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2 x 50 Watt Class D Audio Amplifier Board with Audio DSP - JAB3-250 (for Gaming Kiosks)[705]

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Functional Cables Kit For The Connection Between JAB2 With JAB3 (JAB accessories)



L-style Aluminum Bracket (JAB accessories)



3S 18650 Lithium Battery Charger and Balance Protection Board - BCPB2




JAB3 – 250 is an All-in-one stereo Class D audio amplifier board integrated with high performance DSP – ADAU1701, outputting 50W per channel into a 4Ohm load based on Texas Instruments TPA3116 chip. With the integrated DSP chip, JAB3 can be applied to various DIY audio, commercial or industrial applications such as digital crossover, bass enhancement, loudspeakers, kiosk, etc. After connection with WONDOM programmer – ICP series, JAB3 supports programming with SigmaStudio, remote control through APP or PC UI.

Demo program of Stereo JAB3: video link

Open-sourced firmware of Stereo JAB3 for restore factory settings: video link

Video for how to achieve I2S input and output of JAB3: video link

Video for introduction of JAB3: video link

Video for connection with JAB2 and APP control: video link

Video for reprogram DSP with SigmaStudio: video link

Miumax Download link for Android Phone: video link

Miumax Download link for iOS Phone: Please go to APP Store and search “Miumax” directly.

PC UI Miumax for JAB3 download link: video link

Integrated with DSP

The on board fully programmable 28-/56-bit audio DSP ADAU1701 from Analog device is competent in various signal processing applications. This process can compensate for real-world limitations of speakers, amplifiers, and listening environments, providing dramatic improvements in perceived audio quality.

Four potentiometers are provided on JAB3 for real time hardware control of the whole audio system for volume, gain and high / band pass filter.

Supporting SigmaStudio Program and Remote Control

Different applications have unlike requirements on audio as the speakers, the environment and the preference are different. To give customers better control of audio systems, Sure Electronics has released In-circuit programmers (ICP series), with connection of which, you can program DSP with SigmaStudio or remote control the system with APP or PC UI.

We have developed an APP – Miumax for remote control, with which, you can adjust volume, gain, frequency and EQ setting. PC UI is also available for different applications as digital crossover, bass enhancement, subwoofer, and so on.

Sure Electronics has provided open-sourced files for customers to start the project quickly. You can download on the “Download” part.

High Quality Audio Performance

Thanks to dedicated PCB layout design and engineers’ attentive debugging, this JAB3 - 250 audio amplifier board features high audio performance, whose SNR is 88dB and THD+N performs well as 0.04% @ 4Ohm, 5W, 1kHz.

Low Power Consumption and Long Playback Time

Power management system and Signal level sensor system are employed on JAB3 for low power consumption. We have preset a threshold on the input voltage of the signal. When there is no signal detected in 5min, JAB3 would enter into standby mode automatically.

This JAB3 - 250 audio module dissipates only 120mW in standby mode. The extremely low power consumption ensures long playback time especially when JAB3 - 250 is powered by battery boards, which is absolutely an advantage for portable Bluetooth speakers.

Supporting Battery Power

A DC10V-26V power supply is required to power JAB3 - 250.

In addition to power supply, JAB3 also supports battery power, which greatly improve the portability and flexibility of audio systems.

Please kindly noted that MPPT circuit is not employed in JAB3. So JAB3 cannot be used to recharge batteries. If you only buy JAB3 and want portable battery power, it is recommended to use WONDOM Battery charging, protection and balance board – BCPB series. If you have a JAB1 / JAB2 at hand, you can use the WONDOM Battey charging and protection board (JAB – BE, AA-JA11113) for power.

Easy for Installation

Four screw holes provided make this Bluetooth amplifier board easy for installation and quick for integration in any cabinet. We provide a Functional cables kit (JAB - FC) for your convenient operations. Furthermore, a 3.6’’ x 2.7’’ L-style aluminum bracket (JAB - LAB) is available to fix the Bluetooth amp in wiring process and to install the board to cabinets.

Build Audio 2.1/4.0 system with Bluetooth and DSP

JAB2 can connect with mono JAB3 to build an audio 2.1 system or connect with stereo JAB3 to build an audio 4.0 system. This built system will be integrated with both Bluetooth and DSP, suitable for portable Bluetooth speakers and digital crossover applications. A Functional cables kit (AA-AJ11116) is released for your convenient connection. As for the connection, please kindly take the .

Package Include

1pc AA-JA32172, JAB3 - 250

1pc power supply cable

1pc stereo speaker cable

1pc 3.5mm AUX IN cable

  • StyleBoards
  • Number Of Channel(s)2
  • Output Power50
  • Size3.6 x 2.7 inches (91.44mm x 68.58mm)
  • ChipsetTPA31xx
  • Heat DissipationHeat Sink
  • inputOthers,
  • Power Voltage12V-26V
  • 3.60 x 2.70 Inches PCB Size
  • Battery Board Supported*
  • Power Management Circuit
  • DSP Integrated
  • Gain of Speaker Output Adjustable
  • High-pass Filter of Speaker Output Adjustable
  • High-pass Filter of 3.5mm Headphone Output Adjustable
  • Overall Volume Adjustable
  • Signal Level Sensor System*
  • External 3.5mm AUX IN Port
  • Power Switch Port*
  • 3.5mm Headphone Output
  • Compatible with JAB2*
SpecifiSpecifications typical @+25℃, powered by 24V DC, unless otherwise noted. Specifications subject to change without notice.
Number of Channels--2--
Minimum Load Impedance-3.24-Ω
Efficiency2 x 50W@4Ohm, 1kHz-84-%
Nominal Power Requirement@24V, 1kHz-130-W
Operating Voltage@1kHz, 4Ohm122426V
Idle PowerSignal detected-2-W
No Signal detected-60-mW
Switching FrequencySD Floating@24V-400-kHz
Power Consumption1/4 of max output power@4Ohm, 24V, 1kHz-35-W
1/8 of max output power@4Ohm, 24V, 1kHz-20-W
 ControlStandby(Low = inputs enabled)High-level Input Voltage3.3--V
Low-level Input Voltage--0.8V
Mute(High = outputs enabled)High-level Output Voltage                                                         3.3  V
Low-level Output Voltage--0.8V
Standby PowerSD short to GND, only when low power module available-120-mW
Under Voltage Protection-10.010.410.8V
Specifications typical @+25℃, powered by 24V DC, unless otherwuse noted. Specifications subject to change without notice.
Amp Gain@4Ohm, 20Hz - 20kHz-26-dB
DSP GainSE1 (Single Amp)@4Ohm, 1kHz-60-0dB
SE2 (Headphone)@4Ohm, 1kHz-60-6.5dB
Input Sensitivity2 x 50W@4Ohm, 1kHz, 26dB 770 mV
Filter GainButterworth, Q= 0.707-4-dB
Cutoff FrequencyHFP0.25-2kHz
SNR2 x 50W@4Ohm, THD+N=1%, 26dB, A-weighting 88 dB
THD+N5W@4Ohm, 1kHz, 24dB 0.04 %
10W@4Ohm, 1kHz, 24dB 0.06 %
Input Impedance- 10 
Supported Sampling Rates--48-kHz
Output Noise LevelA-weighting, Input Connected to GND, 26dB 260 uV
DC Offset- 10 mV
Max output LevelJ3, 3.5mm Headphone Output Connector 7.8 dBu
Crosstalk Separation20Hz-20kHz, Gain=26dB--60-dB







06 Jan 2023

Hello, I wish replace an old amp in small studio monitors, could the amp go below 250Hz or it's filtered? Thanks

Hello, Yan. Thank you for your interest in our products. There are filters in the default program in JAB3, and you can adjust the cut-off frequency through the potentiometers on JAB3. As for the adjustment range, you can refer to the datasheet. If you want full frequency signal, you can modify the program based on provided demo project. Wish this could help you. Have a nice day~


14 Nov 2021

Hi, I've bought three of these and after trying the simple bypass program in SigmaStudio all I hear is a very very quiet distorted sound on both outputs. Both LEDs are lit on the board, the ICP1 programmer is connected and the USB show green in Sigma Studio, Compile/Link/Download also works without error.Same result with switch on ICP1 in position 1 or 2 What could be wrong

Hi, ambrose. We didn't see anything wrong from your description. Could you please send your program file as well as a video showing your operation and the distorted sound so that we can pinpoint the problem and solve it for you? We will reply to you as soon as we receive your email. Have a nice day~


23 Sep 2020

boa noite ,eu comprei este amplificador faz alguns meses ,no começo ele estava funcionando perfeitamente mas a uns dois meses atrás ele vem dando alguns ruídos e estouros que só normalizam depois de algum tempo, não sei oque fazer!!

Hi, leonardo. Could you please send a video to us to show the problem so that we can solve it for you? The email address is store@sure-electronics.com. We will reply to you as soon as we receive your email.


27 Jun 2020

Hi there, will there be a 4ch version of this? Something like the AA-AB33182 but with DSP and bluetooth. If we could have a 4 channels it would be a perfect solution for bi-amped speakers (to drive the tweeters and mids on one channel each with dsp tuning for each) 2x50w + 2x100w would be quite perfect.

Hi, Jared. Thank you for your interest in our products. We are thinking about developing a 4 x 50W audio amplifier with BT & DSP. It's under planning now. For now, we recommend you to use stereo JAB2 and JAB3 to build a 4.0 audio system. Wish this could help you.


15 Jun 2020

Hi, is there any power on/off swich available for this amplifier and where this can be connected?

Hi, Athanasios. Thank you for your interest in our products. Short circuit 'STBY' and 'GND' of J12, the board will enter into standby mode and the power will be off. Wish this could help you.


16 May 2020

Hello, Can I use i2s output on jab3 J2? I like connect the Jab3 Board to Tpa230Di board (AA-AB32256) over i2s. Is it possible? Which pins on J2 can I use for it?

Hi, Sven. Thank you for your interest in our products. JAB3 supports I2S output. As for the connection with AA-AB32256, please kindly see the attached picture. Please be noted that programming would be required to achieve I2S output of JAB3. Wish this could help you.

bastiaan.van biezen

23 Feb 2020

Hey, I have the same question as Lukeas. Is it possible to bridge these boards? The jab3's have no bluetooth and for my current project I don't need DSP controls. Thanks!

Hi, bastiaan. Thank you for your interest in our products. Considering your demands, Sure Electronics has provided mono JAB3 too. Here is the link for your reference: http://store.sure-electronics.com/product/AA-JA31181 If your project needs Bluetooth other than DSP, you can have a look at the JAB2 - audio amplifier with Bluetooth. http://store.sure-electronics.com/product/AA-JA32171 Wish this could help you.


28 Jan 2020

Hello, is there any way to reduce the amplifier hiss? it is audible from over a meter away at low volumes

Hello, Marcello. Please check the following items: 1. Avoid the cable for audio input is too long; 2. Avoid the input is hanging in the air; 3. Avoid there is ground loop between the external audio source or the power supply and the amplifier board; 4. Try to adjust the treble gain to match the input sensitivity of speakers. If possible, please send an email to store@sure-electronics.com with a video or a picture showing the connection and problem. We will solve it for you as soon as we receive it.


12 Jan 2020

Can the speaker grounds be connected?

Hi, Wesley. Thank you for your interest in our products. Please kindly be noted that the speaker grounds cannot be connected. Wish this could help you.


30 Jul 2019

Hello, can I bridge this amplifier to make 1x100w, instead of 2x50w?

Hi, Lukas. We have released the 1 x 100W version of this JAB3 board in our online shop. The link is as follows: http://store.sure-electronics.com/product/AA-JA31181. Wish this could help you.

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