphone, a student’s microphone and a line-level audio signal (such as from a MP3 play, smartphone, tablet or TV) to be used simultaneously. Volume for the 3 audio channels and power on/off is controlled by the included wireless remote control.

IRN-20

Teacher's Pendant IR Microphone/Transmitter

A lightweight, chest worn, microphone/transmitter, the IRN-20 comes with an adjustable lanyard. It is both a microphone and infrared transmitter which wirelessly “links” the teacher to the IR receiver. It has a specially designed internal microphone array which provides great sound pick-up, but for added flexibility, mini-plug connections are included for an external microphone or line-level signal. The teacher can control the volume of the whole system with the volume control buttons on top. With just one “AA” battery (alkaline or rechargeable) the microphone can be used the entire school day without recharging or changing batteries. If using the provided NiMH AA rechargeable battery, it can be charged while installed inside the IRN-20, by connecting the BC-31 wall-charger (note that other battery brands will not be able to charge in-unit).

IRN-30

Mini Handheld IR Microphone/Transmitter

Small and lightweight, the IRN-30 is the perfect handheld “pass-around” microphone for student participation. The built-in microphone provides excellent sound pick up, but for added flexibility, mini-plug connections are included for an external microphone or line-level signal. It is powered by just one “AA” battery (alkaline or rechargeable) and is compatible with all Azden infrared models. If using the provided NiMH AA rechargeable battery, it can be charged while installed inside the IRN-30, by connecting the BC-31 wall-charger (note that other battery brands will not be able to charge in-unit).

IRT-10

Line-Level Audio IR Transmitter

More and more, multimedia is becoming part of the classroom. The IRT-10 allows you to play the audio from your multimedia devices wirelessly over the classroom system for all the students to hear equally well. Connect any line-level audio equipment, such as that from a CD or MP3 player, a smartphone or tablet, from a computer or TV. Because the IRT-10 operates on its own channel, the audio played does not interrupt the use of the teacher and student microphones. A volume control is included on top of the unit for added convenience. The IRT-10 runs on two AA size batteries (alkaline or rechargeable). Just like the other transmitters, with the provided NiMH batteries installed, they may be charged in-unit by connecting a BC-31 wall-charger. (Note that other battery brands will not be able to charge in-unit.)

Remote Control

Controls Volume and Power of IRR-50P

Since the amplifier and receiver (IRR-50P) are now in the ceiling, control over the volume of the 3 wireless channels and power on/off are accessible via the handy remote control which comes with the IRR-50P. The remote requires two AAA size batteries to operate (not included).

ACS-6.5

In-Ceiling Speakers (4 Included)

The ceiling speaker is designed to provide optimum performance for the teacher’s voice in addition to audio from other sources (CD/MP3 player, VCR, etc.). Each speaker features a sealed-back enclosure and 6.5” polypropylene midrange/woofer to produce natural bass response, while the coaxially-mounted 1” polycarbonate tweeter provides superior high frequency response. Easily flush-mounted in any drop-ceiling, four of these speakers provide smooth, evenly distributed sound throughout the classroom. All students can enjoy enhanced audio equally.

In addition to the components listed above, the IR-CSX kit comes with two wall-chargers for the transmitters (Part# BC-31) and four AA size Ni-MH rechargeable batteries (Part# 1HR-3u). Optionally, additional sensors can be purchased separately (Part# IRD-60). Speaker wire and coaxial cable is not included with this kit.

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Specifications

IRR-50P 3-ch Receiver w/Power Amp & IR Sensor

Sub-carrier frequencies:  2.06MHz / 2.56MHz / 2.80MHz simultaneously
Type:  Super Hetero-dyne-Crystal Controlled
Modulation:  FM
Frequency response:  35Hz-7.0kHz ±10dB
Distortion:  less than 1%
Speaker output:  5W x 4 @4 ohrms
Input terminal: Paging(100V-70V / 20v-8 ohrms / off) x 1, external sensor x 1
Output terminal:  Pre out x 1 、Rec out × 1
Wireless remote controller:  Power (On / OFF), Audio volume (UP /DOWN)
Power requirement:  DC 15V, 28mA(Stand-by) / 560mA(1/8 w output)
Dimensions:  250 x 250 x 47 mm
Weight:  2.2kg

IRT-10 Line-Level TX

Sub-carrier frequencies:  2.80MHz
Modulation:  FM
Frequency max deviation:  <±40kHz
Frequency response:  50 – 10kHz ±3dB
Aux/Line input:  φ3.5mm mini jack
Input adjustment:  ×1
Battery type:  2 AA alkaline / 2 AA rechargeable NiMH
Battery life:  >8 hours w/alkaline battery
Size:  100 x 64 x 27 mm
Weight:  160g w/battery

IRN-20 Teacher’s Mic/TX

Sub-carrier frequencies:  2.06MHz
Modulation:  FM
Microphone element:  Uni directional ECM x2
Frequency max deviation:  <±40kHz
Frequency response:  100 – 8kHz ±3dB
Aux/Line input:  φ3.5mm mini jack
Mic input:  φ3.5mm mini jack
Mic gain adjustment:  from +6dB to -10dB
Battery type:  1 AA alkaline / 1 AA rechargeable NiMH
Battery life:  >8 hours w/alkaline battery
Size:  95 x 25 x 50 mm
Weight:  74g w/battery

IRN-30 Student’s Mic/TX

Sub-carrier frequencies:  2.56MHz
Modulation:  FM
Microphone element:  Uni directional ECM x1
Frequency max deviation:  <±40kHz
Frequency response:  100 – 8kHz ±3dB
Aux/Line input:  φ3.5mm mini jack
Mic input:  φ3.5mm mini jack
Mic gain adjustment:  from +6dB to -10dB
Battery type:  1 AA alkaline / 1 AA rechargeable NiMH
Battery life:  >8 hours w/alkaline battery
Size:  27 x 27 x 90 mm
Weight:  74g w/battery