Preamble
Continuing from the Line discussion in Atari Punx… and Banging noises……
From this answer to Speaker level to line level
Speaker to Line PCB
For a modern A/V receiver ‘speaker out’ to line level (say you’re using Zone 2 out the back of your A/V receiver and wish to feed another amp that handles only outdoor speakers but you wish the outdoor amp volume to be controlled by A/V receiver) then:
- R1 = 3.9K @ 1watt
- R2 = 430ohm @ 1/2watt
and
- R1 connects from Speaker out RIGHT+ to RIGHT/RCA+
- R2 connects from Speaker out RIGHT- to RIGHT/RCA- AND RIGHT/RCA+(only at RCA)
Repeat for LEFT channel, R3 and R4. -(negative) connections are shared both ends.
Speaker to Line PCB, for home audio – NOT car audio: