Matrix™ 120 Receiver Amplifier

PN: IMA-120

Amplifier | Infrared Microphone Receiver | Audio Mixer | Wall Panel Controller

The Matrix™ is ideal for plenum applications of the Sound Field amplifier/receiver. With a simple CAT5 cable, the TeachLogic CPS-120 (or CPR-125) wall mount controller manages audio sources connected to the amplifier.

The controller has an intuitive touch interface with the additional benefit of Bluetooth® pairing of an extra audio device (such as a amartphone). And with two infrared wireless microphone channels, the Matrix™ is sure to be the low profile, high feature Sound Field solution you’ve been looking for.






Matrix™ 120 Receiver Amplifier 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


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 V DC, 3.4 A; CE,CSA and UL Listed

Dimensions 4.25 × 7.5 × 1.5 in
Weight 1 lbs 5 oz

Matrix™ 120 Receiver Amplifier 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™ 120 Receiver Amplifier Downloads