Resistor value filter section

Hi guys,

I opened an amp with heavily burned power resistors.
The board itself was burned as well.
I expected it to be the VCC supply of the opamps in the filter section, but I don't read strange numbers there.

Does anyone know how much the resistor value should be? Since they are all discoloured?
 

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It possibly could be, I can measure tommorow.

They all read different because of the damage they have taken. They all read with between 54 and 47 ohms.
Since the colour code is discoloured it's hard to identify the resistor value.

The amp is a Gladen 150c4.