Speaker to line level converter experiment, need advice.

[yepimonfire]

It may or may not work as intended, but I'd like to give it a shot. The maximum output voltage of my receiver is about 28v RMS, my plan is to use a 10kohm resistor and a 1200 ohm resistor to cut the voltage to 3v RMS at maximum volume. I chose 10kohm for R1 because the majority of unbalanced inputs of amplifiers are 10kohm.

First question, what type of resistor would be best? Obviously, the goal is a flat frequency response. Secondly, I'm not entirely sure if noise would be an issue, the plan is to either find or build a suitable cable to go from the speaker level to the divider that is shielded. If noise was an issue, what would be the best way to solve it?



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[everettT]

Are you not willing to sure your hypothesis?

 

[ski2xblack]

So what are you trying to do, add a power amp to a receiver that lacks pre-outs?

 

[yepimonfire]

So what are you trying to do, add a power amp to a receiver that lacks pre-outs?

Yup. I have a cheapo lepai amp to test it with, not worried about destroying it.

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[highfigh]

It may or may not work as intended, but I'd like to give it a shot. The maximum output voltage of my receiver is about 28v RMS, my plan is to use a 10kohm resistor and a 1200 ohm resistor to cut the voltage to 3v RMS at maximum volume. I chose 10kohm for R1 because the majority of unbalanced inputs of amplifiers are 10kohm.

First question, what type of resistor would be best? Obviously, the goal is a flat frequency response. Secondly, I'm not entirely sure if noise would be an issue, the plan is to either find or build a suitable cable to go from the speaker level to the divider that is shielded. If noise was an issue, what would be the best way to solve it?



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This may help, depending on your math skills.

http://www.electronics-tutorials.ws/attenuators/attenuator.html

You could google search for 'Passive attenuators'.

 

[yepimonfire]

This may help, depending on your math skills.

http://www.electronics-tutorials.ws/attenuators/attenuator.html

You could google search for 'Passive attenuators'.

Thanks. That's exactly what I was planning on doing, but didn't know about the balanced arrangement. Will have to look into it.

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