[1401] SSM2166 Compressor pcb

Date: December 19th, 2012 | Comments : [5] | Categories: DIY.

SSM2166 pcb

The SSM2166 Compressor pcb is in stock. You can place your order for it here.

You can also view the schematic and parts list.


5 Responses to “SSM2166 Compressor pcb”

[3757] David Says: 9:27 am, February 4th, 2013


I just received the SSM compressor PCB this past Friday! Well laid out, good size traces, overall its a great PCB!

You stated in the instructions that “the PCB was designed so that special pots designed for direct mounting to circuit boards can be used”.

Can you please supply me with a product number for any of the suppliers that you sourced the parts from? I will most likely be mounting my PCB into a Hammond box (like your green prototype pictured).

Also, one final note- the diode that I used for D1 has thicker leads than your board allowed for- actually, the diode will fit, but its pretty darn tight. You might want to check up on various suppliers and maybe make a note for future so someone else doesn’t get frustrated while trying to insert the part.


[3758] Ken Says: 11:09 am, February 5th, 2013

I ordered the “Alpha Single Gang 16mm Right-angle pc mount” pots from Small Bear Electronics and they fit great! … very nice sounding compressor by the way!

[3846] Bambang Says: 11:02 am, April 23rd, 2013

Can you give me good schematics guitar amplifiers. where Ican SSM2166.Thank for Schematics all.

[3848] Ben N Says: 4:22 am, April 25th, 2013

Hey, Jack,
Nice revision, I have a chip that I meant to wire up on perf, but the new board is temptiing.
Do you think it would be feasible to split the audio and sidechain inputs? I guess this would involve an outboard buffer (maybe Q1 with a jumper?) to feed the audio signal to pin 3 (through the C5 position on your board), and use pin 7 for sidechain input only? What are your thoughts? TIA,

[4229] J Epstein Says: 8:05 pm, September 16th, 2013

@Ben N:

I know it’s been a long time since your comment but I was just wondering the same thing.

Looking through the application notes for the chip, it sounds to me like you are on the right track. The control signal is derived from the Audio In pins, 6 and 7, so that would be the correct place to inject a sidechain signal. The action of the VCA is applied to the Pin 3 audio input so that would be the place to inject whatever signal you’d like to compress.

One difficult requirement in this setup is that the input you are driving with your audio only has a 1K input impedance, so it’s a somewhat heavy load for whatever device is driving that audio input. You’d need a buffer between most gear and a 1K input – the input at pins 6 & 7 is a much easier load, 180K ohms.


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