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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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2 x 50 Watt Class D Audio Amplifier Board w Bluetooth Ver4.0 - JAB2




This board is a high performance 2 x 50W audio amplifier board with ADAU1701 DSP integrated, which can be used with WONDOM JAB2 to build audio 4.0 system with both DSP and Bluetooth. This JAB3-250 is suitable for boomcase, DIY, digital crossover and other applications. With WONDOM ICP series, it can be programmed via SigmaStuido. Customers can control the audio system through the four potentiometers on the JAB3-160 or through WONDOM APP - Miumax. It supports WONDOM battery board, greatly improving the flexibility.

Miumax V2.0 has been released. Following are the download address.

For Android: video link

For iOS: Please go to APP Store and search 'Miumax' directly.

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: video link

Video for reprogram through SigmaStudio: video link

Video for APP control instruction: video link

How to use Sigma DSP to make a signal generator within less than 3 minutes: video link

  • 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







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.

Copyright 2020 @ Sure Electronics Co., Ltd.