Versatile OP-Amp based Audio EQ module.

90 in stock

SKU: SM004-1015-SN Category:


More than an op-amp breakout boared, the SMN AudioEQ is a versatile analog buffering and filtering circuit.  The board is delivered as a fully functional stereo audio buffer with unity gain, and 20-20,000Hz bandwidth.  Ideal for developers and enthusiasts who want to experiment with advanced filtering and equalization circuits.

Key Features of the SMN Audio EQ include:

  • Low noise TL072 op-amps
  • Dedicated Differential Input Buffers
  • Inverted Output
  • Differential Output
  • Two full Opamp based Biquad filters per channel
  • Hipeak feedback circuits
  • 0603 & larger parts for easy soldering
  • Passive shelf filtering
  • TLE2462 based virtual ground for single supply operation
  • Operation from 5V-24VDC input
  • 0603 & larger parts for easy soldering

The SMN AudioEQ can easily be modified for a variety of additional purposes including the following applications:

  • Differential Measurement Buffer/Signal Conditioner
  • Microphone Preamp
  • Crossover Filter
  • BiAmplifier Signal Conditioning
  • SubWoofer Preamp
  • Channel Equalization
  • Sallen-Key Filter
  • Allpass Filtering

The AudioEQ has a gold version or can also be purchased as a bare PCB

AudioEQ-Rev3 Schematic

AudioEQ User Manual

AudioEQ LTspice Circuit

Now available on Amazon

Check our blog for additional projects and ideas on how to use the AudioEQ board.

Upgrade your AudioEQ with a black anodized aluminum enclosure and printed end panels!

Custom versions are possible for an NRE fee.  Possible modifications include alternate op-amps and/or custom designed filters.  Contact us for details.

Additional information

Weight 0.1 lbs


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