This five resistor load bank can be adapted for audio by dividing all of the resistor values by 100.
Then the values are 10 ohms each, and the total load can be adjusted among 12 values, from 20R to 2.5R.
Choose the power rating of the resistors for your needs..
https://www.electronicdesign.com/re...step-resistor-load-bank-is-simple-and-modular
Then the values are 10 ohms each, and the total load can be adjusted among 12 values, from 20R to 2.5R.
Choose the power rating of the resistors for your needs..
https://www.electronicdesign.com/re...step-resistor-load-bank-is-simple-and-modular
It has 4 switches but only 12 settings - using 4 binary scaled resistors you can synthesize 15 steps of resistance (or 16 if you include a 5th resistor), although in arithmetic sequence rather than the desirable geometric sequence. Its an interesting problem in optimization whether you can get 16 geometrically scaled resistances from only 4 switches...