Description: Two-channel (stereo) ultra low noise active balanced to unbalanced adapter.
Manufacturer: KMTech Design (UK).
Configuration: PCB (circuit board) only.
Noise-cancelling method: Onboard differential-mode receiver.
Chipset: Powered by 100% genuine Burr-Brown SoundPlus ultra-low noise OPA2134 chipset (not supplied).
Total Distortion: 0.00008%.
PCB Mounting: 4 x 4mm mounting holes. 4 x nylon mounting pillars (included).
Volume Control: Output attenuation via dual trim pots (not supplied).
Power Supply Type: 12V AC-DC Adapter with +ve terminal in middle (not included).
Input connectors: Twin high quality Neutrik female XLR sockets (not included). 
Output connectors: Twin RCA phono sockets (not included).
Virtual Ground: TLE2426 precision rail splitter IC (not included).
CMRR: Minimum 40dB. Can be increased by using precision 0.1% resistors..
PCB Dimensions: Length 80 mm, Width 60 mm, thickness 1.6 mm (fire resistant pcb). 
Weight: Approx 10g.
Enclosure type: No enclosure fitted.


Components you will need to finish this unit:

  • 2x Neutrik NC3FAAH2 PCB mounted XLR connectors.
  • 2x PCB mounted phono sockets (or can solder wire directly to board if you wish).
  • 8x 10k 1/4W 1% resistors.
  • 1x TLE2426 precision ground reference IC.
  • 1x OPA2134 Ultra-low noise op-amp IC.
  • 1x DIP-8 IC socket.
  • 1x 100nF ceramic capacitor.
  • 1x 220uF electrolytic 15V capacitor
  • 2x 6mm 100k trimmer-type potentiometer.
  • 1x DC power socket (or can wire directly to board).
  • 1x "Wallwart" 12V 1A DC power supply.
  • 4x 4mm pcb pillars. 
  • All these components can be found on eBay and many other sources.


THIS IS THE PCB-ONLY VERSION. NO COMPONENTS ARE SUPPLIED! 

WE ALSO SELL A FULLY ASSEMBLED VERSION, AND A SINGLE CHANNEL VERSION.

If you require more than one of these boards we can give you a great discount. Please ask.
   
A high performance, stereo, ultra low noise balanced-to-unbalanced adapter by  KMTech Design.
Common-mode interference on the hot and cold input lines is dealt with by the onboard differential-mode receiver.
Because this adapter uses SoundPlus Technology, ZERO audible noise/distortion is added to your signal!
If you need an enclosure, there are other units on eBay with enclosures, but expect to pay 2-3 times the price.
Remember, an enclosure can hide a multitude of sins. Some similar adapters don't even use audio grade op-amps!
However if your priority is sound quality and value for money, then look no further!

PLEASE NOTE THIS LISTING IS FOR A BARE CIRCUIT BOARD. PHOTOS SHOWING ASSEMBLED UNITS  ARE FOR ILLUSTRATION ONLY.

YOU WILL NEED SOLDERING SKILLS AND EQUIPMENT TO ASSEMBLE THIS PRODUCT. BE SMART. BE SAFE. ALWAYS WEAR PPE WHEN SOLDERING.