TvroPRO, Mad Scientist:
I got to thinking... Could your prototype design be implemented outside the box without opening it up, pulling out the mobo, and soldering into existing audio output connection points?
Could two MonoPrice Y-Splitters at 57 cents each (or equivalent) be adapted to make the Zenith DTT-900 Audio Modification? Tell me straight forward if I'm missing something very obvious, or if there's another reason why this idea will not work. Here's my idea:
Buy two Y-Splitters and your list of parts in your documented plan.
HOME > CABLES > RCA Audio Cables > RCA Plug/2 RCA Jack cable - 6 inches
* Y splitter cable for connecting one monaural audio source to two monaural inputs.
* Use a pair for stereo connections.http://www.monoprice.com/products/pr...seq=1&format=2
Cut off the white female jack on the right red splitter and trim the leads as "pig tails" with positive and ground wires exposed, leaving the black male end to plug into the right red output of the DTT900.
Cut off the red female jack on the left white splitter and trim the leads as "pig tails" with positive and ground wires exposed, leaving the black male end to plug into the left white output of the DTT900.
Build your PCB circuit and wire according to your directions. Enclose in small metal or plastic box, or wrap with electrical tape.
Is this idea wrongly conceived or will this work?