Balanced Input Kit (Discontinued)

We no longer stock these kits but you can order the PCBs directly from OSHPark here:

The Balanced Input Kit packs a high-quality, balanced input stage into a tiny, cost-effective package. Easily add balanced inputs to your own designs or existing gear.


  • Tiny form factor: 1.4″ x 1″ (25 x 36mm)
  • RFI filter network on input and output
  • High-quality, bipolar, DC-blocking capacitors
  • Supports numerous line receiver/driver ICs:
    • THAT Corp. 12xx series
    • Texas Instruments INA13x series
    • Analog Devices SSM2141
  • .100" (2.54mm) spacing of I/0 pads fits standard connectors
  • Three #4 (Ø.125", 3.2mm) mounting holes
  • Large ground pad for convenient testing

Kit Includes

  • Printed Circuit Board
  • All PCB components
  • IC Socket
  • THAT Corp. 1256 IC
  • Size: 1.4″ x 1″ (25 x 36mm)
  • Mounting Holes: 3x #4 (Ø.125", 3.2mm)
  • I/O Pad Spacing: .100" (2.54mm)
Electrical (with THAT 1256 IC)
  • Input Impedance: 24kΩ
  • Max. Input Voltage:  27.5dBu
  • CMRR: 50dB
  • Gain: -6dB
  • Power Supply: ±3 to ±18VDC