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Referencing the question raised in Speaker level to line level, it was mentioned that there would be a great deal of heat dissipation and that the 8 ohm resistor would need to be physically large. I would like to build a "plate soak" aka "power soak" for my 60 watt tube amplifier and it needs to be able to handle this amp when it's cranked, the point being to overdrive the power tubes and feed that signal into my line level effects pedals. What type of resistor would be most effective at dissipating this heat or do I need a heatsink of some sort? Would this https://www.mouser.com/c/passive-components/resistors/chassis-mount-resistors/?resistance=8%20Ohms#:~: work?

I would like to include a switch allowing either "Speaker Out", "Line Out" or both (parallel).

I am new to this and would appreciate any help regarding the circuit and appropriate componants you can offer.

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    Look at the accepted answer to the question you referenced. What you need is a "pad" to reduce the voltage to line level. The pad consists of two resistors, and their power dissipation is also discussed in the accepted answer. – Math Keeps Me Busy Mar 12 '23 at 23:39

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