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Interface Extension Kit[709]

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ADAU1701 Audio Digital Signal Processor Kernel Board - APM2




AA-AB11428 is the interface extension board specially designed to provide audio input and output interfaces for APM2. Taking customers’ common applications into consideration, APM3 works as a 2 x in, 3 x out extension board, suitable for audio 2.0 / 2.1 system. To maximumly satisfy different requirements of customers‘ projects, APM3 provides multiple kinds of interfaces, including 2 x RCA jacks, 1 x 3.5mm AUX IN jack, 2 x PH-4Pos connectors for audio input and 3 x RCA jacks, 1 x 3.5mm AUX IN jack and 2 x PH-4Pos connectors for audio output.

Easy for Installation and Integration

As APM3 offers multiple interfaces for audio input and output, it’s easy and simple to integrate APM2 and APM3 to your audio systems through cables connection. In addition, APM3 is in 2’’ x 2’’ compact size, the same size as APM2, making them simple to be installed in any cabinet without occupation of too much space to leave enough headroom for other components.

Package Includes

1pc AA-AA11428, Interfaces extension board

1pc PH-10Pos connection cable

  • Board TypeBoard
  • inputRCA, 3.5mm AUX, Others,
  • outputRCA, 3.5mm AUX,
  • Control InterfaceHardware
  • Size2 x 2 inches (50.8mm x 50.8mm)
  • 2 x 2 inches(50 x 50 mm) Compact PCB Size
  • 2 RCA input, 3 RCA output
  • 1 AUX input, 1 AUX output
  • 1 PH-4PIN-2MM input,
  • 1 PH-4PIN-2MM output
  • Powered by DSP kernel board
  • Suitable for audio 2.1 system



30 Nov 2022

Hello, is it possible to use the J3 Input and the J8 Output and also get the J10 for the subwoofer to work? (or does the J10 subwoofer only work with the RCA input?) Thanks

Hello, Sebastiaan. Thank you for your interest in our products. Yes. When you use the J3 input and J8 output, you can also get the J10 for subwoofer output. Wish this could help you. Have a nice day~


31 Oct 2022

Can I use this interface extension along with the DSP kernel board and a 4-channel amplifier to design 1/2 of a stereo speaker pair? In other words, both speakers would have their own power supply, interface extension, DSP kernel and amplifier. One speaker would only get a left input, and the other would only get the right.

Hello, Rob. Thank you for your interest in our products. We can't understand your meaning clearly. Maybe this video on using 2pcs APM2 to build 4-in 8-out audio system would be helpful to you. Here is the link. https://www.youtube.com/watch?v=qa_bESPwCTY If there is still problem, please send an email to store@sure-electronics.com with detailed description so that we can help you solve it. Wish this could help you. Have a nice day~


18 Feb 2021

This board seems to introduce lots of unwanted noise. Other people using this board have the same problem. The DSP module with this RCA board has much less noise. Do you know a way to fix this?

Hi, Michael. Thank you for your feedback. Since the gain of the high power amplifier board is high, even tiny noise would be amplified into big noise. It is recommended to use APM2 with low power and mid-low power amplifier boards. We will develop new version APM board to solve the problem in the future.

Robert G.Johnston

23 Dec 2020

I have the "Interface Extension Kit[709]" and ned the circuit diagram to be able to understand it's function and make use of it. Where can I download the circuit diagram? Thank you for your help Bob J.

Hi, Bob. Thank you for your interest in our products. Here is the manual of APM2 and APM3. You can find the pin definition in it. http://store.sure-electronics.com/images/documents/Digital%20Signal%20Processor%20Series.pdf As for the required program and application notes, you can find them in the 'Download' part in the product page. Wish this could help you.


04 Nov 2020

How do i control the sub output? I Connect this Way: APM 2 +amp3 to volume control to amplifier. Where do i control sub output?

Hi, Thomas. Thank you for your interest in our products. There are four potentiometers on the APM2. POT1 and POT2 is for sub output. POT1 is used for adjustment of the gain of bass and POT2 is used to set the cut-off frequency of bass. If you want deeper control, it is suggested to buy ICP programming board for APP control or programming with SigmaStudio. Wish this could help you.


22 May 2020

Please add a "Connection" tab to show pins and layout like your other product pages.

Hi, haley. Thank you for your kind suggestion. We have added the 'Connection' to Interface Extension Kit (AA-AA11428). Wish this could help you.


05 May 2020

Hello. If I understand the product correctly, there are 2 input channels and 3 output channels. According to the datasheet, the ADAU1701 has 4 output channels. Is it at all possible to use the 4th output channel on this board?

Hello, geppa. Thank you for your interest in our products. Please kindly be noted that the APM3 is a 2-in, 3-out interface board. It provides RCA, 3.5mm headphone and line output ports. But they cannot be used at the same time. Wish this could help you.


29 Jul 2019

Does this come with the cable to connect to the DSP kernel board?

Hello, Katra. Yes, the 10pin cable for connecting with APM2 (DSP Kernel Board) is in the package of this Interface Extension Kit.

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