PN: IMA-120
Amplifier | Infrared Microphone Receiver | Audio Mixer | Wall Panel Controller







Build Your System


Matrix™ Description

The Matrix™ is ideal for any room where the amplifier needs to out of sight and/or in a vault for security. It connects to the same ceiling sensor and speakers as our other user-friendly systems.

However, with a simple CAT-5 cable, the TeachLogic CPS-120 (or CPR-125) wall controller manages the audio sources and volume levels so that the amplifier can be installed somewhere secure.

The controller has an intuitive touch interface with the additional benefits of Bluetooth and an additional 3.5 mm input. When combined with up to 2 wireless microphones and four (8-ohm) overhead speakers, the Matrix™ is more than just a sound system…it creates a true “Sound Field” in the classroom so every student hears all audio sources equally well.

Why IR?

Matrix™ Details


  • 2 infrared wireless microphone receivers with volume control
  • 2 stereo, line level, or aux inputs (3.5 mm)
  • 1 dual mono line level output for Assistive Listening System with gain control (3.5 mm)
  • 2 Power Amplifiers: Total 50 W RMS (Class D amplifier, 25 W ea channel)
  • Security Alert, contact closure, N/O, N/C
  • Page override (muting) with Page Pass-through to classroom speakers | Input level 100 V, 70 V, 25 V
  • RS-232 wall panel control, RJ-45
  • RS-232 on/off switch
  • Teacher Priority instantly attenuates all line inputs
  • Bass/Treble control equalizer ±12 dB
  • 2 external microphone sensor inputs, single RCA


Weight 1.3125 lbs
Dimensions 1.5 × 7.5 × 4.25 in
Receiver Input

Infrared FM


FM Wide-band

Reception Frequencies

Ch. A: 2.08 MHz
Ch. B: 2.54 MHz

Infrared Wavelength

850 nm

Tone Signal

Ch. A: 32.768 kHz


50 μs

Frequency Response

40 hz – 18 kHz, ±3 dB

S/N Ratio

>65 dB

Total Harmonic Distortion

<1 % @ 1 kHz

Nominal Deviation

±10 kHz

Maximum Deviation

±25 kHz

External Sensor Input

2, RCA

Connectivity Coverage

1,600 sq ft

Line Inputs

2 : 3.5 mm line level aux with +10 dB gain control

Line Output

3.5 mm line level output with gain control

Page Over-Ride

2-pin Phoenix; 3 settings: 100 V, 70 V, 25 V


Level control

Security Alert

Contact closure (COM, N/O, N/C)


Bass/Treble control, ±12 dB

Output Power

2 digital amplifiers @ 25 W, 50 W total (RMS)

Output Impedance

4 Ω min/channel4-pin Phoenix connector

Power Supply

19 VDC, 3.4 A; CE, CSA and UL Listed

Matrix™ Components

Classroom Component Layout

  • Sapphire (IRT-60) wireless pendant transmitter, a high-quality cardiod microphone with lanyard.
  • ICS-55 Ceiling Sensor gives 360-degree infrared coverage for optimal audio performance.
  • Matrix™ Sound Field amplifier/receiver to support classroom audio sources.
  • SP-628 Ceiling Speakers (four shown) provide excellent quality voice reproduction.
  • SP-2000 Wall Mount Speakers (optional), allow for installation when ceiling is not accessible.
  • CPS-120 Wall Mount Control Panel with Bluetooth.

Matrix™ Downloads

Matrix™ Frequently Asked Questions

  • add_circleremove_circle_outlineCan I use 1 system for 2 rooms, but turn off the speakers in the second room when they don't need to be used?

    Sometimes a single system is used to support two rooms. However, at times it may be desirable that the speakers in the second room are switched off so the sound does not play in that room. The best way to accomplish this would be with a 3rd party speaker switch such as the one seen here. It is wired inline between the TeachLogic amplifier and the speakers.

    1. Plan for the switch location, and measure the length of wire needed to ensure this device is within reach of the user.
    2. Connect the TeachLogic amplifier speaker channel that you wish to turn off to the “amp input” connection on this device.
    3. Then connect the speakers you wish to control to the “speaker output” connections on this device.
    4. Test.