PentaClass AB

SKU: PentaClass AB
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PentaClass AB

Classroom audio system with built-in Bluetooth.
PentaClass AB is a multimedia classroom system with omnidirectional 360 degree soundfield. It has been designed for both wired and wireless audio connectivity with a Bluetooth audio-ready device. PentaClass AB is the perfect solution for contemporary teachers using Bluetooth-enabled devices. PentaClass AB is recommended for rooms where voice amplification is unnecessary.

PentaClass A

360° OMNIDIRECTIONAL SOUNDFIELD: Enjoy truly rich sounds whenever you are seated in the room.
LED STATUS INDICATION: A specific light will illuminate on the top panel.
HI FI DESIGN - WOOD BOX: Vocal sound clarity, a full range for multimedia and a rich bass for music.
EASY INSTALLATION: In a matter of minutes you can install the PentaClass using the supplied mount on a ceiling or wall.
REMOTE CONTROL: Remote control for the easy operation of your PentaClass.
AUDIO PRESETS: Choose voice, multimedia and music EQ presets.
1300 SQFT (120 SQM) COVERAGE: Suitable for room sizes of up to 1300 ft2 ( 120 m2).
UPGRADABLE: Upgrade from the PentaClass A to PentaClass AB or ABM version.

Size: 23 cm H x 24 cm W



Frequency response: 80 Hz - 20 Hz
Output: 45W @ 8 ohms
Loudness: 85 dB
Signal to noise ratio (typical): 106 dB


Inputs: 1 x AUX, 3.5 mm stero
Output: 1 x Aux, 3.5 mm stero, mixed

In the box

PentaClass speaker
Power supply: 19V 2A
Power cord
Remote control with battery
Fixation bracket with screws

SKU: AE0002A

PentaClass-A Classroom

PentaClass Room

PentaClass-AB Size

Frequently asked questions

How many devices can be connected to PentaClass AB?
Two. You can connect an audio source to the analog input and a Bluetooth device as well.

What is the difference between PentaClass models?
PentaClass A comes with one wired analog audio input, the PentaClass AB comes with Bluetooth® connectivity in addition to the wired analog audio input. The PentaClass ABM comes with a wired analog input, Bluetooth® connectivity and a wireless Microphone receiver and transmitter.

How do I connect the Certes PentaClass AB to my Bluetooth device to stream audio wirelessly?
To activate Bluetooth by the unit’s remote control please do the following:
   • Turn on the speaker;
   • Press the Bluetooth button to activate the Bluetooth channel;
   • The PentaClass speaker Status indicator should start blinking in blue. This command will activate the Bluetooth channel and it will become scanable for Bluetooth devices for 1.5 minutes;
    • In the list of Bluetooth devices on the Settings page of your device please find the Bluetooth device named PentaClass-000000…. (the last 6 symbols will differ as they display the mac address of your PentaClass);
   • Connect your device to the PentaClass Bluetooth channel.

Do I need any additional amplifiers for PentaClass?
No, all PentaClass audio speakers have a pro quality built-in amplifier.

What is the difference between PentaClass models?
PentaClass A comes with one wired analog audio input, the PentaClass AB comes with Bluetooth® connectivity in addition to the wired analog audio input. The PentaClass ABM comes with a wired analog input, Bluetooth® connectivity and a wireless Microphone receiver and transmitter.

Is it easy to install PentaClass?
Yes, you just need a drill and screwdriver to install the PentaClass on a wall or on a suspended or concrete ceiling – it takes about 20 minutes. However, if you put it on a table, you don’t need any tools – it is ready to go as soon as you take it out of the box.

Do we need a specially trained person to install the device?
No, the PentaClass can be installed by anybody who knows how to use a screwdriver.

Can I use PentaClass with my interactive whiteboard?
You can use it with your interactive whiteboard, projector or with any other audio source.

Does PentaClass need an electrical socket?
Yes, the PentaClass speaker must be plugged into an electrical socket. If you decide to mount the device on the ceiling we can also offer a long-run power cable.

What should I do if I have bigger auditoriums than 120m2? How can I install the PentaClass in larger auditoriums?
You can daisy chain up to 3 PentaClass speakers. The first one acts as the Master and the other two will be slaves. Connectivity can be made using an audio cable with a 3.5mm jack – from the Master output to the slave input. In daisy chain scenarios the supplied remote control will control the Master PentaClass and thereby control the slaves as well.

If I have a problem with my PentaClass where do I get support?
Please contact your nearest reseller. If you cannot find one nearby please contact us directly.

I cannot find my user manual, where can I download one?
All product literature can be downloaded at the Support page of our website under downloads or you can just click here to go directly to the download page.

We will need a power supply for the USA rather than for Europe. Will our PentaClass come with this?
Yes, your PentaClass will come with a power supply appropriate for your area of the world

PentaClass Specifications (Dependent upon model)

Speaker specification

Frequency Response: 80 Hz – 20 kHz 
Output: 80 Hz – 20 kHz 
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: Range up to 15 m (depends on wireless environment)
Mixer: Built in AUX with Bluetooth or AUX with Microphone
Microphone reciever: 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 
Built in equalizer presets: speech, multimedia, music 
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) 
Acoustics: Omni-directional, plywood sound box, fine-tuned port. Designed for rooms up to 120 m2 (394 sq ft) 
Dimensions (W x H x D): 24x24x23 cm (9.45×9.45×9.06 in) 
Weight: 3 kg (6.61 lbs) 
Mounting: Universal wall/ceiling mount supplied 
Included accessories: Power supply, power cord, remote control, wall/ceiling mount, user manual

Microphone specification

Signal transmitter: 2.4 GHz radio frequency with frequency hopping 
Built in microphone: Dual microphone system with feedback cancellation 
Level control: AGC (Auto Gain Control) 
Total harmonic distortion (typical): 0.004 % @ 1 KHz 
Signal to noise ratio (typical): 92 dB 
Power: Built in rechargeable 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): 2.5×6.0x1.3 cm (0.79×2.36×0.40 in) 
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 microphone control mode: 3 multifunctional buttons (Microphone on/off, Mute, Microphone volume up, Microphone volume down) 
Wearing options: Lanyard or clip (both included) 
Included accessories: Charger, lanyard, clip


PentaClass benefits

Wireless Microphone

Certes PentaClass ABM comes with the smallest teacher’s microphone on the market, which is not bigger than a thumb, with a size of 60x25x13mm (2,36”x0,79”x0,39”), it weighs just 20 grams (0,71 ounces).

Ease of use

As the system has an auto-pairing feature, it can be activated with just two simple actions – turn on PentaClass and turn on the microphone.

Microphone with Rechargeable Battery

Forget about changing batteries, the built-in Li-ion battery ensures 7 hours of operating time. You can recharge it by using a regular micro USB cable

Microphone with two wearing options

Thanks to its size, the microphone can be worn with a lanyard or clip. Just choose the option that suits you the most.

Built-in Mixer

The built-in mixer allows you to mix analog input with Bluetooth or microphone channels without unplugging the cables or disconnecting the wireless connection.

Feedback cancellation

The dual microphone system with AGC (automatic gain control) minimises the possibility of getting acoustic feedback.

Microphone 2-in-1 feature

The microphone has dual functionality – the microphone and a remote control. When it is not used for voice transmitting, One Classroom – one speaker

Thanks to its special design, just one Certes PentaClass speaker is able to spread sound evenly in the classroom and is suitable for room sizes of up to 120 m2 (1300 ft2). In case you have an auditorium bigger than 120 m2 (1300 ft2), you can daisy chain up to 3 PentaClasses.

Robust design

The plywood box, aluminium speaker protector and durable plastic parts combine to ensure a long-term lifespan for PentaClass.

Thanks to its simple and elegant design, it will fit into any interior.

Frequency hopping

This ensures that only the cleanest frequency bands are automatically selected for the connection between the microphone and PentaClass.

Un-compressed voice

The PentaClass microphone uses a state-of-the-art transmitter and receiver that operate in the 2.4 GHz worldwide license-free band.

Thanks to digital transmission, you get pristine, high-definition voice reproduction.

Common features to all PentaClass models

All-in-One device: PentaClass combines the speaker, amplifier and mixer all in one.

Simple installation: In a matter of minutes you can install PentaClass using the mount on the ceiling or wall.

Hi-Fi acoustic design: The PentaClass design ensures sound clarity on voice, the full range for multimedia and a rich bass for music.

Audio presets: This allows you to choose the audio mode by switching between voice, multimedia and music presets.

System status indication: Depending on the PentaClass status, it will illuminate a specific light.

Remote Control: All PentaClass versions come with a remote control for the easy operation of devices.

Hearing loop devices ready: Thanks to the mixed Aux output, you can connect PentaClass to any hearing loop device.

Power-saving mode: The automatic power-saving mode switches on if there is no incoming signal for more than 20 minutes.

Dynamic Range Compression: Whether you are listening at a low or high volume, the DRC ensures the quality of non-distorted sound.

360 Omnidirectional sound field: Enjoy the truly rich sounds whenever you are seated in the classroom.


Students’ performance has improved by 30% in classrooms where the classroom audio solutions have been used in the learning process. 

More than 50% of teachers and professors suffer from voice disorders.

Children spend 75% of their day listening. 

In 67% of cases, the background noise in the classroom was louder than applicable laws and regulations allow.


PentaClass Brochure
PentaClass User's Manual
PentaClass French Brochure
PentaClass English Infographic
PentaClass French Infographic

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