USB audio problem

[print (sudo)]

Just found out I'm using a B503....not a B103......not sure if they are compatible....but for the schema:

schema.png

Note that you can combine the output to the speaker for both channels (you need an additional schema with additional resistors for that) ....for simplicity....I just connected one channel.

see: http://www.sudomod.com/forum/viewtopic. ... 261#p12261 for wiring stereo to the speaker

thanks for the schema, the speaker is not giving audio but the headphone jack is but the audio is distorted.
I removed the amp and everything worked somewhat fine...

[print (sudo)]

This is what I've done so far. the speaker was connected before, but no audio

[Droopy22]

B503 is 50 ohms
B103 is 10 ohms
they are supposed to work fine both of them

[print (sudo)]

B503 is 50 ohms
B103 is 10 ohms
they are supposed to work fine both of them

Thanks, but with the schema that I'm using that was provided by TimBer, I'm getting no sound though the speaker and the sound is distorted when I have headphones in. Maybe it the Amp?

[Droopy22]

What is exactly your USB module? (just a DAC, DAC with on-board amp?) if you have a ref. Could be useful.

On the diagrams the " L - " and "R - " from the output PAM8403 don't seem to be grounded, are they well grounded on your project ?