Assembled and tested PCM1794a board with opa1611 and 1612 op amps SPDIF input   $139.95

No Case.     Requires 14 to 16vac power supply  No returns or refunds on  bare boards.


international shipping

USB to AES Converter.  Bi Directional converter with XLR inputs and outputs.

Uses the Tenor 7022 chip 96khz @24 bits works with Mac and PC



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PCM1794A Soldered to 28 pin dip adapter  $39.95

With pins.


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pcm4222 soldered to dip adapter $49.95
international shipping

DAC output op amps confusing?

The original TI  output  circuit for the I/V converter and the 2nd order filter used ne5534’s and LT1028’s to achieve a snr of 129 and 132db (dual mode).

 Every op amp we use is better in performance than the original design.

Some folks can’t live without the sound of an opa627 so we offer them.

Due to the high failure rate of the ADA op amps we will now only offer them on special request.  We no longer make the GearSlutz Unit which turned out to be a total flop and was the worst advice we have ever taken.  The parts had to be mounted with a GearSlutz hack and when they died we could not get our money back on any parts.  Lost thousands of dollars, still have units to replace and we took all of the blame for it.  Did not bash folks on social media.  Should have known better.

Thanks so much!

Let us design your next circuit board.  Reasonable rates.