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Your cart is empty. Specifications:
Working Voltage: DC 3V-5V
Board Size: 23mm x 15mm
Note:
Manual measurement, with small error. Please check size in detail before purchase.
Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness.
We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution.
Package Includes: 2Pcs
Rob
August 21, 2025
I, too, discovered from M0NTV's YouTube channel that the resistors R1 and R2 on the as-built factory PCB had been swapped at birth. The correct value for R1 is 1k for -48 dBV noise threshold and R2 is 15k for 2:1 compression ratio. Needless to say, I must have been one of the unlucky ones. All things considered, this is a very useful module once the resistors have been swapped. Be advised that this review is for what I received. Later manufacturing revisions may have corrected the error. So, check your PCB with an ohmmeter against the Analog Devices SSM2167 data sheet. Pin 7 is used for noise threshold while pin 8 is used for compression ratio. R1 is connected to pin 7 while R2 is connected to pin 8.
KJ7LNW
August 1, 2025
My headset mic on my desk phone was too quiet. I looped it through a 2.5mm to RJ9 adapter and it sounds much better. IMPORTANT: Remember to remove R1 and R2 if you solder on your own variable resistors! I covered them in the process and de-soldering was rather time consuming.
Nick C.
May 12, 2025
As other reviewers have stated, the R1 and R2 values need to be swapped. This is not a big deal if you can solder 0805 surface mount parts. Otherwise it's perfect.
Henrik B.
May 3, 2025
The product is pretty much useless without a schematic or a link to one! If I missed it, please let me know where to find it, thanks!Holding a MSEE I figured I would know how to hook it up and test it, so I did. The data says that working voltage is 3 - 5V DC so I used a 3.7 V battery and verified that the board was powered, I hook up input and trace the signal to the input of the second amplifier input, so far so good. Then, checking to output, result: NOTHING. Everything else appears to be OK, correct component values and so on. No Output!I purchased 4 of these, so far I have tested 3 and NONE of them work even though I used different approaches, I though I would write this before I test the the 4th. I don't know what the problem is, anyone?
Rebekah
April 12, 2025
Excellent mic amp and outstanding AGC circuit/chip. Note that these boards come with R1 and R2 mounted in wrong position. Swap R1 (Gate) and R2 (Comp) for circuit to work... or use the values indicated on the chart for your application. Note that R1 is GATE and R2 is COMP. R1 and R2 are also incorrectly reversed on the chart. R1 should be 0 to 5k, R2 should be 0 to 175k.
Robin A
March 11, 2025
The Good : they are very small , easy to find a place in my project enclosure. The noise gate works well with a slight fade instead of an abrupt signal cancelling. The compression is very smooth. The stock resistors provide a good base line, although I did add a 100k Potentiometer to select compression Ratio.The frustrating : I had seen reviews of inop boards, and the second of the two I received did not work , signal was not passing through. On my board, magnified inspection revealed a solder "whisker" between pins 9 and 10 ( Output and Vdd) . I reflowed with a little flux and a touch of my soldering pencil, which brought the board to life.Warnings: Vcc is 5.5v max.If you add pots for the noise gate or compression ratio be sure to remove the associated SMD resistor ( R1 and R2 ) near their pads
JohnG
March 5, 2025
I wish that there would have been some kind of operation information.
Sar Nel
January 4, 2025
Wired one up to run on USB - barely brought dynamic mic from mic level to instrument level, so I need to test different equipment and power levels. But, cool idea and small form factor, plus a favorable price.
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