PentaClass Model ABM

The PentaClass ABM model is more than just a hearing amplifier. With all the exciting el-ements of the PentaClass AB, but the ABM model adds microphone capability.

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Product Description

This model brings a new dimension to a hearing amplifier, and the cutting edge technology of PentaClass has developed the smallest teachers microphone on the market. No bigger than a thumb and weighing only 20 grams, it is comfortable for all day wear.

Worn either with a lanyard or a clip the battery will last for 7 hours before being recharged using a regular micro USB cable. The dual microphone system with automatic gain control minimises the possibility of getting acoustic feedback. The digital transmission means you get pristine, high definition voice reproduction.

The Hi-Fi acoustic design provides sound clarity for voice, full range for multimedia and a rich bass for music making it the complete audio system for any state of the art classroom environment.

PentaClass has an output to feed directly to FM transmission systems for deaf or hearing impaired children, you don’t need a separate microphone for this. Just like all of the PentaClass systems, this hearing amplifier can be installed in almost any room with just two screws, power and a single audio cable.

This is an audio system like no other on the market, simple to install and use, it offers so many opportunities for enhanced learning.



Frequency Response 80 Hz – 20 kHz
Output 45 W @ 8 Ω
Loudness 86 dB
Signal to noise ratio (typical) 106 dB
Total harmonic distortion + noise (typical) 0.07% @ PO = 1 W
Inputs 1 x AUX, 3.5 mm stereo
Output 1 x AUX, 3.5 mm stereo, mixed
Bluetooth (only in AB and ABM models) Range up to 15 m (depends on wireless enviroment)
Microphone reciever (only in ABM model) 2.4 GHz radio frequency with frequency hopping
Power Requirements 110V/240V AC 50-60Hz 1A
Power saving mode Turning off system after 20 min. inactivity
Amplifier Class D, 44 100 kHz sample rate, 24 bit
resolution, digital audio processor (DAP),
dynamic range compression (DRC), soft mute
Mixer Built in A UX, Bluetooth (AB and ABM models),
and AUX, microphone (ABM model)
Control Infrared remote control with 7 buttons
(Speaker power on/off, Mute, Audio presets,
Speaker volume up, Speaker volume down,
AUX on/off, Bluetooth on/off (enabled for
AB and ABM models)
Built in equalizer presets Speech, multimedia, music
Acoustics Omni-directional, plywood sound box,
fine tuned port. Designed for rooms up to
120 m2 (1291 sq ft).
Dimensions (W x H x D) 24 x 24 x 23 cm (9.45 x 9.45 x 9.06 in)
Weight 3 kg (6.61 lbs)
Mounting Universal wall/ceiling mount supplied
Included acessories Power supply, power cord, remote control,
wall/ceiling mount, user manual


Signal transmitter 2.4 GHz radio frequency with frequency
Built in microphone Dual microphone system with feedback
Level control AGC (Auto Gain Control)
Total harmonic distortion (typical) 0.004 % @ 1 KHz
Signal to noise ratio (typical) 92 dB
Power Built in rechargable Li-Po battery
Battery life with full charge (active mode) up to 6 hours
Recharging time up to 4 hours
Dimensions (W x H x D) 2.5 x 6.0 x 1.3 cm (0.79″ x 2.36″ x 0.40″)
Weight 20 g (0.71 ounces)
Charger Micro USB supplied. Power Requirements
110V/240V AC 50-60Hz 1A
Control in remote control mode Infrared remote control built in with 3
multifunctional buttons (Speaker power
on/off, Mute, Audio presets, Speaker volume
up, Speaker volume down, AUX on/off,
Bluetooth on/off)
Control in microhone control mode 3 multifunctional buttons (Microhone
on/off, Mute, Microhone volume up,
Microhone volume down)
Wearing options Included acessories Lanyard or clip (both included)
Charger, lanyard, clip

Features and specifications are subject to change without prior notice