Here is there info needed to address the problem:
The Audio output has an RC Filter of 100ohms and 0.1uF for a -3dB frequency of 16kHz.
The boards were stuffed with 10uF instead for a 160Hz cutoff.
The filter is not really necessary so the caps may be removed.
If you do the rework yourself, send an email to sales@...
with REWORK <order#> as the subject and we will refund $10.
Or you may send the board only to:
NW Digital Radio
150 Cessna Ave
Friday Harbor WA 908250
We will rework it for you and refund $5 for the postage
We have updated our manufacturing test to provide better coverage.