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

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. -(negative) connections are shared both ends.

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: