Quantum™ II Amplifier

Portable | Mobile | All-in-One 







Build Your System

Clear Options

Quantum™ II Amplifier Description

Print Friendly, PDF & Email

The Quantum™ II is a self contained sound system that supports two infrared wireless microphones for plug-and-play instruction. Simply remove it from the box, plug it in, and you’re ready to amplify learning!

Two wireless microphones can be used simultaneously–one for the teacher and one handheld for student participation or co-teaching. It can further expand the multimedia experience with its audio input and audio output ports. This can be connected to a computer, projector, TV, or virtually any audio source. In fact, it can synchronize the classroom audio with video conferencing applications like Zoom. This ensures that all listeners hear the teacher equally through the same microphone.

Its lightweight aluminum body makes it easy and convenient to locate where needed. A mounting bracket is included for wall mount and a mobile display mount applications. It can also be placed on a flat surface, attached to a tripod, or mounted with a display such as a TV or interactive whiteboard.

The Quantum II also features a connection for a second 8 ohm speaker, which doubles your coverage. Plus, its advanced infrared (IR) technology enables the use of multiple Quantum II units in the same room without interference.

Why IR?

Quantum™ II Amplifier Details


  • 2 infrared wireless microphone receiver channels Powerful 30 W, low noise, class D digital audio amplifier
  • Digital equalization and limiting Efficient full range coaxial speaker
  • Built-in wide-angle infrared sensor for reliable 180° IR reception
  • Tone control, ±6 dB, to control treble & bass
  • 3.5 mm auxiliary line level input for computer, interactive whiteboard or audio device
  • 3.5 mm line output for Lesson Capture or Assistive Listening System (ALS)
  • External speaker output for companion speaker to expand sound coverage (50 W total)
  • 2 external microphone sensor inputs, single RCA
  • 3/8"-16 threaded insert for speaker stand mount
  • Wall mount bracket included
  • Compatible with video conferencing applications by connecting input & output to a PC.


Weight 4.25 lbs
Dimensions 4.75 × 6.125 × 14 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

50 Hz – 15 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

900 sq ft, 60 ft line of sight

Aux Input

3.5 mm with gain control

Line Output

3.5 mm with gain control


Tone control, ±6 dB

Output Power

30 W (RMS)

External Speaker Output

20 W / 4 Ω

External Speaker Connection

2 terminal phoenix connector

Power Supply

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

Quantum™ II Amplifier Components

Classroom Component Layout

  • Sapphire (IRT-60) wireless pendant transmitter, a high-quality cardiod microphone with lanyard.
  • Quantum™ II Sound Field amplifier/receiver to support classroom audio sources.
  • Companion Speaker to expand the sound coverage and increase total output to 50 watts.
  • IRH-35 Wireless Handheld Microphone. Perfect for student participation or co-teaching.

Quantum™ II Amplifier Downloads

Quantum™ II Amplifier Frequently Asked Questions

  • add_circleremove_circle_outlineI need Portable Audio. What is my best option?

    For regular classroom use, many teachers prefer to use the Quantum II for infrared wireless transmission. This system uses the same Sapphire Pendant transmitter that is used with the infrared classroom sound-field systems. This unit will cover up to 1800 square feet and must be used indoors. This amplifier can be wall mounted, installed on a tripod stand or free standing on a shelf or cabinet.