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Volume Control and Input Selector

Digitally Controlled Stereo Electronic Audio Volume Control Board - NJM1109[646]

★★★★★(341 recommends)



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Huntkey HKA02412020-8D 12V 2A 24W AC/DC Power Adapter




This is a digitally controlled stereo electronic audio volume board with gorgeous appearance. It features a mature volume adjustable module and external power and signal output connector. Several wiring methods such as 3.5 mm Socket (Default) facilitate connection. Analog and digital section powers are used independently to minimize the interference. Excellent heat dissipation eliminates the need for an extra heatsink. Over temperature, over current protection and power supply anti-reverse protection are included to extend its longevity of the board.

  • Board TypeBoard
  • input3.5mm AUX,
  • outputRCA, 3.5mm AUX,
  • Control InterfaceHardware
  • Size3.6 x 2.7 inches (91.44mm x 68.58mm)
  • Power Voltage8V-15V
  • Size: 
  • Volume Control Board: 3.6 x 2.7 inches 
  • Decode Board: 2 x 1.5 x1.7 inches
  • Wide Control Range: -107.5dB to 10dB
  • Accuracy: 1dB/step
  • Output Noise Voltage: 15.89μV 
  • THD+N: 0.0327% 
  • SNR: 92.2dB
  • Single Ended Audio Signal Input and Output
  • LED Status Indicator
  • Flexible Connection and Easy Installation
Specifications typical @ +25℃, powered by 12V DC, unless otherwise noted. Specifications subject to change without notice.
Parameter Conditions Min. Typ.  Max. Units
Power Supply - 10 12 15 VDC
Quiescent Current - - 10 - mA
Maximum Current - - 0.5  - A
Operating Temperature -                    0 20 50
Storage Temperature - -20 20 105
Thermal Temperature - - 150 -



30 Jan 2023

Is it possible to control multible boards with only one rotary encoder board by connecting the single boards over J3? In my understanding the NJM1109 chip is controlled as slave in a serial interface so it should be possible the µC on the rotary encoder board controls multiple NJM1109 simultaneously. The target application is a multi channel volume control for digital crossovers.

Hello, Sebastian. Thank you for your interest in our products. Our volume control boards don't support controlling multiple boards with only one rotary encoder board. Have a nice day~


23 Nov 2022

Would a Mean Well RS-15-12 [+12Vdc ~ 1,3A] be enough to power this device? Thank you

Hello, Sebastiaan. Thank you for your interest in our products. The recommended power supply range is DC10-15V. So Mean Well RS-15-12 [+12Vdc ~ 1,3A] is enough to power this volume control board. Wish this could help you. Have a nice day~


25 Jul 2021

what is the maximum distance between volume control and main PCB ?

Hello, peter. The distance should be as short as possible. It is suggested to use the attached connection cable, whose length is 25cm. Wish this could help you.


19 Nov 2019

Can the 3.5mm headphone out be used to go to an active sub? I will use RCA outputs to go to active speakers.

Hi, Dallas. Thank you for your interest in our products. Yes, the 3.5mm headphone output of the Volume Control Board - NJM1109 can be connected to the active speakers directly.

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